微量元素Cr对船用耐蚀钢焊接接头组织和性能的影响
|
摘要
为了探讨货油舱下底板模拟腐蚀环境下微量元素Cr对耐蚀钢焊接接头组织、力学性能和腐蚀性能的影响,分别使用不含Cr的焊丝和含微量Cr的焊丝焊接耐蚀钢,对所得焊接接头进行研究.对比分析无Cr及含微量Cr的焊接接头的组织及性能.结果表明,Cr元素的微量添加在一定程度上抑制了先共析铁素体,并且细化了针状铁素体.焊缝中微量Cr的存在对接头的力学性能影响大,无论添加与否接头的抗拉强度均比母材抗拉强度要高,且冲击水平也未发生大的改变,硬度分布相似.焊缝中添加微量Cr元素并未明显改善它的耐腐蚀性,相反,使得焊缝金属自腐蚀电位下降、腐蚀速率增高.
To explore the effects of trace element Cr on microstructure,mechanical performances and corrosive nature of welded joints in the virtual environment in which the bottom plates of cargo oil tanks were taken as the prototype,different joints were researched by adding wires with Cr or without Cr. The corrosion rate of the joint was calculated by weight loss of the samples before and after corrosion.However,the micro and macro morphology of the corroded samples were described by scanning electron microscope( SEM) and optical microscope( OM),and the element distribution was measured by EDS.In addition,the polarization curve was measured in the preset corrosion environment. The results indicate that the minor addition of Cr inhibits the eutectoid ferrite to some extent and refines the acicular ferrite.The mechanical performance of the joints is little affected by the addition of Cr,and the tensile strength of the base metal is lower than that of the joint,and the shock level was not changed greatly. However the impact level is the same and the hardness distribution is similar. No significant changes are observed in anti-corrosion nature by adding trace amounts of Cr,but the corrosion potential of the weld metal decreases,meanwhile,the corrosion rate increases.
To explore the effects of trace element Cr on microstructure,mechanical performances and corrosive nature of welded joints in the virtual environment in which the bottom plates of cargo oil tanks were taken as the prototype,different joints were researched by adding wires with Cr or without Cr. The corrosion rate of the joint was calculated by weight loss of the samples before and after corrosion.However,the micro and macro morphology of the corroded samples were described by scanning electron microscope( SEM) and optical microscope( OM),and the element distribution was measured by EDS.In addition,the polarization curve was measured in the preset corrosion environment. The results indicate that the minor addition of Cr inhibits the eutectoid ferrite to some extent and refines the acicular ferrite.The mechanical performance of the joints is little affected by the addition of Cr,and the tensile strength of the base metal is lower than that of the joint,and the shock level was not changed greatly. However the impact level is the same and the hardness distribution is similar. No significant changes are observed in anti-corrosion nature by adding trace amounts of Cr,but the corrosion potential of the weld metal decreases,meanwhile,the corrosion rate increases.
引文
[1]SUN F L,LI X G,ZHANG F,et al.Corrosion mechanism of corrosion-resistant steel developed for bottom plate of cargo oil tanks[J].Acta Metallurgica Sinica(English Letters),2013,26(3):257-264.
[2]柳伟,樊学华,李少飞,等.油轮舱CO2-O2-H2S-SO2湿气环境中低合金钢的腐蚀行为[J].北京科技大学学报,2011,33(1):33-39.LIU W,FAN X H,LI S F,et al.Corrosion behavior of low alloy steels in a CO2-O2-H2S-SO2wet gas environment of crude oil tanks[J].Journal of University of Science and Technology Beijing,2011,33(1):33-39.(in Chinese)
[3]周鹏,梁金明,张飞,等.Cr对货油舱O2-CO2-SO2-H2S湿气环境下低合金钢腐蚀行为的影响[J].钢铁研究学报,2015,22(7):630-637.ZHOU P,LIANG J M,ZHANG F,et al,Influence of chromium on corrosion behavior of low-alloy steel in cargo oil tank O2-CO2-SO2-H2S wet gas environment[J].Journal of Iron and Steel Research,2015,22(7):630-637.(in Chinese)
[4]梁金明,唐荻,武会宾,等.含Cr低合金钢在货油舱下底板环境中的腐蚀行为[J].华南理工大学学报,2013,41(10):72-78.LIANG J M,TANG D,WU H B,et al.Environment corrosion behavior of cargo oil tank inner plate made of Crcontained low-alloy steel[J].Journal of South China University of Technology,2013,41(10):72-78.(in Chinese)
[5]刘晓童,武会宾,刘星海,等.Mo对货油舱下底板用E36级船板钢耐腐蚀性能的影响[J].热加工工艺,2014,43(2):1-4.LIU X T,WU H B,LIU X H,et al.Effect of Mo on corrosion performance of E36 steel for COT bottom plate[J].Hot Working Technology,2014,43(2):1-4.(in Chinese)
[6]王俊海.油船货油舱耐腐蚀钢专利分析[C]∥第十届中国钢铁年会暨第六届宝钢学术年会论文集.北京:中国金属学会,2015:1-7.WANG J H.Patent analysis of the corrosion resistant steel in the cargo oil tank[C]∥Proceedings of the Tenth China Iron&Steel Annual Conference and The Sixth Annual Conference of Bao Steel.Beijing:The Chinese Society for Metals,2015:1-7.(in Chinese)
[7]ITO M,KASHIMA K,HONDA T,et al.Corrosion resistant steel plate for crude oil tanker(NSGPTM)[J].Nippon Steel&Sumitomo Metal Technical Report,2015,110(9):84-89.
