理论研究及生产实践均已证明,低碳马氏体经低湿回火后具有较好的综合机械性能,但切削性能较差,所以多用于毛坯状态或淬火后只进行磨加工的零件。一些资料认为低碳马氏体进行中温回火或高温回火由于机械性能下降而不宜应用,但实际上并非完全如此。低碳马氏体中温回火后代替中碳结构钢的调质件也是有其特点的,其机械性能和硬度完全可以达到要求。而且不论其形状如何复杂,淬火后均不易变形开裂。这样零 Theoretical research and production practice have proved that low-carbon martensite has good comprehensive mechanical properties after low-humidity tempering, but the cutting performance is poor, so it is mostly used for rough parts or parts after quenching only grinding. Some sources believe that low-carbon martensitic tempering at high temperature or high temperature tempering due to reduced mechanical properties and not suitable for use, but in fact not entirely so. Low-carbon martensitic tempering after the replacement of carbon structural steel conditioning is also characterized by its mechanical properties and hardness can meet the requirements. And no matter how complex its shape, after quenching are not easy to deformation cracking. This is zero