Effect of solution temperature on mechanical properties and corrosion resistance of super duplex stainless steel 2507

doi:10.13251/j.issn.0254-6051.2022.06.001

Abstract

Abstract: Effect of solution temperature on microstructure, mechanical properties and corrosion resistance of 2507 super duplex stainless steel was investigated by using optical microscope, scanning electron microscopy, XRD, tensile test and electrochemical analysis. The thermodynamic equilibrium phase diagram of the 2507 duplex stainless steel was calculated by Thermo-Calc thermodynamic software and compared with the test results. The results show that σ phase can be eliminated by solution treatment at temperatures higher than 1050 ℃. With the increase of solution temperature, the content of ferrite phase increases, the content of austenite phase decreases, and the volume fraction ratio of α/γ increases. The duplex stainless steel has better comprehensive mechanical properties after solution treatment at 1050-1100 ℃ for 30 min and water cooling, of which the yield strength, tensile strength and elongation are more than 600 MPa, 840 MPa and 35%, respectively. The duplex stainless steel can obtain better corrosion resistance after solution treatment at 1050 ℃ for 30 min.

Key words: super duplex stainless steel 2507, solution treatment, phase ratio, mechanical properties, corrosion resistance

CLC Number:

Gu Guochao, Li Ruifen, Xin Zhenmin, Xiang Lixin, Xu Wenhua, Lü Yupeng. Effect of solution temperature on mechanical properties and corrosion resistance of super duplex stainless steel 2507[J]. Heat Treatment of Metals, 2022, 47(6): 1-6.

References

[1]Song Zhigang, Feng Han, Hu Shaomei. Development of Chinese duplex stainless steel in recent years[J]. Journal of Iron and Steel Research, 2017, 24(2): 121-130.
[2]刘振宝, 梁剑雄, 苏杰, 等. 高强度不锈钢的研究及发展现状[J]. 金属学报, 2020, 56(4): 549-557.
Liu Zhenbao, Liang Jianxiong, Su Jie, et al. Research and application progress in ultra-high strength stainless steel[J]. Acta Metallurgica Sinica, 2020, 56(4): 549-557
[3]蔺晓亮, 陈兴润, 王宝君, 等. 固溶温度对S32750双相不锈钢组织和力学性能的影响[J]. 金属热处理, 2019, 44(12): 165-169.
Lin Xiaoliang, Chen Xingrun, Wang Baojun, et al. Effect of solution temperature on microstructure and mechanical properaties of S32750 duplex stainless steel[J]. Heat Treatment of Metals, 2019, 44(12): 165-169.
[4]白青青, 张志宏. 固溶处理温度对2507超级双相不锈钢相比例及力学性能的影响[J]. 金属热处理, 2019, 44(9): 123-127.
Bai Qingqing, Zhang Zhihong. Effect of solution treatment temperature on phase ration and mechanical properties of 2507 super duplex stainless steel[J]. Heat Treatment of Metals, 2019, 44(9): 123-127.
[5]张寿禄, 袁刚, 韩静涛. 超级双相不锈钢00Cr25Ni7Mo4N固溶热处理组织的研究[J]. 物理测试, 2010, 28(3): 9-11.
Zhang Shoulu, Yuan Gang, Han Jingtao. Microstructure of super duplex stainless steel 00Cr25Ni7Mo4N after solution treatment[J]. Physics Examination and Testing, 2010, 28(3): 9-11.
[6]李国平, 李俊, 张威, 等. 固溶温度对超级双相不锈钢S32750板材组织和耐蚀性的影响[J]. 特殊钢, 2009, 30(2): 61-62.
Li Guoping, Li Jun, Zhang Wei, et al. Influence of solution temperature on structure and corrosion resistance of plate of super duplex stainless steel S32750[J]. Special Steel, 2009, 30(2): 61-62.
[7]李俊. 固溶处理对超级双相不锈钢S32750组织和性能的影响[J]. 特殊钢, 2012, 33(4): 64-66.
Li Jun. Effect of solid solution treatment on structure and properties of super duplex stainless steel S32750[J]. Special Steel, 2012, 33(4): 64-66.
[8]郑添义, 陈宁. 冷却速率对2507 SDSS微观组织和力学性能的影响[J]. 船舶工程, 2021, 43(4): 106-112.
Zheng Tianyi, Chen Ning. Effect of cooling rate on microstructure and mechanical properties of 2507 SDSS[J]. Ship Engineering, 2021, 43(4): 106-112.
[9]何婵, 邹德宁, 赵洁, 等. 2507超级双相不锈钢的流变应力本构关系及热加工图[J]. 金属热处理, 2022, 47(1): 94-99.
He Chan, Zou Dening, Zhao Jie, et al. Flow stress constitutive relationship and processing map of super duplex stainless steel 2507[J]. Heat Treatment of Metals, 2022, 47(1): 94-99.
[10]梁丽霞, 赵宏伟, 康喜英, 等. 变形温度对超级双相不锈钢S32750性能的影响[J]. 金属热处理, 2018, 43(9): 191-194.
Liang Lixia, Zhao Hongwei, Kang Xiying, et al. Effect of deformation temperature on properties of super duplex stainless steel S32750[J]. Heat Treatment of Metals, 2018, 43(9): 191-194.
[11]刘富强, 高杰, 叶丙义, 等. 变形量和固溶处理对S32707双相不锈钢组织和性能的影响[J]. 金属热处理, 2017, 42(6): 123-126.
Liu Fuqiang, Gao Jie, Ye Bingyi, et al. Effects of deformation and solution treatment on microstructure and mechanical properties of S32707 duplex stainless steel[J]. Heat Treatment of Metals, 2017, 42(6): 123-126.
[12]Jang Minho, Moon Joonoh, Lee Taeho, et al. Effect of nitrogen partitioning on yield strength in nitrogen-alloyed duplex stainless steel during annealing[J]. Metallurgical and Materials Transactions A, 2014, 45(4): 1653-1658.
[13]高晓丹, 李晶琨, 任学平, 等. 固溶温度对2205双相不锈钢组织和硬度的影响[J]. 金属热处理, 2021, 46(1): 7-10.
Gao Xiaodan, Li Jingkun, Ren Xueping, et al. Effect of solid solution temperature on microstructure and microhardness of 2205 duplex stainless steel[J]. Heat Treatment of Metals, 2021, 46(1): 7-10.
[14]刘爽, 宋志刚, 王曼, 等. 固溶处理温度对超级双相不锈钢UNS S32750的耐点蚀性能与显微组织的影响[J]. 金属热处理, 2018, 43(12): 126-130.
Liu Shuang, Song Zhigang, Wang Man, et al. Effect of solution treatment temperature on pitting corrosion resistance and microstructure of super duplex stainless steel UNS S32750[J]. Heat Treatment of Metals, 2018, 43(12): 126-130.

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