摘要
对42CrMo进行盐浴软氮化处理,分析盐浴软氮化处理对42CrMo试样硬度的影响,研究不同润滑条件下42CrMo试样的摩擦学性能,分析其摩擦磨损机制。结果表明:盐浴软氮化处理过的42CrMo的平均硬度为HV747.33,约是未处理基体的(HV310)的2.5倍;在其他条件相同时,随载荷的增加,干摩擦条件下42CrMo的摩擦因数先增加后减小,边界润滑和油润滑条件下的摩擦因数不断增加;42CrMo在干摩擦条件下的摩擦因数、表面磨痕深度和磨损量均要明显高于边界润滑和油润滑条件下;在干摩擦条件下42CrMo的磨损机制为严重的黏着磨损和塑性变形,边界润滑条件下42CrMo表面磨损减缓,有轻微犁沟;油润滑条件下42CrMo表面为磨粒磨损,无明显变形。
42CrMo was treated with soft nitriding salt bath process,and the effect of complex salt bath treatmenton hardness of 42CrMo was analyzed.The tribological characteristics of 42CrMo with complex salt bath treatment was studied under different lubrication conditions and load,and the mechanism of friction and wear.The results indicate that the average hardness of 42CrMo with soft nitriding salt bath treatment is increased from HV310 to HV747. 33,which is about 2. 5 times as much as the untreated alloy.With increase of load,the friction coefficient of 42CrMo under dry friction is increased first and then decreased,while they are increased constantly under boundary lubrication and oil lubrication.The friction coefficient,the depth of surface grinding crack and wearing capacity of 42CrMo under boundary lubrication and oil lubrication are decreased obviously compared with that under dry friction.The wear mechanism of 42CrMo is serious adhesion wear and plastic deformation under dry friction.The surface wear slow down under boundary condition,which only has a slight furrow,while the surface occurs abrasive wear and there is no obvious deformation under oil lubrication.
作者
李冰月
刘利国
柯学峰
胡飞
邹晓峰
LI Bingyue;LIU Liguo;KE Xuefeng;HU Fei;ZOU Xiaofei(School of Mechanical Engineering,Jiangnan University,Wuxi Jiangsu 214122,China;Wuxi Electromechanical Higher Vocational and Technical School,Wuxi Jiangsu 214028,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2018年第6期72-75,共4页
Lubrication Engineering
关键词
盐浴软氮化
42CrMo
摩擦学性能
soft nitriding salt bath
42CrMo
tribology characteristics
