To adopt the metallography hardness method to study microstructure transformation of medial carbon steel 40 being heated and cooled.
采用金相-硬度法研究了中碳钢（40钢）在加热和冷却时的组织转变。
This test shows that it is a simple and non-destructive method to determine surface brittle cracking sensitivity by Vicker′s hardness method.
说明了维氏硬度压痕法是一种测定表面开裂敏感性简便易行的方法。
This test shows that it is a simple and non-destructive method to determine surface brittle cracking sensitivity by Vicker′s hardness method.
说明了维氏硬度压痕法是一种测定表面开裂敏感性简便易行的方法。
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