Major sign one
Troubles in the melting process of refractory materials have been resolve, which has achieved the application of powder metallurgy in domestic industry.
Major sign two
Powder metallurgy has achieved porous oil-contained bearings, iron alloy mechanical parts, and oil pump gears.
Major sign three
New materials with higher performance are developed one after another. Thus, powder metallurgy plays a greater role in the development of modern metallurgy.