Effect of Solution and Aging Treatment on Corrosion Resistance of HDR Duplex Stainless Steel
-
摘要: 为提高船舶用双相不锈钢在海水介质环境下的耐蚀性能,针对HDR双相不锈钢,采用固溶处理和时效处理工艺,通过3D显微镜、维氏硬度计、扫描电子显微镜、能谱仪等分析显微组织、成分、硬度和耐蚀性,研究其在3.5%NaCl溶液中的耐点腐蚀性能,从而确定合适的热处理工艺。结果表明:固溶温度为1 050 ℃～1 150 ℃时,时效处理促进脆性相σ析出,材料硬度提升;固溶温度为1 100 ℃时,HDR双相不锈钢耐点腐蚀性能最好;在1 050 ℃和1 150 ℃固溶温度条件下,时效处理明显削弱了不锈钢的耐蚀性。Abstract: In order to improve the corrosion resistance of marine duplex stainless steel in sea water environment, the HDR duplex stainless steel is treated by the solid solution and aging treatment, and the 3D microscope, Vickers hardness tester, scanning electron microscope, energy spectrometer and other instruments are used to analyze the microstructure, chemical compositions, hardness, and corrosion resistance. The corrosion resistance of the steel in 3.5% NaCl solution is studied, and the most suitable solution temperature determined. The results show that σphase is precipitated when the specimen is aged when the solid solution temperature is between 1 050 and 1 150 ℃ and the hardness of the specimen is promoted. When the solid solution temperature is 1 100 ℃, the specimen exhibits best pitting corrosion resistance. When the solid solution temperature is between 1 050 and 1 150℃, the aging treatment weakens the corrosion resistance of HDR duplex stainless steel.
-
-
[1] CHEN T H, YANG J R. Effects of solution treatment and continuous cooling on σ-phase precipitation in a 2205 duplex stainless steel[J]. Materials Science and Engineering:A, 2001, 311(1-2):28-41.
[2] 陈兴润, 潘吉祥. 固溶温度对2205双相不锈钢组织和点蚀性能的影响[J]. 金属热处理, 2014, 39(12):38-42. [3] 易朋, 胡永俊, 房卫萍, 等. 2205双相不锈钢双丝CMT焊缝组织和耐腐蚀性能[J]. 材料热处理学报, 2020, 41(5):183-188. [4] ORTIZ N, CURIEL F F, LÓPEZ V H, et al. Evaluation of the intergranular corrosion susceptibility of UNS S31803 duplex stainless steel with thermoelectric power measurements[J]. Corrosion Science, 2013, 69:236-244.
[5] SATHIRACHINDA N, PETTERSSON R, PAN J S. Depletion effects at phase boundaries in 2205 duplex stainless steel characterized with SKPFM and TEM/EDS[J]. Corrosion Science, 2009, 51(8):1850-1860.
[6] 徐美玲, 亢淑梅, 陈婷婷, 等. 固溶处理对2205双相不锈钢的耐蚀性的研究[J]. 兵器材料科学与工程, 2019, 42(5):78-81. [7] 吕杰晟, 宋志刚, 何建国, 等. S32205双相不锈钢冷轧退火组织转变及强塑化机理分析[J]. 金属热处理, 2022, 47(4):141-145. [8] YANG J, ZHANG T Y, YU J H, et al. Microstruc-ture characterization of duplex stainless steel welding joint with different solution and aging treatment[J]. Materials Science Forum, 2010, 658:376-379.
[9] DENG B, WANG Z Y, JIANG Y M, et al. Effect of thermal cycles on the corrosion and mechanical properties of UNS S31803 duplex stainless steel[J]. Corrosion Science, 2009, 51(12):2969-2975.
[10] 马丽, 要玉宏. 固溶温度对S32760双相不锈钢组织和拉伸性能的影响[J]. 热加工工艺, 2021, 50(16):112-116. [11] 石芳. 固溶处理对汽车用双相不锈钢组织与耐腐蚀性能的影响[J]. 热加工工艺, 2021, 50(10):119-121. [12] 杨晓禹, 田一清, 毛红奎, 等. 热处理工艺对双相不锈钢S32101焊接接头力学性能与微观组织的影响[J]. 热加工工艺, 2019, 48(21):153-155.
计量
- 文章访问数: 153
- HTML全文浏览量: 38
- PDF下载量: 88
下载:
