第36卷第4期 北京科技大学学报 Vol.36 No.4 2014年4月 Journal of University of Science and Technology Beijing Apr.2014 激光熔覆WC/N60B复合涂层在水润滑滑动摩擦环 境下的磨损特性 陈华辉四，闫卓”，徐采云”，赵会友”，王振廷 1)中国矿业大学（北京）机电与信息工程学院材料科学与工程系，北京100083 2)黑龙江科技大学材料科学与工程学院，哈尔滨150022 ☒通信作者，E-mail:chh@cumtb.edu.cn 摘要采用激光熔覆技术制备了N6OB镍基合金涂层以及微米WC、纳米WC和微一纳米WC颗粒增强的N6OB基复合涂 层（分别称为WCm、WCn和WCmn复合涂层）.对制备涂层在Amsler2.O0磨损试验机上进行了不同载荷和滑动距离的水润滑 滑动磨损试验.结果表明：WC颗粒的加入显著提高了N60B涂层的耐磨性.WCm复合涂层和纳米WC复合涂层的耐磨性 差别不大，但磨损形貌不同.涂层在水润滑环境下的磨损量均远远低于干滑动摩擦，其原因是水膜的支撑或隔离作用降低了 涂层与磨轮之间的接触应力，水的冷却作用减少了摩擦热引起的温度升高，降低了涂层摩擦表面的温升和热软化。水润滑摩 损条件下，WCm和WCn复合涂层中过饱和W元素发生扩散和聚集. 关键词复合涂层：颗粒增强复合材料：激光熔覆：碳化钨：镍合金：水润滑：磨损 分类号TG174.445 Wear behavior of laser cladding WC/Ni60B composite coatings under water lubrication sliding condition CHEN Hua-hui》,YAN Zhuo'',XU Cai-yun》,ZHAO Hui-you》,WANG Zhen-+ing2》 1)Department of Materials Science and Engineering,School of Mechanical Electronic and Information Engineering,China University of Mining and Tech- nology (Beijing),Beijing 100083,China 2)School of Materials Science and Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China Corresponding author,E-mail:chh@cumtb.edu.cn ABSTRACT Ni60B nickel based alloy coatings and micro WC,nano WC and micro-nano WC particle reinforced Ni60B composite coatings were fabricated using laser cladding technology,hereinafter called as WCm,WCn and WCmn coatings,respectively.Sliding wear tests at different loads and sliding distances were conducted for the coatings using an Amsler200 tester under water lubrication con- ditions.The results show that the addition of WC particles can improve the wear resistance of Ni60B coatings and that the wear resist- ance of the WCm and WCn coatings does not presentan obvious difference,however their worn morphologiesare different.The wear re- sistance of the coatings is much better under water lubrication than dry sliding wear because the water lubrication film can play a sup- port or isolating action between the coatings and the wear wheel,which decreases their contact stress,and because water cooling to fric- tion couples decreases the temperature rising and the softening of the coatings.W element which is saturated in the WCn and WCm- coatings diffuses and agglomeratesduring water lubrication wear. KEY WORDS composite coatings:particle reinforced composites:laser cladding:tungsten carbide:nickel alloys:water lubrica- tion:wear 收稿日期：20130203 基金项目：国家自然科学基金资助项目(50471037)：中国国家自然科学基金与英国皇家学会合作基金资助项目(50711130223) DOI:10.13374/j.issn1001-053x.2014.04.010:http://journals.ustb.edu.cn第 36 卷 第 4 期 2014 年 4 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 36 No． 4 Apr． 2014 激光熔覆 WC /Ni60B 复合涂层在水润滑滑动摩擦环 境下的磨损特性 陈华辉1) ，闫 卓1) ，徐采云1) ，赵会友1) ，王振廷2) 1) 中国矿业大学( 北京) 机电与信息工程学院材料科学与工程系，北京 100083 2) 黑龙江科技大学材料科学与工程学院，哈尔滨 150022  通信作者，E-mail: chh@ cumtb． edu． cn 摘 要 采用激光熔覆技术制备了 Ni60B 镍基合金涂层以及微米 WC、纳米 WC 和微--纳米 WC 颗粒增强的 Ni60B 基复合涂 层( 分别称为 WCm、WCn 和 WCmn 复合涂层) ． 对制备涂层在 Amsler200 磨损试验机上进行了不同载荷和滑动距离的水润滑 滑动磨损试验． 结果表明: WC 颗粒的加入显著提高了 Ni60B 涂层的耐磨性． WCm 复合涂层和纳米 WCn 复合涂层的耐磨性 差别不大，但磨损形貌不同． 涂层在水润滑环境下的磨损量均远远低于干滑动摩擦，其原因是水膜的支撑或隔离作用降低了 涂层与磨轮之间的接触应力，水的冷却作用减少了摩擦热引起的温度升高，降低了涂层摩擦表面的温升和热软化． 水润滑摩 损条件下，WCm 和 WCn 复合涂层中过饱和 W 元素发生扩散和聚集． 关键词 复合涂层; 颗粒增强复合材料; 激光熔覆; 碳化钨; 镍合金; 水润滑; 磨损 分类号 TG174. 445 Wear behavior of laser cladding WC /Ni60B composite coatings under water lubrication sliding condition CHEN Hua-hui 1)  ，YAN Zhuo 1) ，XU Cai-yun1) ，ZHAO Hui-you1) ，WANG Zhen-ting2) 1) Department of Materials Science and Engineering，School of Mechanical Electronic and Information Engineering，China University of Mining and Tech￾nology ( Beijing) ，Beijing 100083，China 2) School of Materials Science and Engineering，Heilongjiang University of Science and Technology，Harbin 150022，China  Corresponding author，E-mail: chh@ cumtb． edu． cn ABSTＲACT Ni60B nickel based alloy coatings and micro WC，nano WC and micro-nano WC particle reinforced Ni60B composite coatings were fabricated using laser cladding technology，hereinafter called as WCm，WCn and WCmn coatings，respectively． Sliding wear tests at different loads and sliding distances were conducted for the coatings using an Amsler200 tester under water lubrication con￾ditions． The results show that the addition of WC particles can improve the wear resistance of Ni60B coatings and that the wear resist￾ance of the WCm and WCn coatings does not presentan obvious difference，however their worn morphologiesare different． The wear re￾sistance of the coatings is much better under water lubrication than dry sliding wear because the water lubrication film can play a sup￾port or isolating action between the coatings and the wear wheel，which decreases their contact stress，and because water cooling to fric￾tion couples decreases the temperature rising and the softening of the coatings． W element which is saturated in the WCn and WCm￾coatings diffuses and agglomeratesduring water lubrication wear． KEY WOＲDS composite coatings; particle reinforced composites; laser cladding; tungsten carbide; nickel alloys; water lubrica￾tion; wear 收稿日期: 2013--02--03 基金项目: 国家自然科学基金资助项目( 50471037) ; 中国国家自然科学基金与英国皇家学会合作基金资助项目( 50711130223) DOI: 10． 13374 /j． issn1001--053x． 2014． 04． 010; http: / /journals． ustb． edu． cn