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时效温度对Fe-Mn-Si-Cr-Ni-C合金形状记忆效应的影响 被引量:8

Effect of Aging Temperature on Shape Memory Effect of Fe-Mn-Si-Cr -Ni-C Alloy
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摘要 研究了时效温度对Fe - 1 4Mn - 5Si- 8Cr- 4Ni- 0 .2C记忆合金形状记忆效应 ,力学性能和显微组织的影响。结果表明 :合金的形状回复率随时效温度的升高而增加 ,在 1 2 2 3K时达到最大值 ,比固溶态提高了 6 8% ;随后形状回复率随时效温度的进一步升高而急剧下降。时效温度对合金硬度的影响与其对形状回复率的影响是一致的。能谱和波谱分析表明时效析出的第二相是富铬 ,富锰和富硅的 (Fe ,Mn ,Si,Cr) 3 C合金渗碳体 ,且其数量也随时效温度的升高而增加。但当温度高于 1 2 2 3K时 ,第二相粒子不能析出。通过时效强化奥氏体基体 ,可显著提高合金的形状记忆效应。 Theeffectsofagingtemperatureonshapememoryeffect ,mechanicalpropertiesandmicrostructureofFe - 1 4Mn - 5Si- 8Cr- 4Ni- 0 .2Cshapememoryalloyhavebeenstudied .Theresultsshowthattheshaperecoveryratiowillincreasewithincreasingagingtempera ture,whentheagingtemperatureisbelow 1 2 2 3K .Amaximumvaluecanbeobtainedat 1 2 2 3K ,whichishigher 6 8%thanthatofthespecimenassolution .Whenthetemperatureisover 1 2 2 3K ,theshaperecoveryratiowilldecreasesharply .Theenergyspectrumandspec trumanalysisshowthatthesecondphaseparticlesbyagingiscementiterichinchromium ,manganeseandsilicon .Whatismore ,theamountofsecondphaseparticleswillalsoincreasesastheagingtemperatureincreases,whentheagingtemperatureisbelow 1 2 2 3K .Thesecondphaseparticleswilldisappearwhenthetemperatureisover 1 2 2 3K .Shapememoryeffectinthetestedalloycanbeimprovedapprecia blythroughstrengtheningaustenitematrixbyaging .
出处 《功能材料》 EI CAS CSCD 北大核心 2000年第5期499-500,共2页 Journal of Functional Materials
基金 四川大学青年基金
关键词 形状记忆合金 形状回复率 时效 shapememoryalloy shaperecoveryratio aging
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