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.
采用导电加热切削技术切削淬硬钢的特点在于：可以采用普通机床、硬质合金刀具对淬硬钢进行硬车削加工。
The feature of machining harden steel by means of EHM are: it can utilize the carbide tool to machine the harden steel in engine lathe.
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.
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