Microstructure and Property of TIG Welded Joint of FeCrAl Alloy Tube
CAO Rui1,*, WANG Henglin1, QIN Wei2, LIU Shaozun2, ZHOU Shuangshuang2, LIU Yibo2, WANG Tiejun2, YAN Yingjie1
1 The State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China 2 Advanced Technology & Materials Co., Ltd., China Iron & Steel Research Technology Co., Ltd., Beijing 100081, China
Abstract: The homogenous materials of FeCrAl alloy tube were welded by TIG welding. By scanning electron microscopy, transmission electron microscopy and energy dispersive spectroscopy, the microstructure characteristics of the welded joint, the distribution of oxide particles in different areas of the welded joint and the mechanical properties of the welded joint were investigated. TIG welding of FeCrAl alloy was carried out by filling FeCrAl alloy wire. The welding joint was mainly composed of weld zone, heat affected zone and base metal. The weld metal zone is composed of coarse ferrite microstructure. The heat affected zone is composed of fine equiaxed crystal microstructure. The oxide particles are obviously coarsened in the weld metal zone. A certain number of oxide particles can still be guaranteed in the weld metal zone. Oxide particles grow up from the original nano oxide particles into sub-micron oxide particles duringthe welding process. Moreover, Y2O3 oxide particles decompose and react with matrix to form composite oxide Y3Al5O12. The maximum tensile strength of TIG welded FeCrAl alloy tube reaches 530 MPa, which is about 80.8% of the strength of base material. The mechanical properties of butt joints of FeCrAl alloy tube with large diameter and large wall thickness can be achieved.
通讯作者:
*曹睿,兰州理工大学,博士、教授、博士研究生导师,甘肃省飞天学者和四川省天府学者特聘教授。2003年6月于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
引用本文:
曹睿, 王恒霖, 秦巍, 刘少尊, 周双双, 刘一波, 王铁军, 闫英杰. FeCrAl合金管TIG焊焊接接头的组织及性能[J]. 材料导报, 2024, 38(2): 22040211-5.
CAO Rui, WANG Henglin, QIN Wei, LIU Shaozun, ZHOU Shuangshuang, LIU Yibo, WANG Tiejun, YAN Yingjie. Microstructure and Property of TIG Welded Joint of FeCrAl Alloy Tube. Materials Reports, 2024, 38(2): 22040211-5.
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2024, Vol. 38 
