So we find that hardening operation is made up of heating and quenching. 因此我們發(fā)現淬火工序包括加熱和淬硬兩個(gè)步驟。
Its original heat treament processes were graphitizing annealing,quenching and tempering,then high-frequency hardening. 同時(shí)因齒條形狀特殊，高頻淬火時(shí)易將齒部完全淬透，不能滿(mǎn)足用戶(hù)要求。
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