研究了时效工艺对不同Cr含量Fe-Mn-Si-Cr-Ni-C合金形状记忆效应的影响,通过SEM分析了其微观组织变化.结果表明:Cr含量为12wt%的Fe-Mn-Si-Cr-Ni-C合金具有与Cr含量为8wt%的合金相当的形状记忆效应.直接时效时只有少量Cr23C6析出相在晶界和晶内析出.形变后时效不仅使得析出的Cr23C6数量更多,粒径更小,而且Cr23C6的析出具有方向性.形变时效后合金的形状回复率显著高于直接时效合金的形状回复率.
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