A new resource-saving, high manganese and nitrogen super duplex stainless steel 25Cr–2Ni–3Mo–xMn–N

Li, Jun; Xu, Yulai; Xiao, Xiudi; Zhao, Jiuzhou; Jiang, Laizhu; Hu, Jincheng

doi:10.1016/j.msea.2009.07.065

Cited by 35 publications

(10 citation statements)

References 15 publications

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“…Manganese stabilizes the austenite, but it is not effective as Ni in stabilizing the γ-phase. Therefore, N is added with Mn simultaneously to DSSs to balance a decrease in the Ni content [ 11 , 12 , 13 , 14 , 15 ]. Cu addition is beneficial for enhancing the resistance of DSSs in non-oxidizing solutions.…”

Section: Introductionmentioning

confidence: 99%

Effect of Secondary Phase Precipitation on the Corrosion Behavior of Duplex Stainless Steels

2014

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Duplex stainless steels (DSSs) with austenitic and ferritic phases have been increasingly used for many industrial applications due to their good mechanical properties and corrosion resistance in acidic, caustic and marine environments. However, DSSs are susceptible to intergranular, pitting and stress corrosion in corrosive environments due to the formation of secondary phases. Such phases are induced in DSSs during the fabrication, improper heat treatment, welding process and prolonged exposure to high temperatures during their service lives. These include the precipitation of sigma and chi phases at 700–900 °C and spinodal decomposition of ferritic grains into Cr-rich and Cr-poor phases at 350–550 °C, respectively. This article gives the state-of the-art review on the microstructural evolution of secondary phase formation and their effects on the corrosion behavior of DSSs.

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Section: Introductionmentioning

confidence: 99%

Effect of Secondary Phase Precipitation on the Corrosion Behavior of Duplex Stainless Steels

2014

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“…Manganese is also a strong effective γ‐stabilizer and it can increase nitrogen solubility by adding it to DSS. [ 7,8 ] Thus, nitrogen‐containing DSS with high Mn content has good prospects in practical application. Related research mainly concentrated on the mechanical properties and corrosion resistance of Mn‐containing materials.…”

Section: Introductionmentioning

confidence: 99%

“…Toor et al [ 1 ] reported a new high‐Mn Ni‐free DSS (18Cr–1Mo–6Mn–0.2N) and found that the pitting resistance decreased with Mn additions. Li et al [ 8 ] discussed a new group of 25Cr–2Ni–3Mo– x Mn–N ( x = 8.03,9.80,11.95) DSS and found that the increase in manganese can improve the ultimate tensile strength and elongation but promote the formation of sigma ( σ ) precipitates and reduce pitting corrosion potential. What's more, there are some reports on the hot deformation behavior of austenitic heat‐resistant steel [ 9 ] and commercial DSS, [ 3,10,11 ] which are focused on microstructural evolution, hot activation energy, and constitutive equation.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Hot Compression Precipitation and Recrystallization Behavior of 23.7Cr–2.2Ni–1.3Mo–14Mn–0.26N High‐Manganese Low‐Nickel Duplex Stainless Steel

Yang

Pan

et al. 2020

steel research int.

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Isothermal compression deformation studies for 23.7Cr–2.2Ni–1.3Mo–14Mn–0.26 N low‐nickel duplex stainless steel (DSS) are investigated under deformation conditions of 800–1150 °C/0.01–10 s−1. The flow curve and deformation microstructure analysis show that deformation softening changes from ferrite dynamic recrystallization (DRX) to austenite DRX, with increasing temperature from 800 and 900 °C to 1050 °C deformed at 0.01–1 s−1. The sigma (σ) precipitate formation is mainly affected by the interaction of deformation temperature and strain rate. In addition to deformation time controlled by strain rate, the refining microstructure of ferrite DRX accelerates σ precipitate formation due to the increase in diffusion channels deformed at 900 °C/0.01 s−1 and 900 °C/1 s−1. The hot deformation activation energy is calculated as 367.03 kJ mol−1, and the relationship between the critical conditions for DRX initiating and Zener–Hollomon parameters is established. The decreasing Z value contributes to deformation softening at low strain, and the DRX softening effect is enhanced deformed at 800–900 °C/0.01–0.1 s−1. Meanwhile, the modified dynamic crystallization kinetics model of tested DSS at a strain rate of 1 s−1 is established.

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“…Therefore, DSSs are suitable for many applications, such as chemical, petrochemical [3,4], power and oil gas industries owing to their good mechanical properties and superior pitting resistance in chloride environment [5]. In the past, sufficient amounts of alloy elements such as chromium, molybdenum and nickel were added in conventional DSSs to achieve better pitting resistance in order to meet the requirement of aggressive corrosion environment.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-induced selective high-temperature internal oxidation behavior in duplex stainless steels 19Cr–10Mn–0.3Ni– x N

Ran

Liu

et al. 2015

Corrosion Science

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A new resource-saving, high manganese and nitrogen super duplex stainless steel 25Cr–2Ni–3Mo–xMn–N

Cited by 35 publications

References 15 publications

Effect of Secondary Phase Precipitation on the Corrosion Behavior of Duplex Stainless Steels

Effect of Secondary Phase Precipitation on the Corrosion Behavior of Duplex Stainless Steels

Investigation on Hot Compression Precipitation and Recrystallization Behavior of 23.7Cr–2.2Ni–1.3Mo–14Mn–0.26N High‐Manganese Low‐Nickel Duplex Stainless Steel

Nitrogen-induced selective high-temperature internal oxidation behavior in duplex stainless steels 19Cr–10Mn–0.3Ni– x N

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