Analysis and Prevention of Premature Corrosion Failure of Blower Impeller for Salt and Chemical Industry
摘 要
在显微组织和裂纹形貌观察的基础上,分析了盐化工风机叶轮早期腐蚀开裂失效的原因,并提出了预防措施。结果表明:叶轮失效是由在Cl-作用下的应力腐蚀开裂造成的;在叶轮本体上焊接扰流板后,焊接热循环使靠近熔合线的叶轮本体组织发生了显著变化,二次相的析出导致叶轮本体耐蚀性的降低,进而在工作应力和焊接残余应力联合作用下发生应力腐蚀开裂;叶轮本体上工作应力非均匀分布,越靠近叶轮心部,工作应力越大,越容易引发应力腐蚀开裂;提出了去除靠近叶轮心部4个扰流板的预防措施,经生产验证,此措施可预防叶轮的早期应力腐蚀开裂。
Abstract
On the basis of microstructure and crack morphology observation, the reason for premature corrosion cracking failure of a blower impeller for salt and chemical industry was analyzed. The results show that the failure of the impeller was due to stress corrosion cracking, which was promoted by chloride ions. The microstructure near the fusion line of the impeller body changed significantly by the weld thermal cycle after welding spoilers on the impeller body. The precipitation of secondary phases led to the degradation of corrosion resistance of the impeller body directly, and then the stress corrosion cracking occurred in the combination of working stresses and welding residual stresses. The working stresses on the impeller body distributed unevenly, that is, the closer to the impeller heart, the greater the work stresses were, and the more easily the stress corrosion cracking happened. A prevention method of removing the 4 spoilers near the impeller heart was proposed. It was verified by on-site application that this method can prevent the premature stress corrosion cracking of the impeller effectively.
中图分类号 TG142.71 DOI 10.11973/jxgccl201710021
所属栏目 失效分析
基金项目 江苏省科技厅产学研合作促进计划项目(BY2014103)
收稿日期 2016/6/14
修改稿日期 2017/5/8
网络出版日期
作者单位点击查看
备注孙少东(1967-),男,江苏淮安人,副教授,硕士
引用该论文: SUN Shaodong,HE Shijian,CHEN Wei,SHU Yun,WANG Xiang,WU Xinqiang. Analysis and Prevention of Premature Corrosion Failure of Blower Impeller for Salt and Chemical Industry[J]. Materials for mechancial engineering, 2017, 41(10): 98~102
孙少东,何时剑,陈玮,舒韵,王翔,吴欣强. 盐化工风机叶轮早期腐蚀失效的分析与预防[J]. 机械工程材料, 2017, 41(10): 98~102
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】NILSSON J O.Super duplex stainless steel[J].Materials Science and Technology, 1992, 8(8):685-700.
【2】ERIKSSON H,BERNHARDSSON S. The applicability of duplex stainless steels in sour environments[J]. Corrosion,1991,47(9):719-727.
【3】宾远红, 李培芬, 李志铮, 等. 不同固溶温度对双相不锈钢σ相析出及冲击韧性的影响[J].材料热处理学报, 2013,34(8):136-141.
【4】何进, 宴敏胜, 杨丽景, 等. S32750超级双相不锈钢在NaCl溶液中的临界点蚀温度及电化学腐蚀机理[J]. 中国腐蚀与防护学报, 2015, 35(4): 106-112.
【5】HERTZMAN J S, FERREIRA P J, BROLUND B.An experimental and theoretical study of heat-affected zone austenite reformation in three duplex stainless steels[J]. Metallurgical and Materials Transactions A, 1997, 28(2):277-285.
【6】CHEN T H, YANG J R. Effects of solution treatment and continuous cooling on sigma phase precipitation in a 2205 duplex stainlesssteel[J]. Materials Science and Engineering A, 2001, 311: 28-41.
【7】AKISANYA A R, OBI U, NEILL C R. Effect of ageing on phase evolution and mechanical properties of a high tungsten super-duplex stainless steel[J]. Materials Science and Engineering A, 2012, 535: 281-289.
