The present paper is based on the effect of heat treatment on the wear behavior of A357/cenosphere composites. The aluminum metal matrix composites were fabricated by the squeeze casting method. Both base alloy and composites are heat treated. The hardness of the matrix alloy and composites, both in as cast and heat-treated conditions, is measured by Vickers microhardness tester. The mechanical properties of the Al alloy/cenosphere composites got enhanced due to dispersion hardening, grain boundary strengthening and Orowan strengthening. The abrasive wear behavior was carried out on the composites using pin-on-disk wear tester with various operating parameters. The wear test results showed that the matrix alloy suffered higher wear rate than that of composites both in untreated and heat-treated conditions, depending on load.

本文基于热处理对A357 /平流层复合材料磨损行为的影响。铝金属基复合材料是通过挤压铸造法制备的。基础合金和复合材料均经过热处理。通过维氏显微硬度测试仪测量在铸造和热处理条件下的基体合金和复合材料的硬度。弥散硬化，晶界强化和Orowan强化提高了铝合金/空心球复合材料的力学性能。使用具有各种操作参数的销盘式磨损测试仪对复合材料进行了磨料磨损行为。磨损测试结果表明，根据载荷的不同，基体合金在未处理和热处理条件下的磨损率均高于复合材料。