低碳钢表面钨极氩弧堆焊多元合金粉末涂层组织与耐磨性能研究  

Research on Microstructure and Wear Resistance of Multicomponent Alloy Powder Coating on Low Steel Enhanced by Tungsten Arc Welding

作　　者：季业益[1] 陆宝山[1,2] 孙书娟[3] 李有智[1] 李强伟 JI Yeyi;LU Baoshan;SUN Shujuan;LI Youzhi;LI Qiangwei(Department of Precision Manufacturing Engineering,Suzhou Institute of Industrial Technology,Suzhou 215104,China;School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China;Suzhou Institute of Construction ＆ Communications of Higher Occupation Technique School,Suzhou 215124,China;Engineering Training Centre,Suzlaou University,Suzhou 215123,China)

机构地区：[1]苏州工业职业技术学院精密制造工程系,江苏苏州215104 [2]江苏大学材料科学与工程学院,江苏镇江212013 [3]苏州建设交通高等职业技术学校,江苏苏州215124 [4]苏州大学工程训练中心,江苏苏州215123

出　　处：《铸造技术》2018年第9期2129-2132,2137,共5页Foundry Technology

基　　金：江苏高校品牌专业建设工程资助项目(PPZY2015B186);江苏省高等职业院校高级访问工程师计划资助项目(2015FG038)

摘　　要：利用钨极氩弧焊接将AlCrNiMoFeSi多元合金粉末堆焊在20钢表面,研究多元合金粉末涂层的微观组织、强化相与硬度,并在回转式磨损试验机上进行销盘线接触磨损试验,评估多元合金表面涂层的耐磨性能。结果表明,多元合金涂层的显微组织主要由枝晶FeMoSi和枝晶间BCC结构组成。FeMoSi枝晶通过抵抗微切削提高耐磨性,BCC结构通过阻断裂纹扩展提高耐磨性。在高速滑动过程中,涂层表面易形成氧化膜,改善了表面摩擦条件,使表面的磨损量显著下降。The AICrNiMoFeSi multicomponent alloy powder was deposited on the surface of 20 steel by tungsten arc welding. The microstucture, strengthening phase and hardness of coating were discussed. The pin-on-disc wear test was carded out on the rotary wear tester to evaluate the wear resistance of the multicomponent alloy coating. The results show that the microstructure of the multicomponent alloy coating is mainly composed of dendritic FeMoSi primary phase and interdendritic BCC phase. The dendrites FeMoSi phase help to enhance the wear resistance by resisting microcutting, while the BCC structure enhances wear resistance by interdicting crack propagation during the wear process. When the surface of coating is sliding at high speed, its surface is easy to form oxide film, which improve the friction condition of the surface and the surface wear quantity decrease significantly.

关 键 词：钨极氩弧焊 多元合金粉末 显微组织 耐磨性能 

分 类 号：TG457[金属学及工艺—焊接] TG113