Ni-C自润滑涂层重载下摩擦磨损行为  

Friction and Wear Behavior of Ni-C Self-lubricating Coating under Heavy Load

作　　者：孙艺闻 柳琪 詹华[2] 李振东[2] 鲍曼雨[2] 王玉[1] 刘娜 汪瑞军[2] 白宇[1] Sun Yiwen;Liu Qi;Zhan Hua;Li Zhendong;Bao Manyu;WangYu;Liu Na;Wang Ruijun;Bai Yu(State Key Laboratory for Strength of Metallic Materials,Xi'an Jiaotong University,Xi'an 710049,China;Beijing Jinlukuntian Special Machine Co.,Ltd.,Beijing 100083,China)

机构地区：[1]西安交通大学金属材料强度国家重点实验室,西安710049 [2]北京金轮坤天特种机械有限公司,北京100083

出　　处：《粘接》2021年第9期63-66,86,共5页Adhesion

基　　金：国家重点研发计划(No.2018YFB2004004);国家自然科学基金(No.52005388);中国博士后科学基金(No.2019M653598)。

摘　　要：文章采用有限元模拟方法,并结合销盘式摩擦磨损实验,深入研究镍-石墨(Ni-C)固体自润滑涂层在干摩擦环境下与镍铬-碳化铬(NiCr-Cr3C2)硬质材料对磨下的摩擦磨损行为。模拟与实验结果表明,随外界载荷的升高,涂层塑性变形量及其表面温度不断增大;当外界载荷为52MPa时,Ni-C涂层表面形成连续稳定的石墨润滑层,使得摩擦系数最低降至0.2左右;当外界载荷增大至109MPa时,塑性变形量和摩擦系数显著增大,最终导致涂层断裂与脱落失效。This paper adopts the finite element simulation method,combined with the pin-disc friction and wear experiment,in-depth study of the friction and wear behavior of nickel-graphite(Ni-C)solid self-lubricating coatings and nickel-chromium-chromium carbide(NiCr-Cr3C2)hard materials under dry friction.The simulation and experimental results show that the plastic deformation and surface temperature of the coating increase with the increase of external load;when the external load is 52 MPa,a continuous and stable graphite lubricating layer is formed on the surface of the Ni-C coating,which reduces the friction coefficient to about 0.2;when the load is increased to 109 MPa,the friction coefficient and plastic deformation increase significantly,which eventually leads to the failure of the coating to break and fall off.

关 键 词：自润滑 镍-石墨 涂层 重载 模拟仿真 

分 类 号：TH117.1[机械工程—机械设计及理论]