[8]姜爱华,陈亮,丁毅,等.焊接工艺对304不锈钢焊接接头耐晶间腐蚀性能的影响[J].铸造技术,2012,33(9):1097-1098.JIANG A H,CHEN L,DING Y,et al.Effect of welding process on intergranular corrosion resistance of 304stainless steel welded joints[J].Foundry Technology,2012,33(9):1097-1098.(in Chinese)
[9]曹国良,李国明,陈珊,等.典型耐海水腐蚀钢中Ni和Cr耐点蚀作用比较[J].金属学报,2010,46(6):748-754.CAO G L,LI G M,CHEN S,et al.Comparison on pitting corrosion resistance of nickel and chromium in typical sea water resistance steels[J].Acta Metallurgica Sinica,2010,46(6):748-754.(in Chinese)
[10]齐彦昌,彭云,田志凌,等.Ni对油船货油舱下底板焊缝耐蚀性的影响[J].材料热处理学报,2013,34(4):69-73.QI Y C,PENG Y,TIAN Z L,et al.Effect of Ni on corrosion resistance of welded metals for bottom plates of cargo oil tanks[J].Transactions of Materials and Heat Treatment,2013,34(4):69-73.(in Chinese)
[11]黄桂桥,戴明安.含铬低合金钢在海水中的腐蚀研究[J].腐蚀科学与防护技术,2000,12(6):315-318.HUANG G Q,DAI M A.Corrosion of chromium steels in sea water[J].Corrosion Science and Protection Technology,2000,12(6):315-318.(in Chinese)
[12]杨建炜,许静,曹建平.原油船货油舱用耐蚀钢及焊接接头腐蚀性能研究[J].腐蚀与防护,2012,33(2):39-43.YANG J W,XU J,CAO J P.Study on corrosion resistance of welding joints and corrosion resistant steel for crude oil cargo oil tank[J].Corrosion&Protection,2012,33(2):39-43.(in Chinese)
[13]孔小东,杨明波,朱梅五.冶金因素对低合金钢焊接接头耐蚀性的影响[J].焊接学报,2009,30(7):105-109.KONG X D,YANG M B,ZHU M W.Effect of metallurgical factors on corrosion resistance of welded joints of low alloy steel[J].Transactions of the China Welding Institution,2009,30(7):105-109.(in Chinese)
[14]薛迪.NSE36钢焊丝及接头腐蚀机理研究[D].昆明理工大学,2014.XUE D.Study on corrosion mechanism of NSE36 steel welding wire and joints[D].Kunming:Kunming University of Science and Technology,2014.(in Chinese)
[15]冯向阳,齐彦昌,彭云,等.货油舱用耐蚀钢焊接接头的耐腐蚀性能[J].钢铁研究学报,2012,24(3):44-49.FENG X Y,QI Y C,PENG Y,et al.Investigation on corrosion behaviors of anti-corrosion steels joints for cargo oil tanks[J].Journal of Iron and Steel Research,2012,24(3):44-49.(in Chinese)
[16]冯向阳.油船货油舱用耐蚀钢焊接接头耐蚀性的研究[D].西安:西安建筑科技大学,2012.FENG X Y.Investigation on corrosion behaviors of anticorrosion steels joints for cargo oil tanks[D].Xi'an:Xi'an University of Architecture and Technology,2012.(in Chinese)
[17]王佳,丁波,赵丹阳,等.E36高强船板钢的激光焊接及微观组织研究[J].热加工工艺,2014,43(1):36-38.WANG J,DING B,ZHAO D Y,et al.Research on laser welding process and joint microstructure of E36 highstrength steel plate[J].Hot Working Technology,2014,43(1):36-38.(in Chinese)
