3D printed nickel-based alloys and cobalt-chromium alloys for metallic materials

01 Nickel-based alloy

Nickel base alloy (nickel base alloy) refers to a class of alloys with higher strength and certain resistance to oxidation and corrosion at high temperatures of 650 to 1000 ° C. Compared with iron-based alloys and cobalt-based alloys, nickel-based alloys can work in high temperature and high stress environments, and have good mechanical properties, oxidation resistance, and hot corrosion resistance. With the development of the aviation industry, 3D printed nickel-based alloy objects are used for the preparation of hot-end components such as turbine disks and turbine blades in aviation engines due to their excellent performance, which improves the stability and thermal efficiency of the engine and makes aviation development Power has more thrust. A nickel alloy containing 50% titanium has a good shape memory effect and is mostly used in the manufacture of spacecraft structural parts and artificial heart motors.

In718 nickel-based superalloy rotor
In718 nickel-based superalloy rotor prepared by 3D printing technology in the United States (Image source: Machine Design)

02 Cobalt chromium alloy

Cobalt-chromium alloy (cobalt-chromium alloy) is a high-temperature alloy with cobalt and chromium as the main components. It has excellent corrosion resistance and mechanical properties. The parts made with it have high strength, high temperature resistance, and outstanding biological properties. Compatibility, first used to make human joints, has now been widely used in the field of oral cavity. Because it does not contain nickel and beryllium elements that are harmful to the human body, 3D printed customized cobalt-chrome alloy porcelain teeth have become the first choice for non-precious metal porcelain.

Cobalt-chromium alloy products produced by traditional casting processes have large shrinkage rates and large errors compared to the initial model. Cobalt-chromium alloy parts manufactured using 3D printing technology have high strength and precise dimensions, and the smallest size that can be produced can reach 1mm Therefore, the mechanical properties of its parts are much better than the products made by the forging process.

3D printed nickel-based alloys
3D printed nickel-based alloy industrial parts (Image source: ExOne)

03 Liquid metal

Liquid metal refers to an amorphous metal. The liquid metal used for 3D printing is usually composed of gallium and indium, two non-toxic alloys that can remain liquid at room temperature. In 2013, researchers at the University of North Carolina in the United States Development. When liquid metal is exposed to the air, the surface of the material will harden, but the interior remains liquid, which is why it can remain flexible. Since liquid metal can conduct electricity, it means that it will be possible to use similar technologies to make liquid metal circuit boards using 3D printers.

The application of liquid metals has broad prospects. In addition to printed circuit boards, liquid metal has excellent thermal conductivity in the field of advanced chips and new energy. In the field of medical and health technology, the unique liquid metal materials directly contributed to the formation of the field of liquid metal biomaterials. Liquid metal also has much room for development in neural connection and repair, rapid replacement of damaged bones, 3D printing of implanted medical devices directly in vivo, high-resolution angiography, and tumor vascular occlusion treatment.

3D printed nickel-based alloy aircraft parts
3D printed nickel-based alloy aircraft parts (Image source: 3dprintingindustry.com)



Eternal Bliss Alloy Casting And Forging Co.,Limited

Cheng Ningjing



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