锻压技术

5052铝合金塑性成形过程摩擦及磨损机理研究

英文标题：Study on friction and wear mechanism in plastic forming process for aluminum alloy 5052

作者：夏建生王鹏许宁张柱银武鹏王静文

单位：盐城工学院湖南工业大学

分类号：TG115.5

出版年,卷(期):页码：2018,43(4):124-130

摘要：

采用MPX-2000盘销式摩擦试验机，分别研究了边界润滑和干摩擦条件下滑动速度、界面载荷和滑动行程对5052铝合金与SKD11模具钢之间摩擦系数的影响。结果表明：当滑动速度在30.62~71.42 mm·s-1之间、界面载荷在0.51~2.55 MPa 之间时，干摩擦条件下的摩擦系数远高于边界润滑条件下的摩擦系数；边界润滑条件下，摩擦系数随着滑动速度和界面载荷的增加而减小，随着滑动速度和界面载荷的增大，摩擦系数减小的趋势放缓；干摩擦条件下，摩擦系数随着滑动速度的递增而减小，随着界面载荷的增加先增大后减小；两种润滑条件下，摩擦系数随滑动行程的变化规律均包含摩擦系数递增和稳定两个阶段。通过对试样微观形貌的观察分析，促进了对各种工艺条件下摩擦机理的认识。

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.

基金项目：

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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