Process of high-density tungsten alloy

High-density tungsten alloy, also known as tungsten-based heavy alloy, is a type of alloy made of tungsten as the matrix element (85% ~ 99% mass fraction) with the addition of Ni, Cu, Fe and other alloy elements by liquid phase sintering.
 
MIRAMAR, Fla. - July 7, 2020 - PRLog -- High-density tungsten alloy is traditionally prepared by powder metallurgy, and its sintering process is as follows: Powder --Mixing - Pressing -Sintering - Heat treatment -Plastic deformation (Forging, rolling) -Annealing-Product
Sintering

Heat treatment


Post-sintering heat treatment includes: quenching, rapid cooling, atmospheric dehydrogenation treatment and surface hardening treatment, the purpose is to reduce the segregation of P, S and other impurities at the interface, reduce hydrogen embrittlement, improve alloy performance or meet other alloy performance requirements. Quenching and rapid cooling treatment can obtain a fine and uniform grain structure, better play the role of solid solution strengthening, and increase the strength of the alloy by 1/3 to 1/2.

Plastic deformation processing
Machining

After plastic deformation, the appropriate machining method can be selected according to the drawings, such as: turning, milling, cutting, drilling, polishing, etc.

High-density tungsten alloy (https://www.edge-techind.com/Products/Refractory-Metals/T...), also known as tungsten-based heavy alloy, is a type of alloy made of tungsten as the matrix element (85% ~ 99% mass fraction) with the addition of Ni, Cu, Fe and other alloy elements by liquid phase sintering. The density is up to 16.5 ~ 19.0g / cc. The most commonly used are tungsten nickel copper and tungsten nickel iron alloy with tungsten content of 90% -97%. Tungsten nickel copper alloy is a non-magnetic alloy, while tungsten nickel iron is a magnetic alloy. W-Ni-Fe series alloys are widely used because they have better mechanical properties than W-Ni-Cu (https://www.edge-techind.com/Products/Refractory-Metals/T...) series alloys.
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