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nitrogen-containing high speed steel
met.
含氮高速钢
(【技】高速钢中加人氮可以细化晶粒,促使钼系和钨钼系钢中的 M₂C 型碳化物转变,提高淬、回火硬度和热塑性,有利于提高钢的切削性能。)
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