电脉冲处理对预变形Fe13Mn6Si13Cr4Ni0.1C合金形状记忆效应及显微组织的影响

Effects of Electric Pulse Treatment on Shape Memory Effect and Microstructure in a Pre-deformation Fe13Mn6Si13Cr4Ni0.1C Alloy

摘要:

研究了电脉冲处理对预变形Fe13Mn6Si13Cr4Ni0.1C合金形状记忆效应及其显微组织的影响。结果表明：电脉冲处理能加速Cr和C原子的迁移及Cr23C6碳化物的析出，降低时效温度，缩短时效时间，并能诱发Cr23C6碳化物的形核。因此，与10%拉伸预变形后再973K，1073K时效的合金相比，10%拉伸预变形后300V，1100μf,1Hz电脉冲处理的Fe13Mn6Si13Cr4Ni0.1C合金，其形状回复率能在300s时间内从固溶态合金的32%提高到87.2%。

Abstract:

Effects of electric pulse treatment on shape memory effect and microstructure in a pre-deformation Fe13Mn6Si13Cr4Ni0.1C alloy were investigated. The results indicate that electric pulse treatment can accelerate migration of Cr and C atoms and precipitation of Cr23C6 carbides, lower ageing temperature, shorten ageing time and induce nucleation of Cr23C6 carbides. Therefore, the shape recovery ratio was improved to 87.2% from 32% of a water-quenching alloy within 300 s in a Fe13Mn6Si13Cr4Ni0.1C alloy by 300 V, 1100 μf, 1 Hz electric pulse treatment after 10% tensile pre-deformation compared to alloys aged at 973 K, 1073 K respectively following the same pre-deformation.