The Influence of Annealing Process on Microstructure of Welded Joint of Weathering Steel

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Zhang, Qiang^1 ; Wu, Zhe^2 ; Li, Hongwu^1

Science and Technology on Vehicle Transmission Laboratory, China North Vehicle Research Institute, Beijing

100072, China^1

School of Mechanical Engineering, Hebei University of Science and Technology, 050018, China^2

关键词: Annealing process;    Annealing treatments;    Columnar crystals;    Equiaxial crystals;    Fusion lines;    Microstructure of welded joints;    Steel welded joints;    Structure and properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/2/022042/pdf
DOI  :  10.1088/1757-899X/452/2/022042

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, the structure and properties of Q355NH weathering steel welded joints were studied. Through the analysis of the micro-structure of welded joint, the results showed that the fine grain area, columnar crystal and equiaxial crystal existed both before and after the annealing, and the grain size at the bottom of the cover welds was larger than that of the bottom welds. After annealing, the grain size became uniform and the size was reduced. Moreover, the fusion line became less obvious. After annealing treatment, the distribution of martensite inside the welds was more uniform than that of untreated ones.