等温退火工艺对2205钢耐点蚀性能的影响
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摘要
通过借助光学显微镜(OM)、扫描电镜(SEM)及挂片耐点腐蚀试验,研究了2205钢经过等温退火后其抗点蚀性能的变化。结果表明:当材料在650℃进行等温退火24 h后,材料的耐点腐蚀性能大大下降,经进一步分析,其主要原因与铁素体相、奥氏体相两相晶界处生成的析出沉淀相R相直接相关;当材料在550℃进行等温退火24 h后,显微组织未发生明显变化。
The descending of pitting corrosion resistance of 2205 steel after isothermal annealing was studied by means of optical microscope (OM),scanning electron microscope (SEM). The results show that the corrosion resistance of the material decreases greatly after isothermal annealing at 650 ℃ for 24 h. The main reason is directly related to the precipitation of R-phase formed at the boundary between ferrite and austenite; the microstructure of the material did not change significantly after isothermal annealing at 550 ℃ at 24 h.
The descending of pitting corrosion resistance of 2205 steel after isothermal annealing was studied by means of optical microscope (OM),scanning electron microscope (SEM). The results show that the corrosion resistance of the material decreases greatly after isothermal annealing at 650 ℃ for 24 h. The main reason is directly related to the precipitation of R-phase formed at the boundary between ferrite and austenite; the microstructure of the material did not change significantly after isothermal annealing at 550 ℃ at 24 h.
引文
[1]雒设计,王荣.热处理工艺对22Cr双相不锈钢组织的影响[J].机械工程材料,2007,31(2):13-15Luo Sheji,Wang Rong.Effects of heat treatment processes on microstructure of 22Cr duplex stainless steel[J].Materials for Mechanical Engineering,2007,31(2):13-15.
[2]石树坤,王均,李海丰,等.时效对2205不锈钢在模拟气田地层水中的电化学性能影响[J].材料热处理学报,2012,33(1):74-79.Shi Shukun,Wang Jun,Li Haifeng,et al.Effect of aging on electrochemical corrosion behavior of 2205 steel in simulated formation water[J].Transactions of Materials and Heat Treatment,2012,33(1):74-79.
[3]韩冬,蒋益明,邓博,等.时效时间对2101电化学腐蚀行为的影响[J].金属学报,2009,45(8):919-923.Han Dong,Jiang Yiming,Deng Bo,et al.Effect of aging time on electrochemical corrosion behavior of 2101 duplex stainless steel[J].Acta Metallurgica Sinica,2009,45(8):919-923.
[4]张忠和.2205不锈钢的点腐蚀试验的研究[J].机械制造与自动化,2004,33(4):57-59.Zhang Zhonghe.The test of dot taint for 2205 stainless steel[J].Machine Building and Automation,2004,33(4):57-59.
[5]韩茜,杨君刚,荣欢,等.均匀化退火对Mg-x Al-Zn合金组织与硬度的影响[J].金属热处理,2016,41(6):67-72.Han Xi,Yang Jungang,Rong Huan,et al.Influence of homogenized annealing on microstructure and hardness of Mg-x Al-Zn alloy[J].Heat Treatment of Metals,2016,41(6):67-72.
[6]刘雄,何燕霖,丁秀平,等.高温时效对2205双相不锈钢组织中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 onσ-phase precipitation in a 2205 duplex stainless steel[J].Transaction of Materials and Heat Treatment,2010,31(3):48-51.
[7]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].Transaction of Materials and Heat Treatment,2009,30(4):73-76.
[8]付燕,林昌健,罗亦旋,等.双相不锈钢在含硝酸体系中的优选腐蚀行为研究[J].中国腐蚀与防护学报,2004,24(5):272-275.Fu Yan,Lin Changjian,Luo Yixuan,et al.A study on the selective dissolution behavior of duplex stainless steel in systems containing nitric acid[J].Journal of Chinese Society for Corrosion and Protection,2004,24(5):272-275.
[2]石树坤,王均,李海丰,等.时效对2205不锈钢在模拟气田地层水中的电化学性能影响[J].材料热处理学报,2012,33(1):74-79.Shi Shukun,Wang Jun,Li Haifeng,et al.Effect of aging on electrochemical corrosion behavior of 2205 steel in simulated formation water[J].Transactions of Materials and Heat Treatment,2012,33(1):74-79.
[3]韩冬,蒋益明,邓博,等.时效时间对2101电化学腐蚀行为的影响[J].金属学报,2009,45(8):919-923.Han Dong,Jiang Yiming,Deng Bo,et al.Effect of aging time on electrochemical corrosion behavior of 2101 duplex stainless steel[J].Acta Metallurgica Sinica,2009,45(8):919-923.
[4]张忠和.2205不锈钢的点腐蚀试验的研究[J].机械制造与自动化,2004,33(4):57-59.Zhang Zhonghe.The test of dot taint for 2205 stainless steel[J].Machine Building and Automation,2004,33(4):57-59.
[5]韩茜,杨君刚,荣欢,等.均匀化退火对Mg-x Al-Zn合金组织与硬度的影响[J].金属热处理,2016,41(6):67-72.Han Xi,Yang Jungang,Rong Huan,et al.Influence of homogenized annealing on microstructure and hardness of Mg-x Al-Zn alloy[J].Heat Treatment of Metals,2016,41(6):67-72.
[6]刘雄,何燕霖,丁秀平,等.高温时效对2205双相不锈钢组织中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 onσ-phase precipitation in a 2205 duplex stainless steel[J].Transaction of Materials and Heat Treatment,2010,31(3):48-51.
[7]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].Transaction of Materials and Heat Treatment,2009,30(4):73-76.
[8]付燕,林昌健,罗亦旋,等.双相不锈钢在含硝酸体系中的优选腐蚀行为研究[J].中国腐蚀与防护学报,2004,24(5):272-275.Fu Yan,Lin Changjian,Luo Yixuan,et al.A study on the selective dissolution behavior of duplex stainless steel in systems containing nitric acid[J].Journal of Chinese Society for Corrosion and Protection,2004,24(5):272-275.