[18]顾长石,邱盛兴,闫璐,等.基于IMO标准的船用耐蚀钢研究综述[J].船舶工程,2015,37(10):1-20.GU C S,QIU S X,YAN L,et al.Review about study of corrosion resistant steel based on IMO standards[J].Ship Engineering,2015,37(10):1-20.(in Chinese)
[19]谭伟,徐滨士,韩文政,等.2Si Mn2Ti B超高强度钢焊接热影响区抗Cl-腐蚀性能[J].金属学报,2004,40(2):197-201.TAN W,XU B S,HAN W Z,et al.HAZ corrosion of2Si Mn2Ti B ultra strength steel weldment in 3.5%Na Cl solution[J].Acta Metallurgica Sinica,2004,40(2):197-201.(in Chinese)
[20]孔小东,杨明波,朱梅五,等.不同合金化体系的合金钢焊接接头的耐蚀性比较[J].金属铸锻焊技术,2010,39(13):34-37.KONG X D,YANG M B,ZHU M W,et al.Corrosion resistance of welded joints of alloy-steels with different alloying system[J].Casting·Forging·Welding,2010,39(13):34-37.(in Chinese)
[2]柳伟,樊学华,李少飞,等.油轮舱CO2-O2-H2S-SO2湿气环境中低合金钢的腐蚀行为[J].北京科技大学学报,2011,33(1):33-39.LIU W,FAN X H,LI S F,et al.Corrosion behavior of low alloy steels in a CO2-O2-H2S-SO2wet gas environment of crude oil tanks[J].Journal of University of Science and Technology Beijing,2011,33(1):33-39.(in Chinese)
[3]周鹏,梁金明,张飞,等.Cr对货油舱O2-CO2-SO2-H2S湿气环境下低合金钢腐蚀行为的影响[J].钢铁研究学报,2015,22(7):630-637.ZHOU P,LIANG J M,ZHANG F,et al,Influence of chromium on corrosion behavior of low-alloy steel in cargo oil tank O2-CO2-SO2-H2S wet gas environment[J].Journal of Iron and Steel Research,2015,22(7):630-637.(in Chinese)
[4]梁金明,唐荻,武会宾,等.含Cr低合金钢在货油舱下底板环境中的腐蚀行为[J].华南理工大学学报,2013,41(10):72-78.LIANG J M,TANG D,WU H B,et al.Environment corrosion behavior of cargo oil tank inner plate made of Crcontained low-alloy steel[J].Journal of South China University of Technology,2013,41(10):72-78.(in Chinese)
[5]刘晓童,武会宾,刘星海,等.Mo对货油舱下底板用E36级船板钢耐腐蚀性能的影响[J].热加工工艺,2014,43(2):1-4.LIU X T,WU H B,LIU X H,et al.Effect of Mo on corrosion performance of E36 steel for COT bottom plate[J].Hot Working Technology,2014,43(2):1-4.(in Chinese)
[6]王俊海.油船货油舱耐腐蚀钢专利分析[C]∥第十届中国钢铁年会暨第六届宝钢学术年会论文集.北京:中国金属学会,2015:1-7.WANG J H.Patent analysis of the corrosion resistant steel in the cargo oil tank[C]∥Proceedings of the Tenth China Iron&Steel Annual Conference and The Sixth Annual Conference of Bao Steel.Beijing:The Chinese Society for Metals,2015:1-7.(in Chinese)
[7]ITO M,KASHIMA K,HONDA T,et al.Corrosion resistant steel plate for crude oil tanker(NSGPTM)[J].Nippon Steel&Sumitomo Metal Technical Report,2015,110(9):84-89.
