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    13Jan, 2026
    Different Types of Heat-Resistant Steel Trays
    Heat-resistant steel trays are essential for high-temperature industrial processes like heat treatment, sintering, roasting, and drying. They’re engineered to withstand extreme temperatures, thermal cycling, and corrosive environments while supporting and transporting materials. Different types of these trays use specific alloy compositions to match various temperature ranges and industrial needs.
    Understanding the core traits of each heat-resistant steel tray type helps you choose the best solution. This extends service life, cuts maintenance costs, and ensures stable operation in high-temperature workflows.

    1. Chromium-Molybdenum (Cr-Mo) Heat-Resistant Steel Trays

    Cr-Mo heat-resistant steel trays are widely used in medium-temperature industrial settings. Their key strengths are excellent thermal stability and creep resistance—resistance to deformation under long-term high-temperature stress.
    • Core Alloy Composition: Chromium (0.5%-9%), molybdenum (0.5%-1.5%), blended with carbon steel. Common grades: 15CrMo, 25CrMo, 30CrMo.
    • Key Features: Temperature resistance: 400℃-650℃; good thermal conductivity; tensile strength ≥500MPa; excellent thermal fatigue resistance (no cracking from repeated heating and cooling).
    • Performance Highlights: Maintains structural integrity during long-term medium-temperature use; low deformation rate (≤1% after 1000 hours at 550℃); works well in most neutral and weakly oxidizing environments.
    • Typical Applications: Heat treatment furnaces for automotive parts (gears, shafts) tempering; industrial drying ovens for plastics and rubber; low-temperature ceramic component sintering.

    2. Austenitic Chromium-Nickel (Cr-Ni) Heat-Resistant Steel Trays

    Austenitic Cr-Ni heat-resistant steel trays are premium choices for high-temperature and corrosive environments. They use the combined effect of chromium and nickel to boost heat and corrosion resistance.
    • Core Alloy Composition: Chromium (16%-25%), nickel (8%-20%), low carbon (≤0.08%). Common grades: 304, 316, 310S, 314.
    • Key Features: Temperature resistance: 600℃-1200℃ (310S grade up to 1200℃); excellent oxidation resistance (forms a dense Cr₂O₃ protective film); non-magnetic; good ductility and weldability.
    • Performance Highlights: Resists high-temperature corrosion from steam, sulfur dioxide, and weak acids; minimal thermal expansion and deformation; long service life in continuous high-temperature operations (≥5000 hours at 800℃).
    • Typical Applications: High-temperature sintering furnaces for electronic components; mineral processing roasting trays (copper, aluminum ore); stainless steel part heat treatment trays; glass and ceramic industrial kilns.

    3. Ferritic Chromium Heat-Resistant Steel Trays

    Ferritic chromium heat-resistant steel trays are cost-effective for medium-high temperature environments. They focus on oxidation resistance and thermal conductivity.
    • Core Alloy Composition: Chromium (11%-27%), low carbon (≤0.12%), little to no nickel. Common grades: 409, 430, 441.
    • Key Features: Temperature resistance: 550℃-850℃; excellent medium-temperature oxidation resistance; good thermal conductivity (higher than austenitic steel); lower cost than Cr-Ni austenitic steel.
    • Performance Highlights: Stable structure at high temperatures (no phase transformation); suitable for intermittent high-temperature operations; resistant to stress corrosion cracking in dry environments.
    • Typical Applications: Food processing industrial drying trays (dried fruits, grains); medium-temperature carbon steel part heat treatment trays; high-temperature equipment exhaust components; solar thermal power generation heat collection trays.

    4. Nickel-Based Heat-Resistant Steel Trays (Super Heat-Resistant)

    Nickel-based heat-resistant steel trays are ultra-high-temperature solutions for extreme industrial scenarios. They offer better heat and corrosion resistance than standard steel grades.
    • Core Alloy Composition: High nickel (30%-70%), plus chromium, molybdenum, tungsten, and cobalt. Common grades: Inconel 600, Incoloy 800H, Hastelloy X.
    • Key Features: Temperature resistance: 800℃-1400℃; exceptional creep resistance and thermal stability; excellent resistance to high-temperature corrosion (acids, alkalis, molten salts); high strength at extreme temperatures.
    • Performance Highlights: Maintains structural integrity during long-term ultra-high temperature use; minimal deformation even in harsh thermal cycling; suitable for the most demanding high-temperature processes.
    • Typical Applications: Aerospace component heat treatment trays; advanced ceramic ultra-high-temperature sintering; molten metal handling trays (aluminum, copper); petrochemical cracking furnace trays; nuclear power plant high-temperature components.

