时效热处理对Fe-Mn-Al-C轻质高锰钢拉伸和冲击性能的影响  

The Effect of Aging Treatment on the Mechanical and Impact Properties of Solid Soluted Fe-Mn-Al-C Lightweight High Manganese Steel

作　　者：杨壹 杨浩坤 何强 龙骏 韩培贤 郑志斌 YANG Yi;YANG Haokun;HE Qiang;LONG Jun;HAN Peixian;ZHENG Zhibin(Institute of New Materials,Guangdong Academy of Sciences/National Engineering Research Center of Powder Metallurgy of Titanium&Rare Metals/Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application,Guangzhou 510620,China;Smart Manufacturing Division,Hong Kong Productivity Council,Hong Kong 999077,China;Zhangjiajie Institute of Aeronautical Engineering,School of Aeronautical Manufacturing,Zhangjiajie 427000,China;Jiangxi Lianfeng Investment Casting Co.,Ltd,Yichun 336300,China)

机构地区：[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]香港生产力促进局智能制造部,中国香港999077 [3]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 [4]江西联峰熔模铸造有限公司,江西宜春336300

出　　处：《材料研究与应用》2023年第2期303-309,共7页Materials Research and Application

基　　金：广东省科学院发展专项资金项目(2022GDASZH-2022010103);广东省国际科技合作项目(2021A0505030051);中国香港创新及科技基金(ITP-020-21AP,ITP-041-20AP);广州市青年科技人才托举项目资助(QT20220101075);第八届青年人才托举工程(2022QNRC001);江西省“双千计划”(S2020CXTD0356)。

摘　　要：含铝高锰钢因具有优异的耐磨性、加工硬化能力和低密度特性,作为耐磨器件的关键零配件而被广泛使用,以达到实现轻量化需求和工业节能降耗目的。在ZGMn18Cr2(成分为Fe-18Mn-1.2C-2Cr,质量百分比)的基础上,通过加入质量分数4%的铝,制备出轻质高锰钢。通过光学显微镜(OM)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、维氏硬度、布氏硬度、摆锤冲击试验和拉伸试验等测试手段,研究了时效热处理对1 100℃固溶态轻质高锰钢的组织、硬度、拉伸和冲击等力学性能的影响。结果表明:随着时效温度的升高,经300—500℃时效处理后轻质高锰钢的屈强比、硬度及冲击韧性逐渐增强;但经600℃时效热处理后,在轻质高锰钢的晶界处析出大量碳化物而形成晶界脆性,最终导致其力学性能恶化,其延伸率和强度急剧降低。Aluminum-containing high Manganese(Mn)steels are widely used as key parts for wear-resistant devices due to their excellent wear resistance,work hardening ability,and low-density characteristics,in order to achieve the lightweight design and industrial energy-saving and consumption reduction.In the present study,a lightweight high Mn steel with a composition of Fe-18Mn-4Al-1.2C-2Cr(wt.%)is designed by adding the mass fraction of 4%aluminum,and the effect of aging heat treatment on the microstructure,tensile and impact properties of 1100℃solid soluted steel was studied by optical microscope(OM),X-ray diffractometer(XRD),scanning electron microscope(SEM),hardness test,pendulum impact tests and tensile tests.The results show that the tensile-to-yield stress ratio,hardness and impact energy of the material,after aging between 300 to 500℃,increases gradually with the aging temperature.At the same time,the metallographic results show that a large number of carbides were precipitated at the grain boundaries after aging heat treatment at 600℃,forming grain boundary brittleness and leading to the deterioration of the mechanical properties of the lightweight high Mn steel,thus elongation and strength of the light-weight wear-resistant steel decreased sharply after aging at 600℃.

关 键 词：高锰钢 拉伸 冲击 金相 轻量化 

分 类 号：TG142.1[一般工业技术—材料科学与工程]