硬钢是含碳量较高，硬度较大，但较脆的钢。钢是铁（Fe）中加入碳(C)合成而成，视C含量多少而变硬或变软。
硬钢(hard steel) 软钢(mild steel) - 又称低碳钢，含碳量从0.10％至0.30％低碳钢易于接受各种加工如锻造，焊接和切削，常用于制造链条、铆钉、螺...
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淬硬钢 [材] Quenched Steel ; hardening steel ; quench hardening steel
顶硬钢 prehardened steel
特硬钢 Glass-Hard Steel ; Extra Hard Steel ; Adamant Steel
自硬钢 [材] Self-Hardening Steel
中硬钢 Medium-Hard Steel ; [材] half-hard steel
自淬硬钢 Self-Hardening Steel
热硬钢 Red-Hard Steel
空冷淬硬钢 Self-Hardening Steel
超硬钢 extra hard steel ; superhard steel
磨削热导致回火引起淬硬钢磨削后表面硬度变化。
Tempering resulting from grinding heat caused surface hardness changes of hardened steels after grinding.
回火完全淬硬钢得到的最终组织结构被称为回火马氏体。
The final structure obtained from tempering a fully hardened steel is called tempered martensite.
由于马氏体这一淬硬钢主要成分的不稳定性，使得回火成为可能。
Tempering is possible because of the instability of the martensite, the principal constituent of hardened steel.
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