42CrMo钢离子氮碳共渗与激光复合处理及其耐磨性的研究

在相同的激光工艺参数条件下，对经调质，离子渗Ｎ、离子ＮＣ共渗和稀土催渗ＮＣ共渗的４２ＣｒＭｏ钢进行相变复合处理，试验结果表明，离子ＮＣ共渗和稀土催渗ＮＣ共渗渗速度快，渗层深度大，渗层和钢表面的碳浓度高，使Ｍｓ点降低，增加了复合处理的硬化层深度，提高了硬化层的硬度，硬化层组织不高于其它复合处理，在滑动磨粒磨损条件下，其耐磨性比其它复合处理的更好。

Study on Composite Treatment of Nitricarburizing and Laser Hardening for 42CrMo Steel and its Wear Resistance

In the same of laser's parameter, 42CrMo steel is treated by laser bardening respectively after com-posite treatment of quenched and tempered, ion- nitrided, ion - nitricarburized and RE - ion - nitricarburized. The re-suits show that the bardening depth and hardness of the composite treatment ion nitricarburizing or RE-ion-nitri-carburizing and laser hardening are much larger than other composite treatment. In the condition of sliding wear, thecomposite treatment of ion - nitricarburizing or RE-ion-nitricarburizing and laser hardening have much better wearresistance than other composite treatment.