单道次大变形冷轧及退火处理对2205双相不锈钢组织和性能的影响

doi:10.13251/j.issn.0254-6051.2021.10.026

摘要/Abstract

摘要： 采用微观组织观察、X射线衍射分析、显微硬度及动电位极化曲线测量,研究了单道次大变形冷轧及退火处理对2205双相不锈钢组织和性能的影响。结果表明,单道次大变形冷轧引起晶粒沿轧制方向被严重拉长并明显破碎形成纤维状组织及高密度位错塞积,使试验材料的硬度显著提升约1.5倍,同时晶粒细化使得自腐蚀电流密度相对原始态试样降低了2%,在3.5%NaCl溶液中的耐蚀性略微提高。冷轧态试样经500 ℃退火4 h后能使组织细化至约300 nm,耐蚀性明显提高,自腐蚀电流密度相对原始态降低了33%。当退火温度升高至700 ℃,位错在两相组织中湮灭程度不均匀,相界处会析出σ相,并使硬度进一步升高,但对耐蚀性不利,自腐蚀电流密度相对原始态下降了3%。

关键词: 2205双相不锈钢, 形变退火, 硬度, 耐蚀性

Abstract: Effects of single-pass cold rolling with large deformation and annealing treatment on microstructure and properties of the 2205 duplex stainless steel were studied by means of microscopic observation, X-ray diffraction, Vickers microhardness and potentiodynamic polarization curve measurement. The results show that due to the single-pass cold rolling with large deformation, severely elongated grains are significantly broken to form fibrous microstructure and high-density dislocations pile-up, which significantly increases the hardness of the tested material by about 1.5 times, and the self-corrosion current density is 2% lower than that of the original specimen due to the grain refinement, the corrosion resistance of which in 3.5%NaCl solution is slightly improved. The cold-rolled specimen annealed at 500 ℃ for 4 h can refine the microstructure to about 300 nm, the corrosion resistance of which can significantly improve, and the self-corrosion current density reduces by 33% compared with original specimen. When the annealing temperature is increased to 700 ℃, the degree of dislocation annihilation in the two-phase microstructure is not uniform, the σ phase will precipitate at the phase boundary, and the hardness will be further increased, but it is not good for the corrosion resistance, and the self-corrosion current density decreases by 3% compared with original specimen.

Key words: 2205 duplex stainless steel, deformation annealing, hardness, corrosion resistance

中图分类号:

TG174.3

郭宇, 陈吉, 杨美桐. 单道次大变形冷轧及退火处理对2205双相不锈钢组织和性能的影响[J]. 金属热处理, 2021, 46(10): 151-154.

Guo Yu, Chen Ji, Yang Meitong. Effect of single pass large deformation cold rolling and annealing treatment on microstructure and properties of 2205 duplex stainless steel[J]. Heat Treatment of Metals, 2021, 46(10): 151-154.

