中国机械工程 ›› 2010, Vol. 21 ›› Issue (13): 1536-1541.

• 机械基础工程 • 上一篇    下一篇

AS41镁合金在不同温度的摩擦学行为

黄伟九1,3;林强1;郭源君2;张小彬1
  

  1. 1.重庆理工大学,重庆,400050
    2.湖南科技大学,湘潭,411201
    3.汽车零部件制造及检测技术教育部重点实验室,重庆,400050
  • 出版日期:2010-07-10 发布日期:2010-07-15
  • 基金资助:
    重庆市自然科学基金重点资助项目(CSTC2008BA4037,CSTC2010BB) 
    Key Program of Natural Science Foundation of Chongqing(No. CSTC2008BA4037,CSTC2010BB)

Tribological Performance of AS41 Magnesium Alloy under Different Temperatures

Huang Weijiu1,3;Lin Qiang1;Guo Yuanjun2;Zhang Xiaobin1
  

  1. 1.Chongqing University of Technology, Chongqing, 400050
    2.Hunan University of Science and Technology, Xiangtan,Hunan, 411201
    3.Key Laboratory of Manufacture and Test Techniques for Automobile Parts, Ministry of Education, Chongqing, 400050
  • Online:2010-07-10 Published:2010-07-15
  • Supported by:
     
    Key Program of Natural Science 
    Foundation of Chongqing(No. CSTC2008BA4037,CSTC2010BB)

摘要:

研究了AS41镁合金在不同温度时的力学和摩擦学性能及摩擦学机理。研究结果表明:随着试验温度升高,AS41镁合金的抗拉强度和屈服强度降低、延伸率增大;当温度超过150℃时,抗拉强度和屈服强度显著下降。随着载荷增大,不同试验温度的摩擦因数均呈减小趋势,而磨损率则呈增大趋势;随着滑动速度增大,不同试验温度的摩擦因数变化不大,而磨损率则呈增大趋势。在不同载荷和滑动速度下,均呈现试验温度越高,摩擦因数越小,磨损率越大的现象;在试验温度较高时,导致磨损机制由轻微磨损向严重磨损转换的载荷减小。在载荷为50N时,不同温度AS41镁合金的磨损机理分别是:室温时主要为氧化磨损和磨粒磨损,150时为剥层磨损和黏着磨损,而200℃时主要为材料塑性变形引起的熔融磨损。

关键词:

Abstract:

The mechanical and tribological properties and wear mechanism of AS41 magnesium alloy under different experimental temperatures were investigated herein. The results show that the ultimate strength and yield strength of AS41 magnesium alloy decrease with increasing of experimental temperature, whereas the elongation increases with experimental temperature increasing. In particular, the ultimate strength and yield strength prominently decrease, when the experimental temperature exceedes 150. With increasing the load, the frictional coefficient and wear rate display the decline and uptrend respectively under different experimental temperatures, and with increasing of sliding velocity, the frictional coefficient displayes a few change, whereas the wear rate shows an ascending trend. Under the different loads and sliding velocities, the higher the experimental temperature, the lower the frictional coefficient, but the higher the wear rate. The loads, which are the transition spots from mild wear to severe wear, brought down with the increasing of experimental temperature. The wear mechanism of AS41 magnesium alloy under a load of 50N and different experimental temperatures are presented as follows, the dominant wear mechanism in room temperature is oxidation wear and abrasive wear, the delamination wear and adhesion wear are the dominant wear mechanisms for 150, whereas the melting wear is the dominant wear mechanisms for the experimental temperature of 200 respectively.

 

Key words: AS41 magnesium alloy, experimental temperature, friction coefficient, wear rate, wear mechanism

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