Structure and Properties of Welded Joint for UNS31803 Duplex Stainless Steel by Shielded Metal Arc Welding

DAI Xucheng; CHEN Qiang; TONG Minglei; ZHANG Xiuhe

doi:10.11973/lhjy-wl201907004

PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING > 2019 > 55(7): 445-450. > DOI: 10.11973/lhjy-wl201907004

DAI Xucheng, CHEN Qiang, TONG Minglei, ZHANG Xiuhe. Structure and Properties of Welded Joint for UNS31803 Duplex Stainless Steel by Shielded Metal Arc Welding[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2019, 55(7): 445-450. DOI: 10.11973/lhjy-wl201907004

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Structure and Properties of Welded Joint for UNS31803 Duplex Stainless Steel by Shielded Metal Arc Welding

1. Offshore Oil Engineering Co., Ltd., Qingdao 266520, China;
2. Offshore Oil Engineering(Qingdao) Co., Ltd., Qingdao 266520, China

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Received Date: May 10, 2018

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Duplex stainless steel UNS31803 was welded by shielded metal arc welding (SMAW). Microstructure and properties of the welded joint for UNS31803 duplex stainless steel by SMAW were analyzed by means of metallographic examination, mechanical property test, hardness test and corrosion resistance test. The results show that the microstructure of the weld seam were ferrite+austenite, and without σ phase precipitation when proper welding parameters were adopted. The welded joint had excellent mechanical properties, and the ferrite content of the weld seam and the heat affected zone was within the reasonable range of 35%-65% (volume fraction). In 6% (mass fraction) FeCl₃ solution at 22℃, the different regions of the welded joint had good corrosion resistance.
- duplex stainless steel,
- shielded metal arc welding (SMAW),
- microstructure,
- mechanical property,
- corrosion resistance

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Structure and Properties of Welded Joint for UNS31803 Duplex Stainless Steel by Shielded Metal Arc Welding

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