Precipitation Behaviors of SAF2507 Duplex Stainless Steel Precipitated Phase by Secondary Quench Stamping
GUO Youdan1,*, CHENG Xiaonong2
1 School of Marine Equipment and Mechanical Engineering, Jimei University, Xiamen 361021, Fujian, China 2 School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
Abstract: The forming of SAF2507 duplex stainless steel (SAF2507 DSS) propeller blade was carried out by the technique of secondary quench stamping. The precipitated phase precipitation behavior during SAF2507 DSS forming was studied by scanning electron microscopy (SEM), EDAX energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), etc. The results show that σ phase and χ phase are the main precipitates during SAF2507 DSS secondary quench stamping. The forming temperature and cooling rate are the key factors to determine the precipitation behavior. There exists a transition temperature for both σ and χ phase precipitation during secondary quench stamping. When the temperature is less than 950 ℃, the amount of σ phase increases with the increase of temperature, and when the temperature is greater than 950 ℃, the amount of σ phase decreases with the increase of temperature. When the temperature is less than 850 ℃, the amount of χ phase increases with the increase of temperature. When the temperature is more than 850 ℃, the precipitation of χ phase stopped and gradually transforms into σ phase. During rapid cooling, σ phase and χ phase nucleate and precipitate effectively, and there is a precipitation critical cooling rate vσ and vχ. When the cooling rate is greater than the critical cooling rate, neither σ phase nor χ phase can nucleate and precipitate effectively. In addition, many factors such as the long distance diffusion and segregation of Cr, Mo and Ni in SAF2507 DSS, surface oxidation and surface oxides, and grain refinement under forming force, can affect the nucleation and precipitation of σ phase and χ phase during the secondary quench stamping too.
1 Feng H, Zhou X Y, Liu H, et al. Journal of Iron and Steel Research, 2015, 27(4), 1 (in Chinese). 丰涵, 周晓玉, 刘虎, 等. 钢铁研究学报, 2015, 27(4), 1. 2 Verma J, Taiwade R V, Khatirkar R K. Transactions of the Indian institute of Metals, 2017, 70, 225. 3 Wang L X, Petrochemical Equipment Technology, 2017, 38(2), 54 (in Chinese). 王兰喜. 石油化工设备技术, 2017, 38(2), 54. 4 Zhang P, Chen X Q, Shang F, et al. Hot Working Technology, 2018, 47(15), 14 (in Chinese). 张鹏, 陈晓秋, 尚峰, 等. 热加工工艺, 2018, 47(15), 14. 5 Yi H L, Chang Z Y, Cai H L, et al. Acta Metallurgica Sinica, 2020, 56(4), 429 (in Chinese). 易红亮, 常智渊, 才贺龙, 等. 金属学报, 2020, 56(4), 429. 6 Jiang H T, Tang D, Mi Z L, et al. Journal of Materials Engineering, 2010(2), 69 (in Chinese). 江海涛, 唐荻, 米振莉, 等. 材料工程, 2010(2), 69. 7 Han Y, Chen X D, Liu Q K, et al. Journal of Mechanical Engineering, 2012, 48(21), 87 (in Chinese). 韩豫, 陈学东, 刘全坤, 等. 机械工程学报, 2012, 48(21), 87. 8 Guo Y D, Cheng X N, Lan J F et al. Transactions of materials and heattreatment, 2017, 38(10), 60 (in Chinese). 郭幼丹, 程晓农, 蓝剑锋, 等. 材料热处理学报, 2017, 38(10), 60. 9 Huang C S, Shih C C. Materials Science and Engineering A, 2005, 402, 66. 10 Liu Z B, Liang J X, Su J, et al. Acta Metallurgica Sinica, 2020, 56(4), 549 (in Chinese). 刘振宝, 梁剑雄, 苏杰, 等. 金属学报, 2020, 56(4), 549. 11 Wang G. Research of hot forming on microstructure and properties of high strength stainless steel propeller. Master’s Thesis, Jimei University, China, 2015 (in Chinese). 王刚. 高强度不锈钢螺旋桨热成形微观结构与性能的研究. 硕士学位论文, 集美大学, 2015. 12 Guo Y D. Key Engineering Materials, 2016, 693, 800. 13 Ma N, Zhang Z H, Hu P, et al. Journal of Materials Engineering, 2011(5), 88 (in Chinese). 马宁, 张宗华, 胡平, 等. 材料工程, 2011(5), 88. 14 Lu C X, Yi H Y, Liang T, et al. Rare Metal Materials and Engineering, 2021, 50(1), 187 (in Chinese). 陆成旭, 易昊钰, 梁田, 等. 稀有金属材料与工程, 2021, 50(1), 187. 15 Guo Y D, Wang D Z, Wu H F, et al. Ship Engineering, 2019, 41(11), 105 (in Chinese). 郭幼丹, 王大镇, 吴华峰, 等. 船舶工程, 2019, 41(11), 105. 16 Guo Y D, Cheng X N. Rare Metal Materials and Engineering, 2022, 51(6), 2258 (in Chinese). 郭幼丹, 程晓农. 稀有金属材料与工程, 2022, 51(6), 2258. 17 Sun Q, Wang J, Li, H B. Journal of Iron and Steel Research International, 2016, 23, 1071. 18 Li H, Song Z G, Feng H, et al. Special Steel, 2015, 36(3), 57 (in Chinese). 李惠, 宋志刚, 丰涵, 等. 特殊钢, 2015, 36(3), 57. 19 He L, Wu X Y, Hang Z Y. International Journal of Electrochemical Science, 2016, 11, 8046. 20 Wu Tianhai. The precipitation of σ phase and its influence on microstructure and properties in 2205 duplex stain less steel. Master’s Thesis, Northeastern University, China, 2013 (in Chinese). 吴天海. 2205双相不锈钢中σ相的析出及其对组织性能的影响, 硕士学位论文, 东北大学, 2013. 21 Yang Y H, Yan B, Zheng X. Materials Reports, 2011, 25(19), 105 (in Chinese). 杨银辉, 严彪, 郑鑫. 材料导报, 2011, 25(19), 105.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2025, Vol. 39 