[8]姜爱华,陈亮,丁毅,等.焊接工艺对304不锈钢焊接接头耐晶间腐蚀性能的影响[J].铸造技术,2012,33(9):1097-1098.JIANG A H,CHEN L,DING Y,et al.Effect of welding process on intergranular corrosion resistance of 304stainless steel welded joints[J].Foundry Technology,2012,33(9):1097-1098.(in Chinese)
[9]曹国良,李国明,陈珊,等.典型耐海水腐蚀钢中Ni和Cr耐点蚀作用比较[J].金属学报,2010,46(6):748-754.CAO G L,LI G M,CHEN S,et al.Comparison on pitting corrosion resistance of nickel and chromium in typical sea water resistance steels[J].Acta Metallurgica Sinica,2010,46(6):748-754.(in Chinese)
[10]齐彦昌,彭云,田志凌,等.Ni对油船货油舱下底板焊缝耐蚀性的影响[J].材料热处理学报,2013,34(4):69-73.QI Y C,PENG Y,TIAN Z L,et al.Effect of Ni on corrosion resistance of welded metals for bottom plates of cargo oil tanks[J].Transactions of Materials and Heat Treatment,2013,34(4):69-73.(in Chinese)
[11]黄桂桥,戴明安.含铬低合金钢在海水中的腐蚀研究[J].腐蚀科学与防护技术,2000,12(6):315-318.HUANG G Q,DAI M A.Corrosion of chromium steels in sea water[J].Corrosion Science and Protection Technology,2000,12(6):315-318.(in Chinese)
[12]杨建炜,许静,曹建平.原油船货油舱用耐蚀钢及焊接接头腐蚀性能研究[J].腐蚀与防护,2012,33(2):39-43.YANG J W,XU J,CAO J P.Study on corrosion resistance of welding joints and corrosion resistant steel for crude oil cargo oil tank[J].Corrosion&Protection,2012,33(2):39-43.(in Chinese)
[13]孔小东,杨明波,朱梅五.冶金因素对低合金钢焊接接头耐蚀性的影响[J].焊接学报,2009,30(7):105-109.KONG X D,YANG M B,ZHU M W.Effect of metallurgical factors on corrosion resistance of welded joints of low alloy steel[J].Transactions of the China Welding Institution,2009,30(7):105-109.(in Chinese)
[14]薛迪.NSE36钢焊丝及接头腐蚀机理研究[D].昆明理工大学,2014.XUE D.Study on corrosion mechanism of NSE36 steel welding wire and joints[D].Kunming:Kunming University of Science and Technology,2014.(in Chinese)
[15]冯向阳,齐彦昌,彭云,等.货油舱用耐蚀钢焊接接头的耐腐蚀性能[J].钢铁研究学报,2012,24(3):44-49.FENG X Y,QI Y C,PENG Y,et al.Investigation on corrosion behaviors of anti-corrosion steels joints for cargo oil tanks[J].Journal of Iron and Steel Research,2012,24(3):44-49.(in Chinese)
[16]冯向阳.油船货油舱用耐蚀钢焊接接头耐蚀性的研究[D].西安:西安建筑科技大学,2012.FENG X Y.Investigation on corrosion behaviors of anticorrosion steels joints for cargo oil tanks[D].Xi'an:Xi'an University of Architecture and Technology,2012.(in Chinese)
[17]王佳,丁波,赵丹阳,等.E36高强船板钢的激光焊接及微观组织研究[J].热加工工艺,2014,43(1):36-38.WANG J,DING B,ZHAO D Y,et al.Research on laser welding process and joint microstructure of E36 highstrength steel plate[J].Hot Working Technology,2014,43(1):36-38.(in Chinese)
[18]顾长石,邱盛兴,闫璐,等.基于IMO标准的船用耐蚀钢研究综述[J].船舶工程,2015,37(10):1-20.GU C S,QIU S X,YAN L,et al.Review about study of corrosion resistant steel based on IMO standards[J].Ship Engineering,2015,37(10):1-20.(in Chinese)
[19]谭伟,徐滨士,韩文政,等.2Si Mn2Ti B超高强度钢焊接热影响区抗Cl-腐蚀性能[J].金属学报,2004,40(2):197-201.TAN W,XU B S,HAN W Z,et al.HAZ corrosion of2Si Mn2Ti B ultra strength steel weldment in 3.5%Na Cl solution[J].Acta Metallurgica Sinica,2004,40(2):197-201.(in Chinese)
[20]孔小东,杨明波,朱梅五,等.不同合金化体系的合金钢焊接接头的耐蚀性比较[J].金属铸锻焊技术,2010,39(13):34-37.KONG X D,YANG M B,ZHU M W,et al.Corrosion resistance of welded joints of alloy-steels with different alloying system[J].Casting·Forging·Welding,2010,39(13):34-37.(in Chinese)