引用本文:刘吉良,廖日东,罗军,廖斌,吴先映,刘庆义,黄鹏.20CrMo上沉积CrN涂层的力学性能及5W/40润滑下的摩擦学性能[J].中国表面工程,2017,30(6):103~110
LIU Ji-liang,LIAO Ri-dong,LUO Jun,LIAO Bin,WU Xian-ying,LIU Qing-yi,HUANG Peng.Mechanical Properties of CrN Coating on 20CrMo and Its Tribological Properties Under 5W/40 Oil[J].China Surface Engineering,2017,30(6):103~110
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20CrMo上沉积CrN涂层的力学性能及5W/40润滑下的摩擦学性能
刘吉良1, 廖日东1, 罗军2, 廖斌3, 吴先映3, 刘庆义4, 黄鹏4
1.北京理工大学 机械与车辆学院,北京 100081;2.北京市辐射中心,北京 100875;3.北京师范大学 核科学与技术学院,北京 100875;4.潍柴动力股份有限公司 内燃机可靠性国家重点实验室,山东 潍坊 261001
摘要:
在活塞销材料（20CrMo）上沉积了5种不同厚度的CrN涂层，研究其力学性能及发动机油5W/40润滑下的摩擦学性能。分别对CrN涂层的表面形貌、截面厚度、硬度、弹性模量和高温膜基结合性能进行了测试。探讨了不同接触压力和不同转速下CrN涂层与锡青铜（QSn7-0.2）配副以及基材20CrMo与QSn7-0.2配副在5W/40润滑下的摩擦学性能差异，并分析了接触电阻。结果表明：涂层沉积厚度对CrN涂层的硬度等力学参数的影响较小，但对高温膜基结合性能的影响较大。在5W/40润滑下，CrN涂层与QSn7-0.2配副在接触压力较大或较小的大部分区域都具有相对较低的摩擦因数，且磨损体积极小。
关键词:  活塞销  CrN涂层  力学性能  摩擦学性能
DOI：10.11933/j.issn.1007-9289.20170714001
分类号:
基金项目:内燃机可靠性国家重点实验室开放基金（SKLER-201607）
Mechanical Properties of CrN Coating on 20CrMo and Its Tribological Properties Under 5W/40 Oil
LIU Ji-liang1, LIAO Ri-dong1, LUO Jun2, LIAO Bin3, WU Xian-ying3, LIU Qing-yi4, HUANG Peng4
1.School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081;2.Beijing Radiation Center, Beijing 100875;3.College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875;4.State Key Laboratory of Engine Reliability, Weichai Power Co., Ltd., Weifang 261001, Shandong
Abstract:
Five CrN coatings with different thickness were deposited on the 20CrMo of piston pin material. The mechanical properties and tribological properties under the engine oil 5W/40 lubrication were studied. The surface morphologies, section thickness, hardness and the elastic modulus and high temperature adhesion strength of the CrN coatings were tested. The differences in the tribological properties of the CrN coating against the tin bronze (QSn7-0.2) and the 20CrMo substrate against the QSn7-0.2 were investigated under the 5W/40 oil as well as under different contact pressures and sliding speeds, respectively. The contact resistance was analyzed as well. The results indicate that the thickness of CrN coating has slight impact on the hardness and other mechanical parameters. In contrast, the high temperature adhesion properties are highly affected. The CrN coating against the QSn7-0.2 exhibits lower friction coefficient in most areas of higher or lower contact pressure and the wear volume is minimal under the 5W/40 oil.
Key words:  piston pin  CrN coating  mechanical properties  tribological properties
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