稀土铈对22MnCrNiMo钢耐腐蚀性能的影响
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摘要
为了研究稀土对系泊链钢耐蚀性能的影响,冶炼铈含量不同的稀土系泊链钢,利用稀土在钢中的有利作用,力求进一步提高系泊链钢的耐蚀性能。试验用22MnCrNiMo稀土钢由10kg真空感应炉冶炼,热轧成17mm板坯,经930°C二次淬火加620°C回火处理,通过质量法、极化曲线法和交流阻抗法研究铈对22MnCrNiMo钢耐腐蚀性能的影响。结果表明,添加稀土铈后,不同铈含量试验钢的抗腐蚀性能均有所提高,钢中铈的最佳质量分数为0.143%。此含量下,试验钢组织的均一性最佳,钢中夹杂转变为稳定性高的稀土类球状夹杂,使得试验钢在任一浸泡周期内的腐蚀速率均为最小,除锈后的腐蚀痕迹最轻;容抗弧半径达到最大,即反应电阻到达最大;阳极极化曲线位于其他试验钢阳极极化曲线的左边,即阳极电流密度变小,反应阻力增大。所以铈可以提高22MnCrNiMo钢耐腐蚀性能,当钢中铈的质量分数为0.143%时,试验钢的抗腐蚀性能表现最佳。
In order to study the effect of rare earth on corrosion resistance of mooring chain steel,the mooring chain steel with different Ce content is smelted.Using the powerful function of rare earth in steel to further improve the corrosion resistance performance of mooring chain.The test steel 22 MnCrNiMo is melted by a 10 kg vacuum induction furnace,and then hot-rolled to 17 mm plate,secondary water-quenched at 930°C and tempered at 620°C.The effect of Ce on the corrosion resistance properties of steel 22 MnCrNiMo has been studied by using weight method,polarization curve and AC impedance method.The results show that the corrosion resistance of steel containing different Ce is improved after adding the rare earth Ce and the optimum Ce content in steel is 0.143%.Under this content,the microstructure of the experimental steel is more uniform,inclusions in steel are transformed into rare earth ball inclusions with high stability.So the corrosion rate of the steel in any corrosion period is the minimum,and the corrosion marks are the lightest after rust removal.The arc radius reaches the maximum,which indicates that the reaction resistance is also the greatest,the anodic polarization curve is located at the left of other steel anode polarization curves,indicating that with the decrease of the anode current density,the reaction resistance increases.Thus,Ce addition can improve the corrosion resistance properties of steel 22 MnCrNiMo,and as the Ce mass fraction is 0.143%,the steel 22 MnCrNiMo has the optimum corrosion-resisting properties.
In order to study the effect of rare earth on corrosion resistance of mooring chain steel,the mooring chain steel with different Ce content is smelted.Using the powerful function of rare earth in steel to further improve the corrosion resistance performance of mooring chain.The test steel 22 MnCrNiMo is melted by a 10 kg vacuum induction furnace,and then hot-rolled to 17 mm plate,secondary water-quenched at 930°C and tempered at 620°C.The effect of Ce on the corrosion resistance properties of steel 22 MnCrNiMo has been studied by using weight method,polarization curve and AC impedance method.The results show that the corrosion resistance of steel containing different Ce is improved after adding the rare earth Ce and the optimum Ce content in steel is 0.143%.Under this content,the microstructure of the experimental steel is more uniform,inclusions in steel are transformed into rare earth ball inclusions with high stability.So the corrosion rate of the steel in any corrosion period is the minimum,and the corrosion marks are the lightest after rust removal.The arc radius reaches the maximum,which indicates that the reaction resistance is also the greatest,the anodic polarization curve is located at the left of other steel anode polarization curves,indicating that with the decrease of the anode current density,the reaction resistance increases.Thus,Ce addition can improve the corrosion resistance properties of steel 22 MnCrNiMo,and as the Ce mass fraction is 0.143%,the steel 22 MnCrNiMo has the optimum corrosion-resisting properties.
引文
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[25] SHI F,TIAN P C,JIA N,et al.Effects of rare earth metals addition on the resistance to pitting corrosion of super duplex stainless steel[J].Corrosion Science,2016(107):49.
[26]林勤,李军,张路明.高强度耐大气腐蚀钢中稀土提高耐蚀机理研究[J].稀土,2008,29(1):63.
