Alloy powders are metallic powders formed by partial or complete alloying of two or more components. They mainly include iron alloy powders, copper alloy powders, nickel alloy powders, cobalt alloy powders, aluminum alloy powders, titanium alloy powders, and precious metal alloy powders. Their preparation processes include gas atomization, plasma rotating electrode method, and centrifugal atomization technology. Atomization allows for control of powder shape and the production of alloy powders. These powders suffer from high sintering temperatures and easy oxidation of the iron-based matrix. Adding 663 bronze, Cu-P alloy powder, or pre-alloying techniques can lower the sintering temperature.
Iron-based binders, through the application of ultrafine iron powder and the addition of elements such as copper and zinc, reduce the erosion of diamond. Pre-alloyed powders such as Fe-Ni-Cu can improve tool performance. Hard alloys use tungsten carbide as the matrix and cobalt as the binder phase, combining high hardness and toughness. New alloy powders such as Distaloy can simplify the production process, and StarmixBoost powder mixing reduces the proportion of parts exceeding dimensional limits by 50%. Domestic enterprises have overcome technological barriers in titanium alloy powder preparation, achieving improved fine powder yield and the development of heat-free 3D printing materials. High-entropy alloy powders are produced in accordance with the national standard GB/T 42787-2023 and are applied in aerospace and other fields. In the additive manufacturing field, atomized powders are being used to promote the application of titanium and aluminum alloys in aerospace and medical implants.