CAJ | 학술논문

为改善1Cr12Ni3MoVN合金耐磨性能，采用Nd：YAG激光在该合金表面进行了激光熔覆试验。分析了熔覆层微观组织，测试了显微硬度及在大气环境下的干滑动摩擦磨损性能。结果表明：熔覆层和基体实现了良好的冶金结合，熔覆层组织主要为板条马氏体和残余奥氏体，且较基体得到明显的细化；硬度值由熔覆层（平均452 Hv）到基体区（290 Hv左右）逐渐减小，硬度峰值出现在熔合线附近，达487 Hv。熔覆层的耐磨性能得到明显改善，其磨损失重量约为基体的67％。
위개선1Cr12Ni3MoVN합금내마성능，채용Nd：YAG격광재해합금표면진행료격광용복시험。분석료용복층미관조직，측시료현미경도급재대기배경하적간활동마찰마손성능。결과표명：용복층화기체실현료량호적야금결합，용복층조직주요위판조마씨체화잔여오씨체，차교기체득도명현적세화；경도치유용복층（평균452 Hv）도기체구（290 Hv좌우）축점감소，경도봉치출현재용합선부근，체487 Hv。용복층적내마성능득도명현개선，기마손실중량약위기체적67％。
To improve the wear-resistance of 1Cr12Ni3MoVN alloy,cladding layer on 1Cr12Ni3MoVN substrate was prepared with pulsed Nd:YAG. The microstructure and micro-hardness of laser cladding layer were investigated. The properties of dry sliding friction and wear in the air were tested. It was found that the cladding layer was well combined with the substrate,and the microstructure of cladding layer is composed by martensite and residual austenite. The grains of cladding layer were much finer. Micro-hard-ness values decreased from cladding layer(452HV)to substrate zone( about 290HV),the maximum (487HV)value happened in the HAZ close to the melting line. The wear resistance of cladding layer was improved obviously than that of 1 Cr12 Ni3 MoVN alloy substrate and the wearing capacity was 67% of the substrate.