参考文献

[1]Valiev R Z, Islamgaliev R K, Alexandrov I V. Bulk nanostructured materials from severe plastic deformation[J]. Progress in Materials Science, 2000, 45(2): 103-189.
[2]Lu K, Lu J. Surfacenanocrystallization (SNC) of metallic materials-presentation of the concept behind a new approach[J]. Journal of Materials Science and Technology, 1999, 15(3): 193-197.
[3]Meng G, Ying L, Wang F. The corrosion behavior of Fe-10Cr nanocrystalline coating[J]. Electrochimica Acta, 2006, 51(20): 4277-4284.
[4]Jinlong L, Tong Xiang, Chen W, et al. Comparison of corrosion properties of passive films formed on coarse grained and ultrafine grained AISI 2205 duplex stainless steels[J]. Journal of Electroanalytical Chemistry, 2015, 757: 263-269.
[5]李雪莉, 李瑛, 王福会. Fe-20Cr溅射纳米涂层的腐蚀电化学性能研究[J]. 中国腐蚀与防护学报, 2003, 23(2): 21-25.
Li Xueli, Li Ying, Wang Fuhui. Study on the electrochemical corrosion behavior of sputtered Fe-20Cr nanocrystalline coating[J]. Journal of Chinese Society for Corrosion and Protection, 2003,23(2): 21-25.
[6]朴楠, 陈吉, 尹成江, 等. 超细晶304L不锈钢在含(Cl^-)溶液中点蚀行为的研究[J]. 金属学报, 2015, 51(9): 1077-1084.
Piao Nan, Chen Ji, Yin Chengjiang, et al. Investigation on pitting corrosion behavior of ultrafine-grained 304L stainless steel in (Cl^-) containing solution[J]. Acta Metallurgica Sinica, 2015, 51(9): 1077-1084.
[7]李殊霞, 任学平, 卢子明. 冷轧变形量对2205双相不锈钢超塑性的影响[J]. 塑性工程学报, 2014, 21(4): 97-101.
Li Shuxia, Ren Xueping, Lu Ziming. Effect of cold rolling reduction on the superplasticity of 00Cr22Ni5Mo3N duplex stainless steel[J]. Journal of Plasticity Engineering, 2014, 21(4): 97-101.
[8]李殊霞, 任学平, 佟建国, 等. 2205双相不锈钢中σ相的析出规律[J]. 工程科学学报, 2015, 37(3): 312-316.
Li Shuxia, Ren Xueping, Tong Jianguo, et al. Precipitation law of σ phase in 2205 duplex stainless steel[J]. Journal of University of Science and Technology Beijing, 2015, 37(3): 312-316.
[9]吴天海, 刘春明, 姜周华, 等. 时效处理对2205 DSS组织及力学性能的影响[J]. 东北大学学报(自然科学版), 2016, 37(9): 1317-1321.
Wu Tianhai, Liu Chunming, Jiang Zhouhua, et al. Influence of ageing treatment on microstructures and mechanical properties of 2205 duplex stainless steel[J]. Journal of Northeastern University(Natural Science), 2016,37(9): 1317-1321.
[10]刘雄, 何燕霖, 丁秀平, 等. 高温时效对2205双相不锈钢中σ相析出行为的影响[J]. 材料热处理学报, 2010, 31(3): 48-51.
Liu Xiong, He Yanlin, Ding Xiuping, et al. Effect of high temperature aging on σ-phase precipitation in a 2205 duplex stainless steel[J]. Transactions of Materials and Heat Treatment, 2010, 31(3): 48-51.
[11]范君伟, 何晨冲, 李杰, 等. 时效处理对2205双相不锈钢耐点蚀性能的影响[J]. 上海金属, 2011, 33(4): 33-38.
Fan Junwei, He Chenchong, Li Jie, et al. Effect of aging treatment on the pitting corrosion resistance of 2205 duplex stainless steel[J]. Shanghai Metals, 2011, 33(4): 33-38.
[12]魏斌, 白真权, 尹成先, 等. 固溶处理对2205双相不锈钢点蚀性能的影响[J]. 材料热处理学报, 2009, 30(4): 73-76.
Wei Bin, Bai Zhenquan, Yin Chengxian, et al. Effects of solid solution treatment on pitting corrosion behavior of 2205 duplex stainless steel[J]. Transactions of Materials and Heat Treatment, 2009, 30(4): 73-76.
[13]李艳玲, 亢淑梅, 郭宏南, 等. 固溶处理对2205双相不锈钢耐蚀性能的影响[J]. 材料开发与应用, 2018, 33(1): 59-63.
Li Yanling, Kang Shumei, Guo Hongnan, et al. Effect of solid solution treatment on corrosion resistance of 2205 duplex stainless steel[J]. Development and Application of Materials, 2018, 33(1): 59-63.
[14]丁秀平, 刘雄, 何燕霖, 等. 时效条件下2205双相不锈钢中的析出相分析及其对冲击性能的影响[J]. 钢铁, 2010, 45(6): 84-87.
Ding Xiuping, Liu Xiong, He Yanlin, et al. Study of precipitation evolution in 2205 DSS during aging treatment and its effect on impact toughness[J]. Iron and Steel, 2010, 45(6): 84-87.
[15]宋红梅, 丁秀平, 刘雄, 等. 高温时效2205双相不锈钢中的组织转变[J]. 材料热处理学报, 2010, 31(3): 43-47.
Song Hongmei, Ding Xiuping, Liu Xiong, et al. Microstructure evolution in a 2205 duplex stainless steel during aging at high temperature[J]. Transactions of Materials and Heat Treatment, 2010, 31(3): 43-47.