Heat-affected zone ferrite content control of a duplex stainless steel grade to enhance weldability

被引:0
作者
Anne Higelin
Sandra Le Manchet
Gilles Passot
Sarata Cissé
John Grocki
机构
[1] Centre de Recherche Des Matériaux Au Creusot,
[2] Industeel – ArcelorMittal,undefined
[3] Industeel-ArcelorMittal USA,undefined
来源
Welding in the World | 2022年 / 66卷
关键词
Duplex stainless steels; Weldability; Ferrite content; Heat-affected zone; Low temperature;
D O I
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中图分类号
学科分类号
摘要
Duplex stainless steels (DSS) have a microstructure consisting of 50% ferrite α and 50% austenite γ. This two-phase microstructure provides the duplex stainless steels with attractive mechanical and corrosion properties. However, the microstructure is very dependent on the heat treatment and chemical composition. During the welding process, the temperature reached in the heat-affected zone (HAZ) retransforms austenite into ferrite. Due to the high cooling rates, only a part of the ferrite is retransformed into austenite. This tends to modify the 50/50 phase equilibrium. The cooling rate is linked not only to heat input but also to the thickness of the welded plates. Most of the standards limit the ferrite content in the range from 30 to 70%. However, the 70% limit for ferrite content in HAZ may be difficult to obtain especially for heavy plate thicknesses. To limit the maximum ferrite content in HAZ, a duplex stainless grade with high nitrogen and nickel within the 2205 composition range, called Arctic 2205, was developed. This paper will provide details on ferrite content measurement by metallographic method and welding results obtained on industrial welds showing very low and stable ferrite content in HAZ. Mechanical properties obtained on these welds at low temperature will also be reported, pushing the limits of use of duplex from − 50 °C (− 58 °F) down to − 100 °C (− 148 °F).
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页码:1503 / 1519
页数:16
相关论文
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[1]  
Kordatos JD(2001)The effect of cooling rate on the mechanical and corrosion properties of SAF 2205 (UNS 31803) duplex stainless steel welds Scripta mater 44 401-408
[2]  
Fourlaris G(2011)The effect of large heat input on the microstructure and corrosion behaviour of simulated heat affected zone in 2205 duplex stainless steel Corros Sci 53 3756-3763
[3]  
Papadimitriou G(2005)Effect of nickel and nitrogen addition on the microstructure and mechanical properties of power beam processed duplex stainless steel (UNS 31803) weld metals Mater Lett 59 2305-9
[4]  
Yang Y(2019)Welding behaviour of duplex stainless steel AISI 2205: a review Mater Today Proc 18 2731-2737
[5]  
Yan B(2020)Bead by bead study of a multipass shielded metal arc-welded super-duplex stainless steel Weld World 64 283-299
[6]  
Li J(2003)Nitrogen control during autogenous arc welding of stainless steel — part 1: experimental observations Welding journal 82 219-s-224-s
[7]  
Wang J(2019)Effect of heat input and role of nitrogen on the phase evolution of 2205 duplex stainless steel weldment Int J Press Vessels Pip 176 7-undefined
[8]  
Muthupandi V(undefined)undefined undefined undefined undefined-undefined
[9]  
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[10]  
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