grain hardening 砂糖晶粒的固结
fine grain hardening coefficient 细晶硬化系数
Improper forging process will also appear large grain or uneven, hardening crack phenomenon, forging cost is higher than the casting flange.
锻造工艺不当也会出现晶粒大或不均，硬化裂纹现象，锻造成本高于铸造法兰。
And the precipitation of Nb has the effect of precipitation hardening and grain refinement.
钢中铌的沉淀析出具有沉淀强化和晶粒细化的作用。
The mechanism of laser hardening is martensitic hardening and grain refining.
激光相变硬化机理主要是马氏体强化和晶粒细化。
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