固溶温度对Fe-20Mn-9Al-1.2C低密度钢组织性能的影响

doi:10.12068/j.issn.1005-3026.2023.05.001

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (5): 609-616.DOI: 10.12068/j.issn.1005-3026.2023.05.001

• 材料与冶金 • 下一篇

固溶温度对Fe-20Mn-9Al-1.2C低密度钢组织性能的影响

王海涛，李家栋，邓想涛，王昭东

(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)

发布日期:2023-05-24
通讯作者: 王海涛
作者简介:王海涛(1997-)，男，辽宁鞍山人，东北大学硕士研究生；邓想涛(1983-)，男，湖北孝感人，东北大学副教授，硕士生导师；王昭东(1968-)，男，安徽淮南人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(U1960112)；辽宁省兴辽英才计划项目(XLYC2007030).

Effect of Solution Temperature on Microstructure and Mechanical Properties of Fe-20Mn-9Al-1.2C Low-Density Steel

WANG Hai-tao， LI Jia-dong， DENG Xiang-tao， WANG Zhao-dong

State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China.

Published:2023-05-24
Contact: DENG Xiang-tao
About author:-
Supported by:
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摘要/Abstract

摘要： 为了达到低密度高强钢优异强韧性结合的目的，设计了一种低密度高强钢Fe-20Mn-9Al-1.2C，经冶炼、锻造和热轧后在900，950，1000，1050℃下分别进行固溶处理，保温24min，并快速水淬，采用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射(XRD)、电子探针(EMPA)等试验方法研究固溶温度对试验钢组织性能的影响.结果表明:所设计的新型低密度钢的密度为6.826g/cm³，比常规钢的密度降低约13%.当固溶温度为1000℃，低密度钢的综合力学性能最佳，其抗拉强度可达1065MPa，屈服强度为937MPa，延伸率为65.3%，强塑积可达69.5 GPa·%，-40℃冲击功(V型缺口)为49J.

关键词: Fe-Mn-Al-C系低密度钢；固溶温度；к-碳化物；显微组织；力学性能

Abstract: To obtain an excellent combination of strength and toughness， a new heat treatment route of low-density Fe-20Mn-9Al-1.2C steel was designed. After smelting， forging and hot rolling， the steel was treated by solid solution at 900， 950， 1000 and 1050℃， respectively for 24min and a water quenching afterward. The effect of solid solution temperature on microstructure and mechanical property of the tested steel was studied by OM， SEM， XRD， EMPA and other methods. The results show that the density of the steel is 6.826 g/cm³， which is about 13% lower than the conventional one. When the solid solution temperature is 1000℃， the comprehensive mechanical properties of the steel are the best with the tensile strength of 1065MPa， yield strength of 937MPa， elongation of 65.3%， strong strength-ductility product of 69.5 GPa·%， and impact energy(V-notch) at-40℃ of 49 J， respectively.

Key words: Fe-Mn-Al-C low-density steel； solution temperature； к-carbides； microstructure； mechanical property

中图分类号:

TP000

王海涛，李家栋，邓想涛，王昭东. 固溶温度对Fe-20Mn-9Al-1.2C低密度钢组织性能的影响[J]. 东北大学学报（自然科学版）, 2023, 44(5): 609-616.

WANG Hai-tao， LI Jia-dong， DENG Xiang-tao， WANG Zhao-dong. Effect of Solution Temperature on Microstructure and Mechanical Properties of Fe-20Mn-9Al-1.2C Low-Density Steel[J]. Journal of Northeastern University(Natural Science), 2023, 44(5): 609-616.

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固溶温度对Fe-20Mn-9Al-1.2C低密度钢组织性能的影响

Effect of Solution Temperature on Microstructure and Mechanical Properties of Fe-20Mn-9Al-1.2C Low-Density Steel

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