固溶处理对Fe30Mn10Al1C低密度钢组织和性能的影响  

Effect of solution treatment on microstructure and properties of Fe30Mn10Al1C low density steel

作　　者：孙建 李灼[1] 夏明六 罗来马 李景辉[4] 黄贞益 SUN Jian;LI Zhuo;XIA Ming-liu;LUO Lai-ma;LI Jing-hui;HUANG Zhen-yi(School of Mechanical Engineering,Tongling University,Tongling 244061,China;Tongling Special Equipment Supervision and Inspection Center,Tongling 244099,China;School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;School of Metallurgical Engineering,Anhui University of Technology,Ma’anshan 243002,China)

机构地区：[1]铜陵学院机械工程学院,安徽铜陵244061 [2]铜陵市特种设备监督检验中心,安徽铜陵244099 [3]合肥工业大学材料科学与工程学院,安徽合肥230009 [4]安徽工业大学冶金工程学院,安徽马鞍山243002

出　　处：《材料热处理学报》2024年第11期121-131,共11页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51674004,51805002);安徽省高等学校自然科学研究重点项目(2022AH051760);铜陵学院自然科学研究项目(2023tlxy05,2017tlxy23);工程液压机器人安徽普通高校重点实验室(铜陵学院)开放课题资助项目(TLXYCHR-O-21YB03);铜陵学院大学生科研基金项目(2023tlxydxs090)。

摘　　要：采用扫描电镜(SEM)、X射线衍射(XRD)、电子背散射衍射(EBSD)技术、透射电镜(TEM)、维氏硬度计和电子万能实验机等研究了不同温度(950~1050℃)固溶处理对Fe30Mn10Al1C低密度钢组织和力学性能的影响,并分析了其变形机制。结果表明:固溶处理后,Fe30Mn10Al1C低密度钢的组织和力学性能变化较为明显;随着固溶温度的升高,Fe30Mn10Al1C低密度钢平均晶粒尺寸增大,奥氏体内存在着孪晶,基体内的几何必须位错密度是拉伸变形前的4~5倍。固溶处理后,Fe30Mn10Al1C低密度钢的综合力学性能相比原始态大幅提高,在950和1050℃固溶处理后的强塑积最高,分别为85.6和84.4 GPa·%。Fe30Mn10Al1C低密度钢拉伸变形后呈典型的位错滑移特征,且组织中存在着大量的位错墙、泰勒晶格和微带,提高了其强度和塑性。Effect of solution treatment at different temperatures(950-1050℃)on microstructure and mechanical properties of Fe30Mn10Al1C low density steel was studied using scanning electron microscopy(SEM),X-ray diffraction(XRD),electron backscatter diffraction(EBSD)technique,transmission electron microscopy(TEM),Vickers hardness tester and electronic universal testing machine,and its deformation mechanism was analyzed.The results show that after solution treatment,the microstructure and mechanical properties of the Fe30Mn10Al1C low density steel change significantly.With the increase of solution treatment temperature,the average grain size of the Fe30Mn10Al1C low density steel increases,twinning exists in the austenite,and the geometrically necessary dislocation density in the matrix is 4-5 times that before tensile deformation.After solution treatment,the comprehensive mechanical properties of the Fe30Mn10Al1C low-density steel are significantly improved compared with the original state.The highest product of strength and plasticity is obtained after solution treatment at 950 and 1050℃,with values of 85.6 GPa·%and 84.4 GPa·%,respectively.The Fe30Mn10Al1C low-density steel exhibits typical dislocation slip characteristics after tensile deformation,and there are a large number of dislocation walls,Taylor lattices and microband in the microstructure,which improve its strength and plasticity.

关 键 词：低密度钢 固溶处理 微观组织 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]