摘要
利用平板滑动摩擦实验研究了模具粗糙度、正压力以及滑动速度对合金化热镀锌板表面摩擦系数的影响规律,结合摩擦学理论对摩擦系数变化的原因进行深入的分析,采用光镜观察钢板摩擦后的截面形貌,对比不同实验条件下的锌层截面失效情况,进而验证摩擦系数变化规律的正确性。结果表明,模具粗糙度在0.4μm^1.2μm范围时,摩擦系数随着模具粗糙度的增加先减小后增大,模具粗糙度约0.8μm时最佳,此时锌层发生少量粉化失效;摩擦系数随着正压力增加而减小,在较高压力范围内减小的趋势变缓,随着正压力增加,锌层粉化与剥落失效加重;摩擦系数随着滑动速度增加而减小,当滑动速度增加到一定值时,摩擦系数减小的趋势变慢并趋于稳定,随着滑动速度增加,锌层粉化与剥落失效情况转好。
The flat sheet sliding friction test is carried out to respectively study the relationship between mold roughness,pressure,sliding velocity and surface friction coefficient of galvannealed sheet steel.Then combining with the tribology theory,the causes of surface friction coefficient changes are deeply analyzed.At last,the optical microscope is used to observe the frictional cross-section morphologies of the galvannealed sheet steels under different experimental conditions,and the cross section failure of zinc coating is analyzed to verify the mutative rules of surface friction coefficient.The results are as follows：When the mold roughness ranges from 0.4μm to 1.2μm,with the increase of mold roughness,the friction coefficient will increase at first and then decrease,and the best roughness is about 0.8μm.Meanwhile the zinc coating only appears a small amount of powdering.With the increase of pressure,the friction coefficient will decrease,and the decreasing tendency slows down in the higher pressure range.The powdering and flaking of zinc coating become serious with the increase of pressure.With the increase of sliding velocity,the friction coefficient will decrease.The decreasing tendency slows down and it becomes stable when the velocity increases to a certain value.The powdering and flaking of zinc coating get better with the increase of velocity.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2016年第2期87-91,114,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51275216)
关键词
合金化热镀锌板
摩擦系数
模具粗糙度
正压力
滑动速度
形貌
galvannealed sheet steel
friction coefficient
mold roughness
pressure
sliding velocity
morphology
