一般在调质状态下使用，还可以进行碳氮共渗和高频表面淬火处理。
Generally used in quenched and tempered state, can also carry on the carbonitriding and high-frequency surface hardening.
一般渗碳及淬火后使用，也可以调质后使用。
General carburizing and quenching after use, can also be used after quenching and tempering.
一般渗碳及淬火后使用，也可以调质后使用。
General carburizing and quenching after use, can also be used after quenching and tempering.
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