    5. Key Selection Criteria for Heat-Resistant Steel Trays

    To choose the right heat-resistant steel tray, match its features to your specific high-temperature conditions:
    • Operating Temperature: Medium (400℃-650℃) → Cr-Mo steel; Medium-high (550℃-850℃) → ferritic chromium steel; High (600℃-1200℃) → austenitic Cr-Ni steel; Ultra-high (≥800℃) → nickel-based steel.
    • Working Environment: Corrosive (acids, alkalis, steam) → austenitic Cr-Ni steel/nickel-based steel; Dry, neutral → ferritic chromium steel/Cr-Mo steel; Thermal cycling → austenitic Cr-Ni steel (good ductility).
    • Load Requirements: Heavy load at high temperature → nickel-based steel/austenitic Cr-Ni steel (high strength); Light-medium load → Cr-Mo steel/ferritic chromium steel.
    • Cost Budget: Cost-sensitive → ferritic chromium steel/Cr-Mo steel; High-performance needs → austenitic Cr-Ni steel; Extreme conditions → nickel-based steel.

    6. Maintenance Tips to Extend Heat-Resistant Steel Tray Life

    Proper maintenance greatly improves the performance and service life of heat-resistant steel trays in high-temperature operations. Follow these tips:
    • Gradual Heating/Cooling: Avoid rapid temperature changes to prevent thermal shock and cracking (especially for austenitic and nickel-based steel trays).
    • Regular Cleaning: Remove material residues, oxide scales, and corrosive substances after use. Use non-abrasive cleaners to avoid damaging the protective oxide film.
    • Wear Inspection: Check for deformation, cracking, and thickness reduction monthly. Replace trays when wear exceeds 20% of the original thickness or cracks are found.
    • Storage Protection: Store trays in dry, ventilated areas. Avoid stacking heavy objects to prevent permanent deformation; apply anti-rust oil for long-term storage (except austenitic stainless steel).

    Why Tailored Heat-Resistant Steel Trays Matter for Your Operation

    Mismatched heat-resistant steel trays cause frequent replacements, operational downtime, and higher costs. Tailored trays—designed for your specific temperature, environment, and load needs—ensure stable performance, extend service life, and maximize your high-temperature equipment investment return.
    Need help selecting the right heat-resistant steel tray for your heat treatment furnace, sintering kiln, or other high-temperature application? Share your operating conditions and requirements for a free customized recommendation!

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    19May, 2025
    Uncover the secrets of heat-resistant steel frames: Heat-resistant in the industrial field

    In the complex environment of industrial production, a high-performance load-bearing tool is essential. Today, I will introduce you to the good industrial product – heat-resistant steel frame.
    1. Product Overview
    The heat-resistant steel frame, from the appearance, adopts a regular frame structure with a unique hexagonal grid design inside. The whole is carefully made of heat-resistant steel, which is both sturdy and practical. The corners and joints of the frame are finely processed to ensure that the structure is stable and can reliably carry all kinds of items.
    2. Production process
    1. Steel selection and pretreatment: Select high-quality heat-resistant steel materials, which must have good high-temperature strength, oxidation resistance and other characteristics. Before the steel is put into production, it will undergo strict quality inspection and pretreatment, such as removing surface impurities and performing flaw detection.
    2. Cutting and forming: Use advanced cutting equipment to accurately cut the steel according to the designed size. Then, through forging, stamping and other processes, the steel is formed into the parts required for the frame, such as frames, grids, etc.
    3. Welding assembly: Use high-quality welding processes, such as argon arc welding, to accurately weld each molded component together to ensure that the weld is firm and uniform, without defects such as pores and cracks, and to ensure the overall structural strength of the material frame.
    4. Surface treatment: In order to further improve the performance and service life of the heat-resistant steel material frame, it will be surface treated, such as high-temperature anti-oxidation coating treatment, to enhance its anti-oxidation ability in high-temperature environments.
    III. Performance highlights
    1. Excellent high-temperature resistance: The heat-resistant steel material enables it to work stably in high-temperature environments, can withstand high temperatures such as above 1000°C, and is not easy to deform or damage in high-temperature operating scenes such as metallurgy and casting.
    2. High strength and deformation resistance: It has high strength and rigidity, can withstand large loads, is not easy to deform when carrying heavy objects, and ensures the safety of material transportation and storage processes.
    3. Anti-oxidation and corrosion resistance: Through special surface treatment and material characteristics, the heat-resistant steel material frame has good anti-oxidation and corrosion resistance, and can maintain good performance in environments with corrosive gases or chemical media.
    4. Reasonable structural design: The unique hexagonal grid design not only ensures the load-bearing capacity of the material frame, but also has good ventilation and heat dissipation, which is conducive to the storage and processing of materials.
    IV. Scope of application
    1. Metallurgical industry: In the production links such as steel smelting and non-ferrous metal smelting, it is used to hold high-temperature metal raw materials, semi-finished products, etc. It can stably carry under high temperature environment, which is convenient for the transportation and processing of materials.
    2. Casting industry: In the casting process, it is used to carry casting molds, sand molds, etc., and can withstand high temperature baking and frequent handling during the casting process to ensure the continuity of production.
    3. Heat treatment industry: In the heat treatment process of parts, as a carrying tool for parts, it can withstand high temperature for a long time in the heating furnace to ensure that the parts are placed stably during the heat treatment process.
    4. Mechanical processing industry: In the mechanical processing workshop, it is used to store and transport various parts. Its high strength and anti-deformation ability can protect the parts from damage.

