两相区温度对中锰钢IQ&P处理后组织和力学性能的影响

doi:10.13251/j.issn.0254-6051.2020.07.008

金属热处理 ›› 2020, Vol. 45 ›› Issue (7): 37-41.DOI: 10.13251/j.issn.0254-6051.2020.07.008

两相区温度对中锰钢IQ&P处理后组织和力学性能的影响

田亚强¹, 曹仲乾¹, 潘红波², 宋进英¹, 郑小平¹, 陈连生¹

1. 华北理工大学教育部现代冶金技术重点实验室, 河北唐山 063009;
2. 安徽工业大学冶金减排与资源综合利用教育部重点实验室, 安徽马鞍山 243002

收稿日期:2020-01-16 出版日期:2020-07-25 发布日期:2020-09-07
作者简介:田亚强(1980—), 男, 教授, 博士, 主要研究方向为金属材料及塑性成型工艺, E-mail:tyqwylfive@163.com
基金资助:
国家自然科学基金(51574107);国家自然科学基金钢铁联合基金(U1860105);河北省高等学校科学技术研究项目(ZD2019064);华北理工大学研究生创新项目(2019S05)

Effect of intercritical temperature on microstructure and mechanical properties of medium manganese steel after IQ&P treatment

Tian Yaqiang¹, Cao Zhongqian¹, Pan Hongbo², Song Jinying¹, Zheng Xiaoping¹, Chen Liansheng¹

1. Key Laboratory of the Ministry of Education for Modern Metallurgy Technology, North China University of Science and Technology, Tangshan Hebei 063009, China;
2. Key Laboratory of Metallurgical Emission Reduction and Resources Recycling of Ministry of Education, Anhui University of Technology, Ma'anshan Anhui 243002, China

Received:2020-01-16 Online:2020-07-25 Published:2020-09-07

摘要/Abstract

摘要： 利用SEM和室温拉伸试验,研究了两相区温度对IQ&P处理0.1C-7Mn钢组织和力学性能的影响。结果表明,随两相区温度升高,试样的力学性能先升高后降低,两相区温度为660 ℃时,试样的力学性能最优,得到最高强塑积21.2 GPa·%。在较高和较低的两相区温度下进行IQ&P处理时,残留奥氏体由于稳定性过高均不会发生马氏体相变。除此之外,两相区温度为660 ℃时,试样的拉伸曲线存在明显的屈服平台,温度升高后,屈服平台消失。

关键词: 中锰钢, 两相区温度, IQ&, P工艺, 残留奥氏体, 力学性能

Abstract: Effect of intercritical temperature on the microstructure and mechanical properties of IQ&P treated 0.1C-7Mn steel was investigated by means of scanning electron microscope and room temperature tensile testing. The results show that the mechanical properties of the steel first increase and then decrease with intercritical temperature increasing. When the intercritical temperature is 660 ℃, the mechanical properties of the steel are optimal, with the strength-elongation product reaching the maximum of 21.2 GPa·%. When the IQ&P process is carried out at higher and lower intercritical temperature, there is no martensite transformation due to the high stability of the retained austenite. In addition, when the intercritical temperature is 660 ℃, there is a clear yield platform in the tensile stress-strain curve, while it disappears when the intercritical temperature goes higher.

Key words: medium manganese steel, intercritical temperature, IQ&, P process, retained austenite, mechanical properties

中图分类号:

TG142.31

田亚强, 曹仲乾, 潘红波, 宋进英, 郑小平, 陈连生. 两相区温度对中锰钢IQ&P处理后组织和力学性能的影响[J]. 金属热处理, 2020, 45(7): 37-41.

Tian Yaqiang, Cao Zhongqian, Pan Hongbo, Song Jinying, Zheng Xiaoping, Chen Liansheng. Effect of intercritical temperature on microstructure and mechanical properties of medium manganese steel after IQ&P treatment[J]. Heat Treatment of Metals, 2020, 45(7): 37-41.

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两相区温度对中锰钢IQ&P处理后组织和力学性能的影响

Effect of intercritical temperature on microstructure and mechanical properties of medium manganese steel after IQ&P treatment

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