研究了在300℃～350℃下、变形速率为5.6(10-3 s-1～1.8(10-2 s-1和挤压比为11:1条件下的热挤压,以及350℃下多道次的旋锻对ZM2和ZM5铸造合金的组织和室温拉伸性能的影响规律.结果表明:比之铸态组织,ZM2合金挤压态组织细化明显,晶粒为动态再结晶引起的等轴细晶,室温抗拉强度和延性都有显著升高.后续旋锻进一步使组织得到细化,强度升高而延性下降.变形ZM5合金显示出比T4处理态优异的室温拉伸性能.320(C下,随着挤压速率的增大,ZM5合金的σb和σ0.2 减小,δ增大;固定挤压速率为5.6(10-3 s-1时,升高挤压温度,ZM5合金的σb和σ0.2减小,而δ增加.
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