    Heat-resistant steel material frame plays an important role in many industrial fields with its unique performance and reliable quality, and is an indispensable good helper in industrial production.

     

    7May, 2023
    Heat-resistant Steel Precision Casting

    Heat-resistant Steel Precision Casting

    Characteristics of heat-resistant steel precision castings:

    Heat-resistant steel precision castings should be stacked reasonably according to the layout characteristics during heat treatment to prevent deformation as much as possible. When the as-cast arrangement segregation of the casting is serious, in order to eliminate the influence on the function of the end of the casting, it is necessary to adopt a unified treatment method. In the as-cast arrangement, there are often coarse dendrites and segregation.
    During heat treatment, the heating temperature should be slightly higher than that of forged steel parts with the same composition, and the austenitizing holding time should be extended appropriately. For steel castings with complex shapes and large wall thickness, the cross-sectional effect and casting need to be considered during heat treatment.
    The main elements of high-temperature oxidation and high-temperature corrosion resistance in heat-resistant steel precision castings can improve the thermal strength of heat-resistant steel. The high temperature corrosion resistance of heat-resistant steel has a certain relationship with its chromium content.
    Therefore, the chromium content of commonly used heat-resistant steel should not be lower than nickel, which is one of the important alloying elements in heat-resistant steel. In order to obtain the pure austenite structure of steel at room temperature, the nickel content is not less than 25%. However, when the steel contains other alloying elements, in order to obtain a pure austenite structure, the nickel content can be appropriately reduced.

    Heat-resistant Steel Precision Casting Heat-resistant Steel Precision Casting

    How to clean heat-resistant steel precision castings:

    Heat-resistant steel precision casting is a kind of casting. The cleaning of heat-resistant steel precision castings is divided into general cleaning, ultrasonic cleaning, degreasing cleaning and vacuum cleaning. They have their own characteristics, and the formulas of the cleaning solutions they use are different. Generally, cleaning agents include solvent-based cleaning solutions and water-based cleaning solutions.
    In the actual cleaning process of heat-resistant steel precision castings, the most used ones are:

    1. Metal cleaning agent
    Mostly used for cleaning heat-resistant steel precision castings before heat treatment and chemical heat treatment
    2. 3%-10% sodium carbonate or sodium hydrogen hydride cleaning solution, the temperature is controlled at 80-100°C, and it is mostly used for degreasing and salt slag finishing of heat-resistant steel precision castings after quenching.

    Eternal Bliss Alloy Casting & Forging Co, Ltd.

    Caesar

    E-mail: sales@ebcastworld.com

    Our What’s app: 0086- 182 6227 4295

    www.ebcastworld.com

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    24Nov, 2021
    Quality of Heat Resistant Steel Precision Castings?

    What are the factors that affect the quality of heat-resistant steel precision castings?

    Design process of Castings.

