通过搅拌铸造工艺制备体积分数为10%的SiC颗粒增强AZ91镁基复合材料。对复合材料依次进行了固溶、热变形和时效处理,研究了热处理对镁基复合材料组织和性能的影响。结果表明,铸态复合材料经固溶处理后,晶界处分布的大块Mg17Al12相消失,复合材料的强度和伸长率得到显著提高。热变形后,复合材料的晶粒细化,颗粒分布更加均匀,提高了复合材料的力学性能。经时效处理后,复合材料中析出弥散细小的Mg17Al12相,使热变形后复合材料的力学性能得到进一步提高。
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