Hand Tools

Subject:
powder metallurgy
Response To:
Microstructure ()

Bill Tindall, E.Tn.
A person that helped develop this process happens to be a vendor at Midwest Old Tool Collectors shows. He is entertaining to talk to.

The main benefit of this process is to reduce the crystal size of alloying elements that crystalize rapidly to form large crystals. If vanadium is added to ordinary steel at a high percentage, for example, the result would be formation of large vanadium crystals as the melt slowly cooled. In the powder process the atomized metal melt is quenched in liquid nitrogen. The rate of cooling precludes large crystal growth. The resulting powder is (at least at one time was) loaded into an artillery barrel and blasted compact with an explosive charge.

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