Title: Multiple welding simulated microstructure and corrosion resistance of super austenitic stainless steel 254SMo welding heat affected zone

Authors: Guangwei Fan; Jie Liu; Guannan Zhang; Yugui Li; Gang Luo; Xiaojie Lian; Guoping Li

Addresses: Taiyuan Iron and Steel Group Co. Ltd., Taiyuan, China ' College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, China ' College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, China ' College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, China ' Taiyuan Iron and Steel Group Co. Ltd, Taiyuan, China ' Taiyuan Iron and Steel Group Co. Ltd, Taiyuan, China ' Taiyuan Iron and Steel Group Co. Ltd, Taiyuan, China

Abstract: This paper studies the effects of thermal cycle and heat input on microstructure, grain size, precipitated phase and corrosion properties in the simulated heat-affected zone of super austenitic stainless steel 254SMo. The results show that the microstructure grains in the heat affected zone gradually grow up, the pitting corrosion resistance decreases continuously and intergranular corrosion resistance firstly decreases and then increases with the thermal cycle and heat input increase. The precipitated phase appears in the heat-affected zone at the multiple thermal cycles and high heat input.

Keywords: super austenitic stainless steel; simulated heat-affected zone; thermal cycles; heat inputs; precipitated phase; corrosion resistance.

DOI: 10.1504/IJCMSSE.2020.107397

International Journal of Computational Materials Science and Surface Engineering, 2020 Vol.9 No.1, pp.38 - 52

Received: 13 May 2019
Accepted: 05 Nov 2019

Published online: 22 May 2020 *

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