Effect of solution treatment on properties of DSS2205 laser weld seam

doi:10.13251/j.issn.0254-6051.2020.12.022

Abstract

Abstract: Aiming at the problem of disproportionate of ferrite and austenite of duplex stainless steel weld seam after laser welding, the DSS2205 laser weld seam was solution treated at different temperatures and time through the Gleeble-1300 thermal simulation tester. The results show that under different solid solution conditions, the austenite morphology and the two phase ratios change greatly. With the increase of temperature and holding time, the alloying elements fully diffuse and migrate in the two phases, and the austenite grain gradually grows, the content first increases and then decreases. After solution treated at 1050 ℃ for 5 min, the microstructure of the specimen is uniform, the proper proportion of ferrite and austenite phase can be obtained, the hardness gradient of weld seam is uniform, and the impact property becomes the best.

Key words: solution treatment, DSS2205, weld seam, microstructure, properties

CLC Number:

TG156.1

Wang Weidong, Bi Zongyue, Xian Linyun, Wang Haitao, Li Xiaolong, Liu Yudong, Yu Chenyang, Xu Xueli. Effect of solution treatment on properties of DSS2205 laser weld seam[J]. Heat Treatment of Metals, 2020, 45(12): 114-119.

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