    When designing, in addition to determining the geometry and size of the casting according to the working conditions and the characteristics of the metal material, the rationality of the design must also be considered from the perspective of the casting alloy and casting process characteristics, that is, the obvious size effect, solidification and shrinkage, stress, etc. Problems, can avoid or reduce the occurrence of defects, such as segregation, deformation and cracking of castings.

    Heat Resistant Steel Precision Castings Heat Resistant Steel Precision Castings

    There must be a reasonable conversion process.

    That is to say, according to the structure, weight and size of the casting, the characteristics of the casting alloy and the production conditions, the appropriate parting surface and shape, the manufacturing method of the core should be selected, and the ribs, cold iron, and riser of the casting should be set reasonably And gate system. In order to ensure good Heat Resistant Steel Precision Castings.

    Quality of raw materials used in casting.

    The unqualified quality of metal charges, refractory materials, fuels, fluxes, modifiers and foundry sand, sand binders, coatings and other materials will lead to holes, pinholes, slag inclusions, sand inclusions and other materials in the castings. Other defects will affect the appearance and internal quality of the castings, and if they are serious, they will be scrapped.

    To operate the process, it is necessary to formulate a reasonable process operation procedure to improve the technical level of the workers, so that the process regulations can be correctly implemented.

    Heat Resistant Steel Precision CastingsHeat Resistant Steel Precision Castings

    FAQ:

    Q: What kinds of products do you offer?
    A: Specializing in the production of various heat resistant steel precision casting, Heat-treatment Fixtures, Heat Treatment Baskets, Heat Treatment Trays, Radiant Tubes, Furnace Rollers, furnace grate bars,Smelting pot, Slag Pot, Aluminum Ingot Mold, etc.

    Q: Can you manufacture Customization products?
    A: Yes, We can produce both standard and special prosucts.
    We can produce by your samples or technical drawings.
    We can build the molds and fixtures.

    Q: What is the Warranty for our products ?
    A: If any quality problems on our side occurred in this period , we will take on the shipping cost and replacement.

    Q: What information do we need to provide to you in order to confirm our parts order?
    A: provide us your drawings or detailed specifications for our technical staff could make the drawing.

    Q: What is the delivery time of your products?
    A: It depends on the inventory availability.If items needed are in stock, the delivery time would be within 7 work days, but if not the delivery time would be around 30 work days.
    We will send working schedule of your order each week.
    The detailed inspection picturesion by email.

     

    Eternal Bliss Alloy Casting & Forging Co, Ltd.

    Caesar

    E-mail: sales@ebcastworld.com

    What’s app: 0086-130 930 23772

    https://ebcastworld.com

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    18Nov, 2021
    Design of Heat-resistant Steel Precision Castings

    What should be paid attention to in the structural design of heat-resistant steel precision castings?

    To facilitate the manufacture of models, core boxes, and easy modeling:
    • The shape of the casting should be as simple as possible, so that it can be easy to mold. Try to make the casting parting surface flat and reduce the number as much as possible.
    • For the inner cavity of the casting, use the core as little as possible when casting, or not use it. If it is to be used, there must be enough process holes to facilitate exhaust and so on.
    • In the drawing direction, there should be a certain structural slope to strengthen the structural strength of the casting.
    Heat-resistant SteelHeat-resistant Steel
    Reduce the tendency to produce casting defects:
    1. The wall thickness of the castings should be uniform to prevent defects such as shrinkage holes and hot cracks. It is also necessary to maintain good solidification conditions to prevent problems.
    2. The connection between the iron walls should avoid sharp corners or metal accumulation. The transition between wall thickness and wall thickness should be carried out gradually to avoid sudden changes to prevent stress concentration.
    3. If there is a casting hole on the flat wall of the iron part, the convex edge should be used for reinforcement to reduce the wall thickness.
    4. A large horizontal surface should be avoided in the casting.

    In addition, the casting must have good forming properties, and the wall thickness of the casting must not be lower than the specified range.

    Heat-resistant Steel
    FAQ:

    Q: What kinds of products do you offer?
    A: Specializing in the production of various heat resistant steel precision casting, Heat-treatment Fixtures, Heat Treatment Baskets, Heat Treatment Trays, Radiant Tubes, Furnace Rollers, furnace grate bars,Smelting pot, Slag Pot, Aluminum Ingot Mold, etc.

