Monel合金表面激光熔覆镍基合金的组织及摩擦磨损性能  

Microstructure,friction and wear properties of Ni-based alloy coating on Monel alloy substrate by laser cladding

作　　者：张松[1] 周磊[1] 郝玉喜[1] 张春华[1] 王东生 王茂才 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110870 [2]沈阳金研激光再制造技术发展有限公司,沈阳110870

出　　处：《焊接学报》2013年第1期9-12,113,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51271126);辽宁省自然科学基金资助项目(20102168);沈阳市科技局攻关资助项目(F11-068-2-00)

摘　　要：利用激光熔覆技术在Monel 400合金表面制备了镍基合金改性层.采用扫描电镜、能谱仪、X射线衍射仪、显微硬度计及销—盘磨损试验机对镍基合金改性层的组织形貌、成分、结构、硬度及摩擦磨损性能进行了研究.结果表明,Monel合金表面镍基合金改性层的组织主要由γ-Ni固溶体、多元共晶体及一些初生沉淀相组成.选择优化的激光辐照工艺进行激光熔覆处理,可获得性能优异的镍基合金改性层,与Monel 400合金基材相比,镍基合金激光改性层的显微硬度是基体的7倍,摩擦系数明显降低,相对耐磨性提高了8.6倍.The Ni-based alloy modified coating was fabricated on Monel 400 alloy by laser cladding technology.The characteristics of microstructure and compositions of the laser deposited layer were studied by scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS) and X-ray diffraction(XRD).The microhardness,friction and wear properties were analyzed and tested by microhardness tester and pin-dish abrasion tester.The results show that the Ni-based alloys modified layer was mainly composed of γ-Ni solid solution,multi-eutectic and some primary precipitation phase.The Ni-based alloys modified layer with excellent performance can be obtained with the optimal laser processing parameter.The microhardness of the laser modified layer is 7 times as big as that of the substrate.The friction coefficient of the laser modified layer was significantly reduced and the relative wear resistance increased by 8.6 times.

关 键 词：激光熔覆 MONEL合金 镍基合金 组织 摩擦磨损 

分 类 号：TG144.44[一般工业技术—材料科学与工程]