The research of the auxiliary power of Q235 steel friction stir welding technology and joint microstructure's observation

doi:10.4028/www.scientific.net/AMR.538-541.1451

	The research of the auxiliary power of Q235 steel friction stir welding technology and joint microstructure's observation
	Wang, Xijing; Lu, Yongxin; Liang, Jianli; Ping, Sun
	2012
会议日期	July 6, 2012 - July 6, 2012
会议地点	Zhuhai, China
关键词	Aluminum Brittle fracture Friction stir welding Heat affected zone Microhardness Microstructure Soldered joints Auxiliary power Fracture morphology Heating temperatures Joint microstructures Microscopic organization Orthogonal experiment Orthogonal test method Q235 steel Stir zones Thermomechanically affected zones Welding joints
卷号	538-541
DOI	10.4028/www.scientific.net/AMR.538-541.1451
页码	1451-1455
英文摘要	Friction Stir Welding (FSW) is a new and developing technology that has been used succefully in the joining of aluminum and aluminum alloys.To demonstrate the feasibility of the auxiliary power of Q235 steel friction stir welding, we used orthogonal test method to design auxiliary power FSW parameter,then welded 200mm×80mm×4mm of Q235 with the parameter. The result shows that the rotating 1200 r/min, the stay time 10s and the heating temperature 700 °C,the welding joint tensile strength can reach 332.19 MPa. Analysing the parameter fracture morphology,we found that the fracture is divided into three levels: the upper part is the ductile fracture; the middle part is the combination of the ductile fracture and the brittle fracture;the lower part is the majority of the brittle fracture, and exists the local ductile fracture. Analysing the microstructure,we found that welding joint is divided into the base zone, the heat affected zone,the thermo-mechanically affected zone and the stir zone,and the microscopic organization of every area is influenced by the heat and the force on the area. The microhardness of stir area improves 12% on average than the base's.The microhardness of the heat affected zone and the thermo-mechanically affected zone decreases, comparing to the base's. © (2012) Trans Tech Publications, Switzerland.
会议录	Advanced Materials Research
会议录出版者	Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany
语种	英语
ISSN号	10226680
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/117819]
专题	材料科学与工程学院
作者单位	State Key Laboratory of Advanced Non-ferrous Materials, Lanzhou University of Technology, Lanzhou 730050, China
推荐引用方式 GB/T 7714	Wang, Xijing,Lu, Yongxin,Liang, Jianli,et al. The research of the auxiliary power of Q235 steel friction stir welding technology and joint microstructure's observation[C]. 见:. Zhuhai, China. July 6, 2012 - July 6, 2012.