锰白铜合金/W_2C复合涂层磨损机制研究  

Study on the Wear Mechanism of Cu-20Ni-20Mn Alloy/W_2C Composite Coatings

作　　者：马红玉[1] 王镇全[1] 张嗣伟[1] 王德国[1] 

机构地区：[1]中国石油大学(北京)机电工程学院,北京102200

出　　处：《润滑与密封》2010年第3期5-10,45,共7页Lubrication Engineering

基　　金：高等学校博士学科点专项科研基金资助项目(20020425005)

摘　　要：采用无压浸渍工艺,在45#钢表面制备出2种锰白铜合金/W2C复合涂层;考察了比压、转速及W2C颗粒尺寸对涂层与石油钻机的一种新型刹车材料对磨的耐磨性的影响,并分析了涂层的磨损过程与磨损机制。结果表明:涂层的磨损机制是W2C颗粒的疲劳磨损以及摩擦表面氧化锰薄膜和表面膜的生成、长大、破裂(撕裂)、剥落、再生的动态磨损过程,也是磨粒磨损、疲劳磨损、黏着磨损、塑性变形和氧化磨损等磨损机制的综合作用。Two types of Cu-20Ni-20Mn Alloy-W2C composite coatings different in the particle size of W2C were prepared on a substrate of 45 steel using non-pressure dipping technique.The effects of contact pressure,rotating speed and particle size of W2C on the wear resistance of the coatings sliding against a new type of brake-block materials for drilling rigs＇ disc brake were investigated respectively,and the wear mechanism and wear process of the coatings was analyzed.The results show that the wear mechanism of the coatings is the fatigue wear of W2C particles and a dynamic wear process of Mn oxide layer and surface layer from growth,detachment to re-growth,and is also a comprehensive action of abrasive wear,fatigue wear,adhesive wear,plastic deformation and oxidative wear.

关 键 词：锰白铜合金 W2C粒度 无压浸渍 磨损机制 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TH117.1[金属学及工艺—金属学]