(1. 江苏科技大学 先进焊接技术省级重点实验室，镇江 212003；
2. Advanced Materials Division, Korea Institute of Machinery and Materials, Changwon 641-010, Korea)
摘 要:
研究分析热处理工艺对A356/SiCp复合材料的硬度、导电率及微观组织的影响，在此基础上研究复合材料的干滑动摩擦磨损特性。结果表明：固溶和T6热处理可显著提高复合材料的硬度，但降低导电率，而低温退火却比较显著地提高导电率；导电率高的低温退火态磨损特性基本与铸态一致，固溶处理及时效处理虽可有效提高硬度，但不提高耐磨性能，这表明T6热处理是否作为制动盘材料时的最佳热处理工艺，有待进一步研究；复合材料的磨损率随载荷的增加而增加，但低载荷时增加缓慢，高载荷时增加迅速；摩擦因数随着热处理工艺而变化，但对载荷变化不敏感，都在较小的范围内波动，基本是稳定的。
关键字: Al/SiCp；复合材料；干摩擦；热处理；摩擦磨损特性
（1.Provincial Key Laboratory of Advanced Welding Technology, Jiangsu University of Science and Technology; Zhenjiang 212003, China;
2. Advanced Materials Division, Korea Institute of Machinery and Materials, Changwon 641-010, Korea）
Abstract:The effects of different heat treatments on hardness, electric conductivity and microstructure of A356/SiCp composite were investigated. In addition, the dry sliding frictional wear characteristics were also studied. The composite’s hardness increases markedly after solid solution and T6 treatment while the conductivity reduces, and the conductivity increases markedly after the low temperature annealing. The wear experiment results show that the wear characteristic of casting composite is in good agreement with the low temperature annealing composite. The hardness increases effectively after solid solution and aging treatment while the wear resistant performance reduces. The wear rate of A356/SiCp composite increases with the increase of the applied load, under the lower load, and the wear rate increases slowly with load increasing, while under the higher load the wear rate increases quickly; the friction coefficient varies with heat treatment process and has no sensitivity to load, which varies in little range and appears stability.
Key words: Al/SiCp; composite; dry friction; heat treatment; friction and wear characteristic
