淬火冷却是零件获得一定的表面硬度、淬硬层深度、显微组织、残余应力及由其引起的畸变等结果的热处理工艺过程的一个阶段。低淬透性钢淬火冷却的主要工艺参数是淬火烈度,它大大高于常用碳素钢和价廉的低合金钢所要求的淬火烈度。所谓的体积-表面淬火,其冷却过程实质上既不同于整体热处理的淬火,也不同于感应加热淬火。 Quenching and cooling is part of the heat treatment process to obtain a certain degree of surface hardness, hardened layer depth, microstructure, residual stress and the resulting distortion of the heat treatment process. Hardening of low hardenability steel quenching the main process parameters is the quenching intensity, which is much higher than the commonly used carbon steel and low alloy steel required quenching intensity. The so-called volume - surface hardening, the cooling process is essentially different from both the overall heat treatment of quenching, induction hardening is different from quenching.