Effect of the Aging Treatment on the Tensile Strength and Impact Toughness of Friction Welded Super304H Joints

2018 4th International Conference on Mechanical Engineering and Automation Science

机械制造;原子能学

Yuan, Lu^1 ; Jianlong, Zhang^1^2 ; Debiao, Li^1 ; Cheng, Bi^1 ; Tao, Ning^1

Xi'An Special Equipment Inspection Institute, Xi'an

710065, China^1

School of Mechanical Engineering, Xi'An University of Science and Technology, Xi'an

710054, China^2

关键词: Aging time;    Aging treatment;    Base metals;    Rupture mode;    Welding zones;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/470/1/012028/pdf
DOI  :  10.1088/1757-899X/470/1/012028

来源: IOP

【 摘 要 】

In this paper, the tensile strength and impact toughness of the friction welded Super304H joints were studied after aging at 625°C for different time. As the aging time increased, the welding zone, heat affected zone and base metal were still austenite, and the number of precipitates gradually increased. The impact toughness of the joints decreased, the tensile strength of the joints increased firstly, than decreased after aged for 500 h, this is attributed to the aggregation and growth of the Cr23C6 carbides. The rupture mode of tensile strength and impact toughness samples changed from ductile fracture to brittle fracture.