时效时间对Fe-Mn-Si-Cr-Ni-C记忆合金回复应力的影响  

Effect of Aging Time on Recovery Stress of Fe-Mn-Si-Cr-Ni-C Shape Memory Alloy

作　　者：李宁[1] 文玉华[1] 陈孟诗[1] 涂铭旌[1] 李平全[2] 刘迎来[2] 马颖丽[2] 

机构地区：[1]四川大学材料成形与控制工程系,四川成都610065 [2]西安石油管材研究所,陕西西安710065

出　　处：《金属热处理》2000年第9期8-10,共3页Heat Treatment of Metals

基　　金：四川大学青年基金

摘　　要：本文研究了时效时间对Fe 1 4Mn 5Si 8Cr 4Ni 0 2C记忆合金回复应力的影响。实验结果表明 ,在 1 1 2 3K时效时 ,合金加热时产生的最大回复应力σh 随时效时间的增加而升高 ,在 30 0min时达到最大值 ,比固溶态提高了 1 0 2 % ;当时效时间大于30 0min后 ,时效时间的进一步增加对σh 没有影响。时效时间对合金加热后冷却到室温时回复应力σc 的影响规律与其对σh 的影响规律不同。σc 随时效时间的增加而增加 ,在 1 2 0min时达到最大值 ,比固溶态增加了 8MPa。当时效时间大于 1 80min后 ,σc将随时间的进一步增加而快速下降。The effect of aging time on the recovery stress of Fe-14Mn-5Si-8Cr-4Ni-0.2C shape memory alloy has been studied.The results show that the maximum recovery stress σ h in heating increases as the aging time increased.A maximum value can be attained at 300 minutes,which is higher 102% than that of the specimen as solution.When the time is longer than 300 minutes,the further increase in time has little effect on σ h.The effect of aging time on the recovery stress σ c at room temperature after heating differs from σ h.When the time is less than 180 minutes,the recovery stress σ c will increase with an increase in aging time,and reach the maximum value,which is higher 8MPa than that of the specimen as solution.When the time is longer than 180 minutes,σ c will decrease appreciably with the further increase in time.

关 键 词：时效时间 形状记忆合金 回复应力 

分 类 号：TG139.6[一般工业技术—材料科学与工程] TG156.92[金属学及工艺—合金]