    Q: Can you manufacture Customization products?
    A: Yes, We can produce both standard and special prosucts.
    We can produce by your samples or technical drawings.
    We can build the molds and fixtures.

    Q: What is the Warranty for our products ?
    A: If any quality problems on our side occurred in this period , we will take on the shipping cost and replacement.

    Q: What information do we need to provide to you in order to confirm our parts order?
    A: provide us your drawings or detailed specifications for our technical staff could make the drawing.

     

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    15Nov, 2021
    Causes and Solutions of Pores in Heat-resistant Steel Precision Casting

    Heat-resistant Steel Precision Casting for Causes and Solutions of Pores

    Reasons for formation:
    • In most cases, the pores appear mainly because the precision casting mold shell is not fully baked. When the molten steel is poured, a large amount of gas is generated in the mold shell and cannot be discharged smoothly, and then invades into the molten metal to form pores.
    • Due to the shell-making process or shell-shaped materials, the gas permeability of the shell is too poor, and the gas in the cavity is difficult to discharge, and it enters into the molten metal to form pores.
    • The porosity of the casting caused by the failure of the air drawn into the molten steel during pouring to be discharged.

    Heat-resistant Steel Precision Casting Heat-resistant Steel Precision Casting

    Prevention methods:

    1. If the precision casting conditions permit, set up vent holes at the height of the casting with complex structure.
    2. When designing the gating system, fully consider the exhaust gas demand of the shell.
    3. The baking temperature and time of the mould shell should be reasonable, and the holding time should be sufficient.
    4. The wax should be completely removed when dewaxing.
    5. Appropriately reduce the distance between the ladle nozzle and the sprue cup, and the pouring speed should be uniform to ensure that the molten steel fills the cavity smoothly, and the air in the molten steel is as little as possible so that the gas in the cavity and t

    Heat-resistant Steel Precision Casting Heat-resistant Steel Precision Casting

    Eternal Bliss Alloy Casting & Forging Co, Ltd.

    Caesar

    E-mail: sales@ebcastworld.com

    What’s app: 0086-130 930 23772

    https://ebcastworld.com

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    11Nov, 2021
    What Factors Affect the Service Temperature of Heat resistant Steel Precision Castings?

    What factors affect the service temperature of heat resistant steel precision castings

    The influence of chemical composition:

    The influence of the composition of heat resistant steel precision casting on high service temperature is mainly manifested in the impact on the high-temperature strength, oxidation resistance and corrosion resistance of heat resistant steel precision castings. These factors have a direct impact on the high operating temperature.

    The influence of size:

    Heat resistant steel precision casting must be able to withstand the deformation caused by their own weight when working at high temperatures.
    Second, the relative oxidation rates of materials of different sizes are different.

    The impact of the working environment:

    Heat-resistant steel precision castings will undergo physical and chemical reactions with the components in the environmental medium at high temperatures, and the surface of the castings will be corroded, thereby reducing their service life.

    Heat resistant Steel Precision Castings Heat resistant Steel Precision Castings

    What are the factors of the error value in the ​temperature measurement of heat resistant steel precision castings
    1. Observation hole obstacle: For most instruments, any weakening of the signal will cause the temperature indication value to drop; dirt on the observation window affects the accuracy of most pyrometers.
    2.  Calibration: The industry standard is to calibrate once a year. However, the drift and failure of the instrument has its own schedule. The ideal approach is to calibrate all optical components used in the factory (observation glass or observation mirror).
    3. Instrument calibration: aiming through the lens requires that the two optical paths overlap accurately, which will affect all levels of conventional pyrometers.
    4. Unknown/changing emissivity-a variety of alloys, disturbance effects, temperature and wavelength dependence, and changes in composition during processing, all of which play a role in the unpredictability of emissivity.
    5. Observation window glass material: not all glasses have the same transmission properties; some are “gray” colored, while the transmission properties of other glasses vary with wavelength. This will cause the conventional pyrometer to fail.
    6. Steam emission: For high-pressure melting (close to and above atmospheric pressure), the overflowing gas in the molten pool or crucible will increase or decrease the heat radiation, thus causing errors.

    Heat resistant Steel Precision Castings Heat resistant Steel Precision Castings

    Eternal Bliss Alloy Casting & Forging Co, Ltd.

    Caesar

    E-mail: sales@ebcastworld.com

    What’s app: 0086-130 930 23772

    https://ebcastworld.com

    Read More

    10Nov, 2021
    Heat-resistant Steel Precision Castings for Strength

    What are the factors related to the strength of heat-resistant steel precision castings?

