Q345/KB968复合板热处理改性工艺研究  

Study on Heat Treatment Modification Process of Q345/KB968 Composite Board

作　　者：邵甄胰 姚作杨[1] 黄浩东 周佳兴 喻红梅 程姝 陈科炆 唐一文 SHAO Zhenyi;YAO Zuoyang;HUANG Haodong;ZHOU Jiaxing;YU Hongmei;CHENG Shu;CHEN Kewen;TANG Yiwen(School of Material Engineering,Chengdu Technological University,Chengdu 611730,China;School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]成都工业学院材料工程学院,成都611731 [2]西南交通大学材料科学与工程学院,成都610031

出　　处：《成都工业学院学报》2021年第2期1-6,共6页Journal of Chengdu Technological University

基　　金：中国博士后科学基金面上资助项目(二等)(2017M623054);四川省大学生创新创业训练计划项目(201711116071);四川省2019年度留学回国人员科技活动项目择优资助优秀类项目。

摘　　要：以Q345钢为基板,高铬高碳合金药芯焊丝KB968为覆层材料,采用CO_(2)气体保护焊在基板堆焊,焊后进行热处理改性工艺研究,以提高复合板的冲击韧性和覆层硬度。通过维氏硬度计、冲击试验机、金相显微镜、X射线衍射仪、扫描电镜对堆焊层进行性能测试和显微组织分析。结果表明,基板预热到300℃,焊后250℃随炉缓冷,650℃退火,再堆焊第2层,覆层平均硬度达到691.5 HV_(1),冲击功平均值为34.25 J,硬度与冲击韧性相较直接堆焊都有较大提升。Q345 steel was used as the substrate,and high-chromium high-carbon alloy flux-cored wire KB968 was used as the cladding material.CO_(2) gas shielded welding was adopted for surfacing welding on the substrate.After welding,the heat treatment modification process was studied to improve the impact toughness and cladding hardness of the composite board.The performance test and microstructure analysis of the surfacing layer were performed by vickers hardness tester,impact testing machine,metallograph microscope,X-ray diffractometer and scanning electron microscope.The results show that the substrate was preheated to 300℃,cooled slowly in the furnace at 250℃after welding,annealed at 650℃,and then executed the second cladding,the average hardness of the cladding reached 691.5 HV_(1),and the average impact energy was 34.25 J.

关 键 词：Q345 药芯焊丝 热处理 复合板 冲击功 硬度 

分 类 号：TG15[金属学及工艺—热处理]