流变压铸与液态压铸成形AZ91D镁合金的摩擦磨损性能  

Friction and Wear Characteristics of AZ91D Magnesium Alloy Formed by Rheo-diecasting and Die Casting Process

作　　者：李东南[1] 范有发[1] 

机构地区：[1]福建工程学院材料科学与工程系,福建福州350014

出　　处：《铸造技术》2009年第7期880-883,共4页Foundry Technology

基　　金：福建省青年人才科技创新基金项目(2006F3004);福建省新建本科高校新世纪优秀人才支持计划资助(GY-R0803);福建省教育厅科技项目(JB06149)

摘　　要：采用MM-200型磨损试验机,研究了干滑动摩擦条件下液态压铸成形和流变压铸成形镁合金AZ91D的摩擦磨损性能。试验结果表明,流变压铸成形镁合金AZ91D的磨损速率和摩擦系数均比液态压铸成形试样的要高。两者的磨损速率和摩擦系数均随着载荷的增大而增大,当载荷增大到250 N之后,其磨损质量损失反而降低。随着磨损时间的增加,材料的磨损质量损失成线性比例迅速增加,摩擦系数则基本保持不变。对磨偶件的转速越高,压铸镁合金的磨损质量损失越大,摩擦系数越小。Using an MM-200 abrasion tester, the dry sliding friction and wear characteristics of AZ91D magnesium alloy, formed by rheo-diecasting and liquid die casting were studied in the paper. The results show that the wear rate and friction coefficient of magnesium alloy formed by rheodiecasting process are higher than that of magnesium alloy formed by liquid die casting process. The wear rate and friction coefficient of magnesium alloy is proportional to the load, but the wear loss mass reduces when the load arrives at 250 N. The wear loss of Mg alloy enhances in linearity proportion with load but the friction coefficient of Mg alloy does not change apparently. With increaseing the rotating speed, the weight loss of the alloy can be increased but the friction coefficient is decreased.

关 键 词：液态压铸 流变压铸 镁合金 摩擦磨损 

分 类 号：TG249.2[金属学及工艺—铸造]