    The performance of heat-resistant steel precision castings will change, especially after the influence of some specific factors, the performance changes will be more obvious. So in terms of the strength of heat-resistant steel precision castings, what are the influencing factors?

    On the one hand, it must be the influence of temperature. Temperature fluctuations have a great influence on any material, including heat-resistant steel. Due to factors such as multiple starts, shutdowns or overloads, the operating temperature will fluctuate, and temperature fluctuations will accelerate the creep process of the material, thereby reducing the endurance strength.

    Another aspect is the effect of stress. Under the influence of factors such as test temperature, notch geometry, steel’s lasting plasticity, heat treatment process and steel composition, the amount of stress existing in heat-resistant steel precision castings will also be different. This in turn affects the brittleness of the material, so this factor must be given enough attention in the design.

    Heat-resistant Steel Heat-resistant Steel
    What are the factors that affect the accuracy of heat-resistant steel precision castings?
    Influence of casting structure:
    • The casting wall is thick and the shrinkage rate is large, and the casting wall is thin and the shrinkage rate is small.
    • The free shrinkage rate is large, and the hindered shrinkage rate is small.
    The influence of casting material:
    • The higher the carbon content in the material, the smaller the linear shrinkage rate and the lower the carbon content, the greater the linear shrinkage rate.
    The influence of mould making on the linear shrinkage rate of castings:
    • The influence of wax injection temperature, wax injection pressure, and pressure holding time on the size of the investment mold is obvious from the wax injection temperature, followed by the wax injection pressure. The pressure holding time has little effect on the final size of the investment mold after the investment is formed.
    • The linear shrinkage rate of wax is about 0.9-1.1%.
    • When the investment mold is stored, there will be further shrinkage, and its shrinkage value is about 10% of the total shrinkage, but when stored for 12 hours, the investment mold size is basically stable.
    • The radial shrinkage rate of the wax mold is only 30-40% of the lengthwise shrinkage rate. The influence of the wax injection temperature on the free shrinkage rate is far greater than the influence on the hindered shrinkage rate.

    Heat-resistant Steel Heat-resistant Steel

    The influence of shell-making materials:
    • Zircon sand, zircon powder, Shangdian sand, and Shangdian powder are used. Because of their small expansion coefficient, they can be ignored.
    The effect of shell baking:
    • Because the expansion coefficient of the shell is small, when the temperature of the shell is 1150℃, it is only 0.053%, so it can be ignored.
    The influence of casting temperature:
    • The higher the casting temperature, the greater the shrinkage rate, and the lower the casting temperature, the smaller the shrinkage rate, so the casting temperature should be appropriate.

     

    Eternal Bliss Alloy Casting & Forging Co, Ltd.

    Caesar

    E-mail: sales@ebcastworld.com

    What’s app: 0086-130 930 23772

    https://ebcastworld.com

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    6Nov, 2021
    Heat resistant Steel Precision Casting Process

    Heat resistant Steel Precision Casting

    Annealing
    Annealing is a heat treatment process in which steel castings are heated to 20-30°C above Ac3, kept for a certain period of time, and cooled.
    The purpose of annealing is to eliminate columnar crystals, coarse equiaxed crystals, Widmanstatten structure and dendritic segregation in the cast structure to improve the mechanical properties of cast steel.

    Normalizing
    Normalizing is a heat treatment process in which steel castings are heated to 30-50°C above the Ac3 temperature to make them completely austenitized, and then cooled in still air.
    The purpose of normalizing is to refine the structure of the steel so that it has the required mechanical properties, and it is also used as a preparatory treatment for subsequent heat treatment.

    Quenching
    Quenching is a heat treatment process in which steel castings are heated to austenitization and kept for a certain period of time and then cooled in an appropriate manner to obtain martensite or bainite structure.

    Especially after quenching, the tooling workpiece is directly quenched with water, quenched oil, and quenched with brine, which has special requirements for the use of tooling.

    Heat resistant Steel Precision Casting Heat resistant Steel Precision Casting

    heat-resistant steel precision casting of process Requirements

    Heating is one of the important processes for heat treatment of heat-resistant steel precision castings. There are many heating methods. In the past, charcoal and coal were used as heat sources, but now liquid and gas fuels are used for heating. Nevertheless, it is recommended to use electric heating for heat-resistant steel precision casting, which is not only easy to control but also free of environmental pollution.

