【摘要】 对在大气压条件下用非转移弧层流等离子体射流熔凝强化处理的W-Mo-Cu铸铁表面,采用光学显微镜、显微硬度计、磨损试验机、扫描电镜等,观察和测试了熔凝试样的表面层组织、硬度、耐磨性和磨损形貌。结果表明,熔凝后铸铁表面为初晶渗碳体和莱氏体组成的过共晶组织,硬度和耐磨性有了明显的提高。更多还原

【Abstract】 Microstructure, hardness distribution, wear resistance and abrasive surface mophology of W-Mo-Cu cast iron remelted by non-transferred laminar plasma jet at atmospheric pressure were investigated by using optical microscope, micro vickers meter, wear tester and scanning electron microscope (SEM). The results show that the microstructure at remelted surface layer consists of mainly cementite and ledeburite, which apparently improves the hardness and wear resistance of the remelted specimen.更多还原