Transactions of Materials and Heat Treatment

Title：Study on friction and wear mechanism in plastic forming process for aluminum alloy 5052

Authors： Xia Jiansheng Wang Peng Xu Ning Zhang Zhuyin Wu Peng Wang Jingwen

Unit： Yancheng Institute of Technology Hunan University of Technology

KeyWords： boundary lubrication dry friction sliding velocity interface load sliding stroke friction coefficient microtopography wear mechanism

ClassificationCode：TG115.5

year,vol(issue):pagenumber：2018,43(4):124-130

Abstract：

Under the boundary lubrication and dry friction conditions respectively, the influences of sliding velocity，interface load and sliding stroke on the friction coefficient between aluminum alloy 5052 and die steel SKD11 were studied by MPX-2000 disc-pin friction tester. The results show that when the sliding speed is between 30.62-71.42 mm·s-1 and the interface load is between 0.51-2.55 MPa, the friction coefficient under the dry friction condition is higher than that under the boundary lubrication condition. Under the boundary lubrication condition, the friction coefficient values generally decrease with the increasing of sliding velocity and interface load, and the decreasing tendency slows down. However, under the dry friction condition, the friction coefficient values decrease with the increasing of sliding velocity, and increase first and then decrease with the increasing of interface load. Thus, the rules of friction coefficients changing with sliding stroke under both conditions include two stages, namely, increasing stage and stable stage. Furthermore, the understanding of friction mechanisms under different process conditions is improved by observing and analyzing the microtopography of specimens.

Funds：

国家自然科学基金资助项目（51505408）；江苏省产学研前瞻性联合研究项目（BY2016065-37）

夏建生（1980-），男，博士，副教授；E-mail：Xiajiansheng@163.com；通讯作者：许宁（1964-），男，博士，教授，博士生导师；E-mail：xuning196402@163.com

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