    Secondly,cooling is also an indispensable step in the heat treatment process of heat-resistant steel precision casting. Although the cooling method varies from process to process, the key is to control the cooling rate. Relatively speaking, the annealing cooling rate of heat-resistant steel precision castings is relatively slow, and the cooling rate of normalizing is faster, and the faster is the cooling rate of quenching heat-resistant steel precision casting.

    When cooling, due to the different steel grades of heat-resistant steel precision casting, the requirements put forward are also different. But in short, heat treatment is a metal heat treatment process that heats the heat-resistant steel precision casting as a whole, and then cools it at an appropriate speed to obtain the required metallographic structure to change its overall mechanical properties.

    Heat resistant Steel Precision Casting Heat resistant Steel Precision Casting

    Heat treatment stress of heat-resistant steel precision casting

    In the heating and cooling process of heat-resistant steel precision castings, due to the inconsistency of the cooling rate and time between the surface and the core, a temperature difference is formed, which will cause uneven volume expansion and contraction to produce stress, that is thermal stress.

    Thermal Stress

    Under the action of thermal stress, because the surface temperature is lower than the core part, and the contraction is greater than the core part, the core part is stretched. When the cooling is over, the core part is compressed because the cooling volume contraction of the core part cannot proceed freely. pull. That is, under the action of thermal stress, the surface of the workpiece is compressed and the core is stretched. This phenomenon is affected by factors such as cooling rate, material composition and heat treatment process.

    When the cooling rate is faster, the carbon content and alloy composition are higher, and the uneven plastic deformation under the action of thermal stress during the cooling process is larger and then the residual stress formed is larger.

    On the other hand, due to the change of the structure of the steel during the heat treatment process, that is, the transformation of austenite to martensite, the increase in specific volume will be accompanied by the expansion of the volume of the workpiece, and the phases of each part of the workpiece will change successively, resulting in inconsistent volume growth and structure. stress.
    The final result of the change in tissue stress is the tensile stress on the surface and the compressive stress on the core, which is exactly the opposite of the thermal stress.
    The size of the structure stress is related to the cooling rate of the workpiece in the martensite transformation zone, the shape, the chemical composition of the material and other factors.

    Heat resistant Steel Precision Casting Heat resistant Steel Precision Casting
    FAQ:

    Q: What kinds of products do you offer?
    A: Specializing in the production of various heat resistant steel precision casting, Heat-treatment Fixtures, Heat Treatment Baskets, Heat Treatment Trays, Radiant Tubes, Furnace Rollers, furnace grate bars,Smelting pot, Slag Pot, Aluminum Ingot Mold, etc.

    Q: Can you manufacture Customization products?
    A: Yes, We can produce both standard and special prosucts.
    We can produce by your samples or technical drawings.
    We can build the molds and fixtures.

    Q: Can the products be customized as our need, such as put on our logo?
    A: Surely our products can be customized as your need, Put on your logo is also available.

    Q: What is the Warranty for our products ?
    A: If any quality problems on our side occurred in this period , we will take on the shipping cost and replacement.

    Q: What information do we need to provide to you in order to confirm our parts order?
    A: provide us your drawings or detailed specifications for our technical staff could make the drawing.

    Q: What is the delivery time of your products?
    A: It depends on the inventory availability.If items needed are in stock, the delivery time would be within 7 work days, but if not the delivery time would be around 30 work days.
    We will send working schedule of your order each week.
    The detailed inspection picturesion by email.

     

    Eternal Bliss Alloy Casting & Forging Co, Ltd.

    Caesar

    E-mail: sales@ebcastworld.com

    What’s app: 0086-130 930 23772

    www.ebcastworld.com

    Read More

    5Nov, 2021
    Heat-resistant Steel Precision Castings

    Heat-resistant Steel Precision Castings of Production Process

    Smelting:
    Heat-resistant steel is generally smelted in an electric arc furnace or induction furnace. High quality requirements often use vacuum refining and out-of-furnace refining processes.

    Casting:

    Some high-alloy heat-resistant steels are difficult to process and deform. The production of castings is not only more cost-effective than rolled products, but also castings have higher endurance strength. Therefore, heat-resistant cast steel occupies a considerable proportion of heat-resistant steel.

