铌对液压支架立柱等离子熔敷涂层组织性能的影响  

Effects of Nb on microstructure and properties of plasma deposited layer on hydraulic support piston rod

作　　者：丁卫东[1] 栗卓新[1] 李国栋[1] 李杨 

机构地区：[1]北京工业大学材料科学与工程学院,100024 [2]菲拉克焊接江苏有限公司,常州市213245

出　　处：《焊接》2015年第11期40-44,71,共5页Welding & Joining

基　　金：哈尔滨工业大学先进焊接与连接国家重点实验室(AWJM13-01)

摘　　要：采用自制药芯焊丝等离子熔敷技术在液压支架立柱表面制备一种耐磨耐腐蚀的铁基合金涂层,合金体系为Cr-Ni-Mo-B-Nb。通过对比涂层的显微硬度、磨料磨损试验、盐雾试验,研究合金元素铌对涂层显微组织结构、显微硬度、耐磨性、耐蚀性的影响。试验结果表明,随着铌含量的增加,熔敷层显微硬度与耐磨性均先增大后减小,N2号平均显微硬度最大为436 HV20,磨损量最小为0.226 28 g,盐雾腐蚀后无腐蚀点,耐腐蚀性优良,适合液压支架立柱工矿的使用要求。The wear and corrosion resistant Fe- based coating was prepared by plasma cladding on hydraulic support piston rod surface,and its alloy system is Cr- Ni- Mo- B- Nb.By testing coating microhardness,abrasive wear test,salt spray test,the effects of Nb on the microstructure,microhardness,wear resistance and corrosion resistance were studied.The results showed that with the increase of Nb,microstructure and wear resistance increase first,and then decrease.The coating with No.N2 wire has the maximum microhardness(436 HV20),the minimum wear loss(0.226 28 g),and has no corrosion- points after salt spray test.Finally it meets the demands of hydraulic support piston rod.

关 键 词：等离子熔敷 液压支架立柱 铌 

分 类 号：TG422.3[金属学及工艺—焊接]