固溶处理和时效处理对HDR双相不锈钢耐蚀性的影响  

Effect of Solution and Aging Treatment on Corrosion Resistance of HDR Duplex Stainless Steel

作　　者：刘信[1] 胡裕龙[1] 刘念 苏小红 陈珊[1] LIU Xin;HU Yulong;LIU Nian;SU Xiaohong;CHEN Shan(Basic Department,Naval University of Engineering,Wuhan 430033,China;Navy 91247 Troops,Guangzhou 510000,China)

机构地区：[1]海军工程大学基础部,湖北武汉430033 [2]海军91247部队,广东广州510000

出　　处：《材料开发与应用》2023年第2期32-37,共6页Development and Application of Materials

基　　金：海军工程大学自主研发计划(425317T005)。

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1050℃~1150℃时,时效处理促进脆性相σ析出,材料硬度提升;固溶温度为1100℃时,HDR双相不锈钢耐点腐蚀性能最好;在1050℃和1150℃固溶温度条件下,时效处理明显削弱了不锈钢的耐蚀性。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 thatσphase is precipitated when the specimen is aged when the solid solution temperature is between 1050 and 1150℃and the hardness of the specimen is promoted.When the solid solution temperature is 1100℃,the specimen exhibits best pitting corrosion resistance.When the solid solution temperature is between 1050 and 1150℃,the aging treatment weakens the corrosion resistance of HDR duplex stainless steel.

关 键 词：HDR双相不锈钢 固溶处理 时效处理 耐蚀性 

分 类 号：TG146.1[一般工业技术—材料科学与工程]