    Heat-treated pearlitic heat-strength steel is usually used after normalizing or quenching and tempering.
    Martensitic heat-resistant steel is quenched and tempered to stabilize the structure and obtain good comprehensive mechanical properties and high-temperature strength.
    Ferritic steel cannot be strengthened by heat treatment.
    In order to eliminate the internal stress caused by cold plastic deformation processing and welding, annealing treatment can be carried out at 650～830℃, and rapid cooling after annealing, so as to quickly pass through the brittle temperature range of 475℃.
    Most of the austenitic anti-oxidation steel adopts high temperature solution heat treatment to obtain good cold deformation. Austenitic hot-strength steel is first treated with high-temperature solution treatment, and then aging treatment is performed at 60-100℃ higher than the use temperature to stabilize the structure.
    Heat-resistant cast steel is mostly used in the as-cast state, and some heat treatments are used according to the type of heat-resistant steel.

    Heat-resistant Steel Precision CastingsHeat-resistant Steel Precision Castings

    Production process of heat-resistant steel precision castings

    1. Determine the production process and check the mold according to the drawings provided by the user. If it is a new product, prepare it, determine the molding process, and send it to the mold maker to make a wooden mold.

    2. According to the finished mold, determine the manufacturing process and operation method, the specific steps are as follows:

    • Put the resin sand into the sand mixer according to the old and new ratio and mix it evenly.
    • According to the quality of sand, in principle, add acid and resin according to the mass ratio to produce sand and fill the mold.
    • After the surface is hardened, the mold will be awakened and demolded, then the mold will be repaired, and the mud core will be dropped. After the virtual sand has been blown out, it will be dried by itself after being ignited.
    • Prepare the finished cavity according to the bottom cover box, seal the box and place the gate and riser for pouring.

    Heat-resistant Steel Precision Castings Heat-resistant Steel Precision Castings

    3. Foundry smelting mainly involves the following preparations and operations:
    • First, perform chemical analysis on the raw materials.
    • Put a large piece of bottom material on the bottom of the furnace for pre-melting, and then gradually add small materials and scraps. When adding materials, be careful not to splash out the molten steel to avoid burns.
    • Wait for the molten steel to melt into the furnace cavity.
    • In the molten steel smelting process, in order to purify the molten steel, oxidation smelting is carried out, and the slag covering the surface is stripped off at the same time, and the steel is tapped immediately.
    • The molten steel poured from the furnace cavity into the steel drum is secondarily oxidized. At this time, the aluminum row must be inserted for the second deoxidation. Care must be taken during the operation to avoid burns.
    • When pouring, you must master the time, and wear protective clothing and safety helmets during the operation to be busy and not chaotic.

    4. The product can be sanded at least four hours after pouring, and the finished product can be machined.

    5. The quality inspection department inspects the manufactured products, including the secondary repair of geometric dimensions, surface shapes and defects. After each product is qualified, it will be solid-solution treated and marked with the word “inspection”, then packaged, dispatched, and dispatched. List and product warranty.

    Heat-resistant Steel Precision Castings Heat-resistant Steel Precision Castings

    Heat-resistant steel precision castings of what are the factors that affect the production process
    1. Design process of iron castings. When designing, in addition to determining the geometry and size of the casting according to the working conditions and the material properties of the metal, the rationality of the design should also be considered according to the process characteristics of the casting and the casting alloy to avoid deformation, cracking and composition of the casting. Defects such as segregation.
    2. The casting process should be reasonable, that is, the appropriate modeling and core making method should be selected according to the structure, size and weight of the cast iron. In addition, the chilled iron, riser and gating system must be set reasonably to ensure the quality of cast iron parts.
    3. Whether the quality of raw materials for casting is excellent or not. If the quality of materials such as metal charge, solvent, modifier or paint does not meet the standard, it will cause defects such as porosity, slag inclusion, and sand sticking in the iron castings, which will affect the internal and appearance quality of the iron castings.
    4. The process operation procedures should be reasonable. When making castings, it is necessary to continuously improve the technical level of the workers, and at the same time, formulate reasonable process operating procedures to make the production process correct and reasonable.

     

    Eternal Bliss Alloy Casting & Forging Co, Ltd.

    Caesar

    E-mail: sales@ebcastworld.com

    What’s app: 0086-130 930 23772

    www.ebcastworld.com

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