东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (8): 1084-1087.DOI: 10.12068/j.issn.1005-3026.2017.08.005

• 材料与冶金 • 上一篇    下一篇

奥氏体化温度对Fe-17Mn-0.05C钢组织和拉伸性能的影响

李兴， 陈礼清   

  1. (东北大学 轧制技术及连轧自动化国家重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2016-03-07 修回日期:2016-03-07 出版日期:2017-08-15 发布日期:2017-08-12
  • 通讯作者: 李兴
  • 作者简介:李兴(1990-)，男，安徽合肥人，东北大学博士研究生； 陈礼清(1965-)，男，安徽安庆人，东北大学教授，博士生导师.
  • 基金资助:
    辽宁省教育厅科学技术研究项目(L20150168).

Effect of Austenitizing Temperature on the Microstructure and Tensile Properties of Fe-17Mn-0.05C Steel

LI Xing， CHEN Li-qing   

  1. State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.
  • Received:2016-03-07 Revised:2016-03-07 Online:2017-08-15 Published:2017-08-12
  • Contact: CHEN Li-qing
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摘要： 对一种热轧态高锰减振结构钢进行不同温度的热处理，研究了奥氏体化温度对其组织和拉伸性能的影响.结果表明:在600℃条件下，逆转变得到的全奥氏体组织只发生回复过程，冷却时ε马氏体含量比热轧态高，此时的拉伸强度和加工硬化率也较大.当奥氏体化温度为800℃或更高时，奥氏体发生完全静态再结晶.原始奥氏体晶粒尺寸和ε马氏体含量随着温度的升高而增加，但钢的力学性能随之变差.在1200℃下奥氏体化处理后，组织中ε马氏体板条十分细碎;在拉伸时由于奥氏体晶粒尺寸太大，实验钢发生了沿晶断裂.

关键词: 高锰钢, 奥氏体化温度, ε马氏体, 拉伸性能, 加工硬化

Abstract: The effect of austenitizing temperature (tA) on the microstructure and tensile properties for a hot-rolled high-Mn structure steel with excellent damping capacity after heat treatment with different tA has been investigated. The results show that when the tA is up to 600℃， the only recovery occurs in the reversed austenite，and the ε-martensite amount， tensile stress and work hardening rate of the treated steel are higher than those of the rolling state one. When the tA is over 800℃， the completely static recrystallization of austenite can be observed. Moreover， the austenite size and ε-martensite amount of the steel increase with the tA， which results in the deterioration of its tensile properties. Furthermore， after treated at tA=1200℃， the ε-martensite plate becomes very thin，and the fracture along grain boundary is also observed during tensile test owing to the over-sized austenite grains.

Key words: high-Mn steel, austenitizing temperature, ε-martensite, tensile property, work hardening

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