铁路机车球阀复合涂层的制备与性能  

Preparation and Properties of Composite Coating on Ball Valve for Railway Locomotive

作　　者：杨贞[1] 田治泰 赵锦龙[2] YANG Zhen;TIAN Zhitai;ZHAO Jinglong(Baotou Railway Vocational & Technical College, Baotou Inner Mongolia 014060,China;Inner Mongolia University of Technology, Huhehot Inner Mongolia 010051, China)

机构地区：[1]包头铁道职业技术学院,内蒙古包头014040 [2]内蒙古工业大学,内蒙古呼和浩特010051

出　　处：《上海金属》2021年第6期52-58,共7页Shanghai Metals

基　　金：内蒙古自治区教育科学研究“十三五”规划2019年度立项课题(NZJGH2019166)。

摘　　要：采用氧-乙炔火焰喷焊和多弧离子镀在不锈钢球阀表面制备Ni60(WC)-CrN复合涂层。采用扫描电子显微镜、X射线衍射仪、维氏硬度计、摩擦磨损试验机和电化学工作站等分析了涂层的表面形貌、物相组成及耐磨和耐蚀性能。结果表明:Ni60(WC)-CrN复合涂层与304不锈钢基体结合良好,界面无明显裂纹或孔洞等缺陷;Ni60(WC)-CrN涂层的硬度高于Ni60(WC)涂层;在相同试验力下,Ni60(WC)-CrN涂层的摩擦因数小于Ni60(WC)涂层,涂层磨损量大小顺序为Ni60(8%WC)>Ni60(16%WC)>Ni60(8%WC)-CrN>Ni60(16%WC)-CrN,涂层耐蚀性能优劣顺序为Ni60(8%WC)-CrN>Ni60(16%WC)-CrN>Ni60(16%WC)>Ni60(8%WC)。Ni60(8%WC)-CrN复合涂层的耐磨和耐蚀性能最佳。Ni60(WC)-CrN composite coatings were prepared on the stainless steel ball valve by oxygen-acetylene flame spray welding and multi-arc ion plating.The surface morphology,phase composition,wear resistance and corrosion resistance of the coatings were analyzed by scanning electron microscope,X-ray diffractometer,hardness tester,friction-wear tester and electrochemical workstation.The results showed that(a)the Ni60(WC)-CrN composite coating was bonded well to the 304 stainless steel substrate,and there was no obvious crack or hole at the interface;(b)the hardness of Ni60(WC)-CrN coating was higher than that of Ni60(WC)coating;and(c)the friction coefficient of Ni60(WC)-CrN coating was lower than that of Ni60(WC)coating under the same test force,the wear amount of coating was in the order of Ni60(8%WC)>Ni60(16%WC)>Ni60(8%WC)-CrN>Ni60(16%WC)-CrN,and the corrosion resistance was in the order of Ni60(8%WC)-CrN>Ni60(16%WC)-CrN>Ni60(16%WC)>Ni60(8%WC)coating.The Ni60(8%WC)-CrN composite coating exhibited the best wear resistance and corrosion resistance.

关 键 词：WC CRN 复合涂层 耐磨性 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]