寻丹,罗俊鹏,张浩,胡可,李克,张梅,顾剑锋,李传维

• 1:中国航发南方工业有限公司
• 2:上海交通大学材料科学与工程学院
• 3:上海市激光制造与材料改性重点实验室

摘要(Abstract)：

采用淬火相变膨胀仪研究了13Cr15Ni4Mo3N半奥氏体沉淀硬化不锈钢连续冷却过程的相变动力学行为。用改进的K-M方程准确描述了马氏体相变量与温度的关系。结果表明：实验钢的特征温度A_(c1)和A_(c3)分别为600和720℃;1040℃奥氏体化后以任意冷速冷却仅发生马氏体相变，冷速为100℃/s时测得的马氏体相变开始温度M_s为99℃,相变结束温度M_f为-75℃。在冷速≥1℃/s时，晶格膨胀法和杠杆法计算得到的马氏体相变量结果相近，而冷速<1℃/s时，晶格膨胀法计算得到的马氏体转变量大于杠杆法计算得到的马氏体转变量。在相变动力学参数α取值0.03258时，K-M方程可简单方便地描述实验钢的马氏体相变动力学过程，但对相变初期的转变量预测精度较低；改进的K-M方程在考虑α随温度变化时，可较准确地预测马氏体转变量。

关键词(KeyWords)： 13Cr15Ni4Mo3N;沉淀硬化不锈钢;连续冷却;相变动力学;K-M方程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(No.52171042)

作者(Author): 寻丹,罗俊鹏,张浩,胡可,李克,张梅,顾剑锋,李传维

DOI: 10.13289/j.issn.1009-6264.2023-0347

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