Microstructure and Properties of TIG Welded Joint of FeCrAl Alloy Plates
WANG Henglin1,2, CAO Rui1,2*, CHENG Hongbei1,2, QIN Wei3, ZHOU Shuangshuang3, YAN Yingjie1,2
1 The State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China 2 School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China 3 Advanced Technology & Materials Co., Ltd., China Iron & Steel Research Technology Co., Ltd., Beijing 100081, China
Abstract: TIG welding was used to weld FeCrAl alloy sheet with two sides and multiple layers. The filling material was FeCrAl alloy wire. The weld zone is composed of coarse ferrite microstructure. The heat affected zone is composed of fine equiaxed crystal microstructure. The effect of wel-ding parameters on microstructure and mechanical properties of welded joints was investigated. The maximum tensile strength of the welded joint after heat treatment reaches 400 MPa, about 52.2% of the base metal’ strength. The maximum tensile strength of the welded joint after heat treatment reaches 482 MPa, about 62.3% of the base metal’ strength, which can meet the mechanical properties of the welded joint of FeCrAl alloy sheet as load-bearing structure.
通讯作者:
*曹睿,兰州理工大学,博士、教授、博士研究生导师。获得甘肃省飞天学者和四川省天府学者特聘教授。2003年6月兰州理工大学材料科学与工程学院参加工作至今。主要从事新材料、异种材料的焊接性、强韧性、腐蚀、变形、损伤及断裂行为研究等科研工作。发表SCI检索论文90余篇,发表中文核心期刊论文120余篇。完成著作2部Micromechanism of Cleavage Fracture of Metals、《金属解理断裂微观机理》。完成国家自然科学基金项目、甘肃省科研项目以及企业合作项目40余项。caorui@lut.edu.cn
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