短时时效处理对2205双相不锈钢显微组织和耐腐蚀性能的影响
Effect of Short-Time Aging Treatment on Microstructure and Corrosion Resistance of 2205 Duplex Stainless Steel
摘 要
对固溶态2205双相不锈钢进行800℃、不同时间（5~30 min）的短时时效处理，研究了时效时间对该钢显微组织和耐腐蚀性能的影响。结果表明：随着时效时间的延长，试验钢中富含铬、镍、钼的σ析出相数量增加，尺寸增大，且主要分布在铁素体和奥氏体相晶界处，少量分布在铁素体和奥氏体晶粒内；随着时效时间的延长，试验钢的晶间腐蚀敏感程度增加，点蚀电位降低，耐晶间腐蚀和耐点蚀性能降低。
显微组织
耐晶间腐蚀性能
耐点蚀性能
duplex stainless steel
microstructure
intergranular corrosion resistance
pitting corrosion resistance
Abstract
2205 duplex stainless steel in the solid solution state was treated by short-time aging at 800 ℃ for different times (5-30 min), and the effect of aging time on the microstructure and corrosion resistance of the steel was studied. The results show that the content of σ precipitate en-riched in chromium, nickel and molybdenum increased, and the size increased with increasing aging time; the σ phase mainly distributed on the ferrite and austenite phase boundaries, and a small amount distributed inside the ferrite and austenite crystals. With increasing aging time, the intergranular corrosion sensitivity of the test steel increased, and the pitting corrosion potential decreased, indicating the intergranular corrosion resistance and pitting corrosion resistance decreased.
中图分类号 TG156.92 DOI 10.11973/jxgccl202007018
所属栏目 材料性能及应用
基金项目 浙江省重点研发计划项目（2019C01091）
收稿日期 2020/1/2
修改稿日期 2020/6/2
网络出版日期
作者单位点击查看
备注赵锦(1980-),女,河北辛集人,工程师,硕士
引用该论文: ZHAO Jin,YAN Haitao,YANG Chunlong,MA Weijie. Effect of Short-Time Aging Treatment on Microstructure and Corrosion Resistance of 2205 Duplex Stainless Steel[J]. Materials for mechancial engineering, 2020, 44(7): 84～87
赵锦,颜海涛,杨春龙,马伟杰. 短时时效处理对2205双相不锈钢显微组织和耐腐蚀性能的影响[J]. 机械工程材料, 2020, 44(7): 84～87
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参考文献
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【2】王正樵, 吴幼林.不锈钢[M].北京:化学工业出版社,1991: 237-240.
【3】孙祺,王剑,何燕,等.时效时间对2205双相不锈钢中第二相析出行为的影响[J].金属热处理,2016,41(2):63-67.
【4】HE Y L,ZHU N Q,LU X G,et al.Experimental and computational study on microstructural evolution in 2205 duplex stainless steel during high temperature aging[J].Materials Science and Engineering:A,2010,528(2):721-729.
【5】DENG B,WANG Z Y,JIANG Y M,et al.Evaluation of localized corrosion in duplex stainless steel aged at 850℃ with critical pitting temperature measurement[J].Electrochimica Acta,2009,54(10):2790-2794.
【6】EL KOUSSY M R,EL MAHALLAWI I S,KHALIFA W,et al.Effects of thermal aging on microstructure and mechanical properties of duplex stainless steel weldments[J].Materials Science and Technology, 2004,20(3):375-381.
【7】曾洪涛,杨勇, 张程,等. σ相对2205双相不锈钢在热浓缩海水中点蚀性能的影响[C]//2018年全国腐蚀电化学及测试方法学术交流会论文集. 北京: 中国腐蚀与防护学会腐蚀电化学及测试方法专业委员会,2018:196-197.
【8】SUN Q,WANG J,LI H B,et al.Chi phase after short-term aging and corrosion behavior in 2205 duplex stainless steel[J].Journal of Iron and Steel Research International, 2016,23(10):1071-1079.
【9】LIU X,DING X P,HE Y L,et al.Experimental study and kinetic calculation on migration of γ/α interface boundary during high temperature aging for 2205 duplex stainless steel[J].Journal of Iron and Steel Research International, 2010,17(8):45-49.
【10】ZHANG S C,JIANG Z H,LI H B,et al.Detection of susceptibility to intergranular corrosion of aged super austenitic stainless steel S32654 by a modified electrochemical potentiokinetic reactivation method[J].Journal of Alloys and Compounds,2017,695:3083-3093.
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