摘要
为提高农机刃具类零件的抗磨粒磨损性能,提出一种钎焊金刚石耐磨涂层制备方法,在Q235钢基体上制备了不同粒径及镀覆状态的金刚石耐磨涂层,并与65Mn钢的摩擦磨损和抗磨粒磨损性能进行对比。采用扫描电镜(SEM)对涂层表面、涂层与钢基体界面、涂层磨损后的表面微观形貌进行表征,并分析涂层的磨损规律及机理。结果表明:钎焊金刚石涂层与钢基体结合良好,金刚石在涂层中均匀分布,涂层厚度约370μm。钎焊金刚石涂层的耐磨性优于65Mn钢的,且随着金刚石粒径减小钎焊金刚石涂层的摩擦系数降低,涂层的耐磨性增大;钎焊镀钨金刚石涂层的抗摩擦磨损和磨粒磨损性能均高于钎焊未镀覆金刚石涂层的。
In order to improve the abrasive wear resistance of tool parts for agricultural machines,a preparation method of diamond wear-resistant coating based on brazing was proposed.The coatings were prepared on Q235 steel substrate with different particle sizes and plating states of diamond grits,the friction and anti-abrasive wear properties of brazed diamond coatings were studied comparing to 65Mn steel.Scanning electron microscopy (SEM) was used to characterize the microstructure of coating surface before and after wear test,and the interface between coatings and steel substrate.The wear law and mechanism of the coatings were also analyzed.The results showed that the brazed diamond coatings were bonded well with the steel matrix,and that the diamond grits were evenly distributed in the coatings with a thickness of about 370 μm.The wear resistance of brazed diamond coatings was better than that of 65Mn steel,and with the decrease of particle size of diamond grits,the friction coefficient decreased and the wear resistance increased.The friction and anti-abrasive wear resistance of brazed tungsten-plated diamond coatings were higher than those of brazed uncoated diamond coatings.
作者
曹忠溪
周玉梅
张凤林
张桂霞
骆少明
CAO Zhongxi;ZHOU Yumei;ZHANG Fenglin;ZHANG Guixia;LUO Shaoming(Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China;Guangdong University of Technology,Guangzhou 510006,China)
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2019年第3期93-101,共9页
Diamond & Abrasives Engineering
基金
广东省科技计划项目(2014A0202081305)
广东省教育厅特色创新项目(2018)
关键词
钎焊
金刚石
耐磨涂层
摩擦磨损
磨粒磨损
brazing
diamond
wear-resistant coating
friction wear
abrasive wear