【8】韩志诚, 王少刚, 胡经洪, 等. 焊接工艺对2205双相不锈钢接头组织与性能的影响[J]. 材料工程, 2008(8): 48-51.
【9】吴玖. 双相不锈钢[M]. 北京: 冶金工业出版社, 1999.
【10】LOPEZ N, CID M, PUIGGALI M. Influence of sigma-phase on mechanical properties and corrosion resistance of duplex stainless steels[J]. Corrosion Science, 1999,41(8): 1615-1631.
【11】龚佳. 典型不锈钢微观组织演变与腐蚀性能的研究[D]. 上海: 复旦大学, 2011.
【12】LEE J B. Effects of alloying elements Cr, Mo and N on repassivation characteristics of stainless steels using the abrading electrode technique[J]. Materials Chemistry and Physics, 2006, 99: 224-234.
【13】谭华. 双相不锈钢焊缝组织演变与腐蚀行为研究[D]. 上海: 复旦大学, 2012.
【14】刘杏, 杨武. 天然气长输管线应力腐蚀破裂的敏感环境条件[J]. 机械工程材料, 2002, 26(1): 5-12.
【15】褚武扬, 乔利杰, 肖纪美. 应力腐蚀机理研究[J]. 北京科技大学学报, 1992, 14(2): 212-219.
【16】李庆荣. 等厚圆盘匀角速转动时的内应力分析[J]. 计算机工程, 1982(2): 9-13.
【2】ERIKSSON H,BERNHARDSSON S. The applicability of duplex stainless steels in sour environments[J]. Corrosion,1991,47(9):719-727.
【3】宾远红, 李培芬, 李志铮, 等. 不同固溶温度对双相不锈钢σ相析出及冲击韧性的影响[J].材料热处理学报, 2013,34(8):136-141.
【4】何进, 宴敏胜, 杨丽景, 等. S32750超级双相不锈钢在NaCl溶液中的临界点蚀温度及电化学腐蚀机理[J]. 中国腐蚀与防护学报, 2015, 35(4): 106-112.
【5】HERTZMAN J S, FERREIRA P J, BROLUND B.An experimental and theoretical study of heat-affected zone austenite reformation in three duplex stainless steels[J]. Metallurgical and Materials Transactions A, 1997, 28(2):277-285.
【6】CHEN T H, YANG J R. Effects of solution treatment and continuous cooling on sigma phase precipitation in a 2205 duplex stainlesssteel[J]. Materials Science and Engineering A, 2001, 311: 28-41.
【7】AKISANYA A R, OBI U, NEILL C R. Effect of ageing on phase evolution and mechanical properties of a high tungsten super-duplex stainless steel[J]. Materials Science and Engineering A, 2012, 535: 281-289.
【8】韩志诚, 王少刚, 胡经洪, 等. 焊接工艺对2205双相不锈钢接头组织与性能的影响[J]. 材料工程, 2008(8): 48-51.
【9】吴玖. 双相不锈钢[M]. 北京: 冶金工业出版社, 1999.
【10】LOPEZ N, CID M, PUIGGALI M. Influence of sigma-phase on mechanical properties and corrosion resistance of duplex stainless steels[J]. Corrosion Science, 1999,41(8): 1615-1631.
【11】龚佳. 典型不锈钢微观组织演变与腐蚀性能的研究[D]. 上海: 复旦大学, 2011.
【12】LEE J B. Effects of alloying elements Cr, Mo and N on repassivation characteristics of stainless steels using the abrading electrode technique[J]. Materials Chemistry and Physics, 2006, 99: 224-234.
【13】谭华. 双相不锈钢焊缝组织演变与腐蚀行为研究[D]. 上海: 复旦大学, 2012.
【14】刘杏, 杨武. 天然气长输管线应力腐蚀破裂的敏感环境条件[J]. 机械工程材料, 2002, 26(1): 5-12.
【15】褚武扬, 乔利杰, 肖纪美. 应力腐蚀机理研究[J]. 北京科技大学学报, 1992, 14(2): 212-219.
【16】李庆荣. 等厚圆盘匀角速转动时的内应力分析[J]. 计算机工程, 1982(2): 9-13.
相关信息