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[2]鹿守本.海洋资源与可持续发展[M].北京:中国科学技术出版社,1999.
[3]钱绪政.海洋工程用高级系泊链钢组织与耐蚀性性能研究[D].镇江:江苏科技大学,2009.
[4] Asano K,Ishikawa F,Uno K,et al.Fatigue properties of mooring chain for off shore structures[C]//In Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering.Tokyo:OMAE’86,1986:29.
[5] Ruben Pérez-Mora,Thierry Palin-Luc,Claude Bathias,et al.Very high cycle fatigue of a high strength steel under sea water corrosion:A strong corrosion and mechanical damage coupling[J].International Journal of Fatigue,2015(74):156.
[6] ZUO J H,WANG Z,HAN H.Effect of microstructure on ultra-high cycle fatigue behavior of Ti-6Al-4V[J].Mat Sci Eng A,2008,473:147.
[7] Ammar H R,Samuel A M,Samuel F H.Effect of casting imperfections on the fatigue life of 319-F and A356-T6Al-Si alloys[J].Mater Sci Eng A,2008,473:65.
[8] Pang H T,Reed P A S.Microstructure effects on high temperature fatigue crack initiation and short crack growth in turbine disc nickel-base superalloy Udimet 720Li[J].Mater Sci Eng A,2007,448:67.
[9]王龙妹,杜挺,卢先利.微量稀土元素在钢中的作用机理及应用研究[J].稀土,2001,22(4):37.
[10]杨吉春,曹晓恩,肖茂元.稀土Ce对X80管线钢电化学腐蚀行为的影响[J].腐蚀科学与防护技术,2013,25(4):271.
[11]余宗森.钢中稀土[M].北京:冶金工业出版社,1982.
[12]杨吉春,刘晓,高学中,等.稀土元素Ce对2Cr13不锈钢中夹杂物变性的影响[J].特殊钢,2007,28(3):30.
[13] SHANG G,QIANG Q,CHENG X H.Effect of rare earth elements on erosion resistance of nitrocarburized layers of38CrMoAl steel[J].Journal of Rare Earths,2004,22(3):406.
[14] WU Y M,WANG L M,DU T.Thermo dynamics of rare earth elements inliquid iron[J].Less Common Metal,1985,110:187.
[15]高建兵,常朋飞,张彬彬,等.铈对新型超级双相不锈钢2707HD夹杂物变性的影响[J].钢铁,2018,53(9):37.
[16]李娜,代威,王永强,等.铈对2.9%Si-0.8%Al无取向硅钢再结晶组织和织构的影响[J].钢铁,2018,53(10):67.
[17]李阳,杜鹏飞,姜周华,等.稀土对含铜锡铁素体不锈钢中非金属夹杂物的影响[J].钢铁,2018,53(10):32.
[18]李密文,郝新,郭洪飞.稀土Ce对5CrMnMo钢组织和性能的影响[J].材料热处理技术,2008,37(14):58.
[19]姜文勇,冯义成,王丽萍,等.稀土对Cr25Ni5Mo2Cu3REx双相钢组织和性能的影响[J].稀土,2013,34(2):56.
[20]文智.稀土Ce对T91钢组织及性能的影响[D].长沙:中南大学,2013.
[21]蔡元兴,刘科高,郭晓斐.常用金属材料的耐腐蚀性能[M].北京:冶金工业出版社,2012.
[22]黄建中,左禹.材料的耐蚀性和腐蚀数据[M].北京:化学工业出版社,2003.
[23]任娟红,陈安忠,李照国,等.439超纯铁素体不锈钢耐蚀性评价[J].中国冶金,2018,28(3):35.
[24]王建功,王晓东,周旬,等.铁素体轧制工艺热轧板显微组织研究与分析[J].中国冶金,2018,28(3):54.
[25] SHI F,TIAN P C,JIA N,et al.Effects of rare earth metals addition on the resistance to pitting corrosion of super duplex stainless steel[J].Corrosion Science,2016(107):49.
[26]林勤,李军,张路明.高强度耐大气腐蚀钢中稀土提高耐蚀机理研究[J].稀土,2008,29(1):63.
[27]刘秀晨,安成强.金属腐蚀学[M].北京:国防工业出版社,2002.
[28] YANG J,ZHOU D N,LI X M.Effect of rare earth on micorstructures and propertise of high speed steel with high carbon content[J].Journal of Iron and Steel Research,International,2007,14(1):47.
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