Types and properties of powder prepared by vacuum atomization

TAMARAC, Fla. - Aug. 11, 2022 - PRLog -- Thermal spray alloy powder

Thermal spraying is a surface strengthening technology. It uses a heat source in the form of electric arc, plasma arc, gas-oxygen, etc. to heat metal or non-metallic materials to a molten or semi-melted state, and atomize them into fine droplets or high-temperature particles under the action of high-speed airflow.

Thermal spray powders are mostly alloy powders, which are generally produced by the atomization method. Ordinary intermediate frequency smelting is easy to cause the oxidation and burning of alloy elements. With the burning of alloy elements, its chemical composition will also change. As a result, the metal powder produced has a color difference, the total oxygen content increases, and sometimes the composition will deviate. Therefore, in order to reduce the oxidation and burning loss of alloy elements, vacuum smelting and inert gas atomization are generally used to make powder. The coating formed after spraying with this powder has good resistance to high temperature oxidation and thermal corrosion, which can meet the requirements of modern aeroengines with high thrust ratio.

High temperature alloy powder

As one of the key components of high-performance engines, turbine disk materials and their manufacturing technology have always received special attention from the aerospace engineering community.

Electrical contact material

Alumina dispersion-strengthened copper alloy (alumina copper or dispersed copper) is a new type of structural functional material developed in recent years. It has high strength and good resistance to high temperature softening, as well as excellent electrical and thermal conductivity. The copper and aluminum are vacuum smelted according to the appropriate ratio, and the powder is made by high-pressure gas atomization.

Stainless steel powder, aluminum alloy powder, etc.

Almost all stainless-steel powders are produced by the atomization method. The stainless-steel powder atomized with nitrogen or hydrogen has a spherical shape, high loose packing density, good fluidity, and low oxygen content. Adopt special consolidation methods, such as hot isostatic pressing or hot injection extrusion process to obtain fully dense products. It is also used in injection molding and thermal spraying processes.

Solder

Brazing is a method of joining metals. Brazing technology is widely used in machinery manufacturing, electronics industry, instrument manufacturing, national defense and cutting-edge technology. In the brazing and soldering industries, metal powder is widely used as filler metal, that is, solder. The solder includes tin-lead alloy, lead-based alloy, tin-based alloy, zinc-based alloy, etc. Brazing materials include copper alloys, silver alloys, nickel-based alloys, etc. Most of the brazing materials are prepared by atomization with high-pressure nitrogen or hydrogen.https://www.edge-techind.com/category/Thermal-Spray-Mater...