金属热处理 ›› 2022, Vol. 47 ›› Issue (1): 7-12.DOI: 10.13251/j.issn.0254-6051.2022.01.002

• 专栏 • 上一篇    下一篇

Fe-15Mn-4.5Si-10Cr-5Ni系形状记忆合金中Cr23C6的析出行为

李佳蕊, 杨忠民, 赵锴, 陈颖, 曹燕光, 李昭东   

  1. 钢铁研究总院 工程用钢研究院, 北京 100081
  • 收稿日期:2021-09-20 修回日期:2021-10-25 出版日期:2022-01-25 发布日期:2022-02-18
  • 通讯作者: 杨忠民,博士,正高级工程师,E-mail:yangzm2005@126.com
  • 作者简介:李佳蕊(1997—),女,硕士研究生,主要研究方向为建筑工程用钢,E-mail:898775172@qq.com。
  • 基金资助:
    国家重点研发计划(2017YFB0304700,2017YFB0304702)

Kinetics of chromium carbide precipitated in austenitic matrix of Fe-15Mn-4.5Si-10Cr-5Ni shape memory alloys

Li Jiarui, Yang Zhongmin, Zhao Kai, Chen Ying, Cao Yanguang, Li Zhaodong   

  1. Research Institute of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China
  • Received:2021-09-20 Revised:2021-10-25 Online:2022-01-25 Published:2022-02-18

摘要: 第二相粒子Cr23C6作为Fe-15Mn-4.5Si-10Cr-5Ni系形状记忆合金中奥氏体主要强化相,对形状记忆性能起到重要影响。根据经典晶界形核长大动力学理论,分析解决包括Cr23C6相变化学自由能、界面能等一系列相关参量的理论计算及关键参数选择原则等问题。提出了Cr23C6在Fe-15Mn-4.5Si-10Cr-5Ni系形状记合金奥氏体基体中沉淀析出的相对定量理论计算方法,计算结果和试验结果吻合较好。计算出的PTT曲线(沉淀量-温度-时间曲线)可以作为Fe-15Mn-4.5Si-10Cr-5Ni系形状记忆合金时效处理参数选择的理论依据。

关键词: 形状记忆合金, Cr23C6, PTT曲线, 理论计算

Abstract: As the main strengthening phase of austenite in Fe-15Mn-4.5Si-10Cr-5Ni shape memory alloy, the second phase particle Cr23C6 plays an important role in the shape memory properties. According to the classical grain boundary nucleation kinetics theory, the theoretical calculation of a series of related parameters including phase transition chemical free energy and interface energy of Cr23C6 and the selection principle of key parameters are analyzed and solved. This study proposes a relative quantitative theoretical method for calculating the precipitation of Cr23C6 in the austenitic matrix of Fe-15Mn-4.5Si-10Cr-5Ni shape memory alloys, that produces results consistent with experimental results. The calculated PTT curve (precipitation-temperature-time curve) can be used as a theoretical basis for the selection of aging treatment parameters of Fe-15Mn-4.5Si-10Cr-5Ni shape memory alloys.

Key words: shape memory alloys, Cr23C6, PTT curve, theoretical calculation

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