研究了T6处理工艺(T6工艺430℃,6 h+215℃,2h,空冷)对触变成形Mg2Sip/AM60B复合材料组织及力学性能的影响.结果表明:分布于晶间及晶内的硬脆β-Mg17Al12相在T4处理工艺:(T4工.艺430℃×6h,水冷)后几乎全部溶解,由此引起的β相割裂作用的基本消失,固溶强化作用及成分均匀化等导致抗拉强度和伸长率明显提高,而硬度显著降低;T6处理后,非连续析出β相在晶界及Mg2Si/α-Mg界面处呈现细小弥散分布,引起较强的晶界钉扎作用,导致抗拉强度和硬度显著提高,而伸长率略微降低,此状态下未发现明显的连续析出β相.最佳的T6处理工艺为(430 ℃,6 h+215℃,2h),且抗拉强度和伸长率达到290 MPa和14.37％,相比触变态复合材料分别提高40.10％和83.06％.复合材料的断裂方式由触变态的沿晶断裂依次转变为T4态的混合断裂和T6态的穿晶断裂.
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