金属热处理 ›› 2023, Vol. 48 ›› Issue (8): 113-117.DOI: 10.13251/j.issn.0254-6051.2023.08.018

• 工艺研究 • 上一篇    下一篇

固溶温度对轻质高锰钢组织及性能的影响

杨壹1,2, 刘让贤2, 杨浩坤3, 龙骏1,4, 韩培贤4, 郑志斌1   

  1. 1.广东省科学院 新材料研究所 国家钛及稀有金属粉末冶金工程技术研究中心 广东省金属强韧化技术与应用重点实验室, 广东 广州 510620;
    2.张家界航空工业职业技术学院 航空制造学院, 湖南 张家界 427000;
    3.香港生产力促进局, 香港 999077;
    4.江西联峰熔模铸造有限公司, 江西 宜春 336300
  • 收稿日期:2023-03-06 修回日期:2023-07-01 出版日期:2023-08-25 发布日期:2023-10-10
  • 通讯作者: 郑志斌,高级工程师,博士,E-mail: zhengzhibin@gdinm.com
  • 作者简介:杨 壹(1995—),男,助教,硕士,主要研究方向为耐磨钢的组织性能及磨损行为,E-mail: youngy111x@163.com。
  • 基金资助:
    湖南省教育厅科学研究项目(19C1881);广东省科学院发展专项(2022GDASZH-2022010103);第八届青年人才托举工程(2022QNRC001);广东省自然科学基金面上项目(2021A1515010620);广州市青年科技人才托举工程项目(QT20220101075);江西省“双千计划”(S2020CXTD0356)

Effect of solution temperature on microstructure and properties of lightweight high manganese steel

Yang Yi1,2, Liu Rangxian2, Yang Haokun3, Long Jun1,4, Han Peixian4, Zheng Zhibin1   

  1. 1. Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application, National Engineering Research Center of Powder Metallurgy of Titanium & Rare Metals, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou Guangdong 510620, China;
    2. School of Aeronautical Manufacturing, Zhangjiajie Institute of Aeronautical Engineering, Zhangjiajie Hunan 427000, China;
    3. Hong Kong Productivity Council, Hongkong 999077, China;
    4. Jiangxi Lianfeng Investment Casting Co., Ltd., Yichun Jiangxi 336300, China
  • Received:2023-03-06 Revised:2023-07-01 Online:2023-08-25 Published:2023-10-10

摘要: 通过光学显微镜、X射线衍射仪、扫描电镜、显微硬度试验、摆锤式冲击试验和拉伸试验等手段对不同温度固溶后的ZGMn18Cr2-4Al轻质高锰钢的组织、力学性能进行了研究。结果表明,固溶温度为980~1150 ℃时,随着固溶温度的升高,晶界上粗大的碳化物逐渐溶解,晶粒尺寸先减小,然后增大;硬度先略微下降,然后在一个相对稳定的区间波动;冲击吸收能量则先增加后趋于平稳;屈服强度、抗拉强度和伸长率均先升高后下降。该轻质钢最佳固溶温度为1100 ℃,在该温度下综合性能最优,硬度为269 HV0.2,冲击吸收能量为160 J,强塑积为39.4 GPa·%,拉伸断口为典型的韧性断口。

关键词: 固溶处理, 轻质高锰钢, 组织结构, 力学性能

Abstract: Microstructure and mechanical properties of ZGMn18Cr2-4Al lightweight high manganese steel solution treated at different temperatures were studied by means of optical microscope, X-ray diffractometer, scanning electron microscope, hardness testing, impact testing and tensile testing. The results show that when solution treated at 980-1150 ℃, with the increase of solution temperature, the coarse carbides on the grain boundary dissolve, the grain size first decreases and then increases, the hardness decreases slightly, and then fluctuates in a relatively stable range, the impact absorbed energy increases firstly and then tends to be stable, and the yield strength, tensile strength and elongation increase first and then decrease. The optimal solution treatment temperature of the lightweight steel is 1100 ℃. At the solution treatment temperature of 1100 ℃, the comprehensive properties are the best, with hardness of 269 HV0.2, impact absorbed energy of 160 J, the product of strength and elongation of 39.4 GPa·%, and the tensile fracture is typical ductile fracture.

Key words: solution treatment, lightweight high manganese steel, microstructure, mechanical properties

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