GCr15表面涂层与织构复合摩擦改性方法研究  

Research on composite friction modification method of GCr15 surface coating and texture

作　　者：陈书童 王文华 丛建臣 袁伟 郭前建[1] 朱帅伦 于洁[1] CHEN Shutong;WANG Wenhua;CONG Jianchen;YUAN Wei;GUO Qianjian;ZHU Shuailun;YU Jie(School of Mechanical Engineering,Shandong University of Technology,Zibo 255049,China;Tianrun Industrial Technology Co.,Ltd.,Weihai 264200,China)

机构地区：[1]山东理工大学机械工程学院,淄博255049 [2]天润工业技术股份有限公司,威海264200

出　　处：《现代制造工程》2023年第5期1-5,共5页Modern Manufacturing Engineering

基　　金：中国博士后科学基金面上资助项目(2022M712393);山东省重点研发计划项目(2019GGX104081,2019GGX104033);国家自然科学基金项目(51805299);山东省教育厅青创人才引育计划项目。

摘　　要：研究了表面涂层-织构复合改性对GCr15材料零件高速运转条件下摩擦磨损性能的影响及其减摩机理。首先在GCr15表面热喷涂厚度约30μm的巴氏合金涂层,然后采用皮秒光纤激光器在涂层表面加工凹坑织构。采用球-盘摩擦磨损试验机对改性表面进行摩擦学测试,球试样和盘试样基体材料同为GCr15。研究发现,复合改性处理后GCr15盘试样表面微织构的毛刺硬度有所降低,与未经过复合改性处理的试件相比,复合改性表面的平均摩擦系数与体积磨损率明显降低;磨损检测结果显示复合改性表面试样产生的磨粒明显减少,磨损区域边界的塑性流动与磨粒磨损情况得到显著改善。GCr15材料表面经过复合改性处理后,织构加工质量和颗粒捕捉能力有了明显提高,从而使复合改性表面的摩擦学性能得到增强。The effect of surface coating-texturing composite modification on friction and wear properties of GCr15 bearing steel under high-speed operation and its anti-friction mechanism were studied.First,thermal spraying was performed on GCr15 surface with a thickness of about 30μm babbitt coating,and then the pitted texture was processed on the coating surface by picosecond fiber laser.The tribological test of the modified surface was carried out with a ball-on-disc wear tester.The base materials of ball and disk sample were the same as GCr15,it was found that the burr hardness of the surface micro texture of GCr15 disc specimen after composite modification decreased.Compared with the specimen without composite modification,the average friction coefficient and volume wear rate of the composite modified surface decreased significantly;wear test results showed that the wear particles produced by the composite modified surface samples were reduced significantly,and the plastic flow and abrasive wear at the boundary of wear area were improved significantly.After surface modification of GCr15,the texture processing quality and particle capture ability have been improved significantly,thus enhancing the tribological properties of the composite modified surface.

关 键 词：涂层 激光表面加工 微织构 摩擦性能 复合改性 

分 类 号：TH117.1[机械工程—机械设计及理论]