齐亮,赵爱民,赵征志

• 1:北京科技大学冶金工程研究院
• 2:江西理工大学材料科学与工程学院

摘要(Abstract)：

运用拉伸、冲击、SEM、TEM和EDS等测试方法,对添加稀土镧和未添加稀土镧的Nb-Ti-Mo系管线钢进行研究,分析稀土元素和卷取温度对组织和性能的影响。结果表明:稀土元素镧能有效的改善夹杂物的形貌,在铸坯中形成由Al、Mn、O、S、La组成的复合夹杂物,并最终提高管线钢的低温冲击韧性;两种管线钢的强度均随着卷取温度的降低而升高,且添加稀土镧的Nb-Ti-Mo系管线钢的强度上升趋势更为显著;并且镧能够提高管线钢低温卷取时获得板条贝氏体的能力,精细结构中观察到有200～900 nm的亚板条结构,M/A组元中马氏体为孪晶结构。

关键词(KeyWords)： 稀土元素;管线钢;高韧性;夹杂物

Abstract:

Keywords:

基金项目(Foundation): 国家“十一五”科技支撑计划(2006BAE03A06)

作者(Author): 齐亮,赵爱民,赵征志

DOI: 10.13289/j.issn.1009-6264.2012.12.017

参考文献(References)：

• [1]杜则裕.高强度管线钢X100的研究进展[J].焊接技术,2006,35(S):1-3.DU Ze-yu.Research and development of X100 high grade pipeline steel[J].Weld Technol,2006,35(S):1-3.
• [2]潘家华.全球能源变换及管线钢的发展趋势[J].焊管,2008,31(1):9-11.PAN Jia-hua.Transformation of globe energy&developing trend of pipeline steel[J].Welded Pipe Tube,2008,31(1):9-11.
• [3]王龙妹.稀土元素在新一代高强韧钢中的作用和应用前景[J].中国稀土学报,2004,22(1):48-53.WANG Long-mei.Application prospects and behavior of RE in new generation high strength steels with superior toughness[J].J China Rare EarthSoc,2004,22(1):48-53.
• [4]刘晓,杨吉春,高学中.稀土对2Cr13不锈钢夹杂物的变质及对冲击韧性的影响[J].北京科技大学学报,2010,32(5):605-609.LIU Xiao,YANG Ji-chun,GAO Xue-zhong.Effects of RE on the inclusions and impact toughness of 2Cr13 stainless steel[J].Journal of University ofScience and Technology Beijing,2010,32(5):605-609.
• [5]张芳,杨吉春,刘亚辉.镧提高SS400钢力学性能作用机理研究[J].稀土,2009,30(5):44-48.ZHANG Fang,YANG Ji-chun,LIU Ya-hui.Effect of lanthanum on the mechanical properties of SS400 steel[J].Chinese Rare Earths,2009,30(5):44-48.
• [6]肖寄光,程慧静,王福明.稀土对船板钢组织及低温韧性的影响[J].稀土,2010,31(5):52-58.XIAO Ji-guang,CHENG Hui-jing,WANG Fu-ming.Effects of rare earth in ship hull plate steel on its microstructure and low temperature toughness[J].Chinese Rare Earths,2010,31(5):52-58.
• [7]孙昊,计云萍,陈林.稀土Ce对X65管线钢组织和性能的影响[J].过程工程学报,2010,10(2):240-244.SUN Hao,JI Yun-ping,CHEN Lin.Effect of rare earth Ce on microstructure and properties of X65 pipeline steels[J].The Chinese Journal of ProcessEngineering,2010,10(2):240-244.
• [8]郭锋,林勤,孙学义.镧、磷在稀土碳纯净钢凝固过程中的偏析和相互作用[J].中国稀土学报,2004,22(S):51-54.GUO Feng,LIN Qin,SUN Xue-yi.Interaction of La,P during solidification of carbon-manganese purity steels with rare earth[J].Journal of ChineseSociety of Rare Earths,2004,22(S):51-54.
• [9]陈冬火,林勤,郭锋.高镧稀土添加剂在16Mn钢中的应用[J].北京科技大学学报,2004,26(6):600-603.CHEH Dong-huo,LIN Qin,GUO Feng.Effect of high-La rare earth additives on properties of 16Mn steel[J].Journal of University of Science andTechnology Beijing,2004,26(6):600-603.
• [10]崔约贤,王长利.金属断口分析[M].哈尔滨:哈尔滨工业大学出版社,1998.
• [11]Hong L L,Cheng J L,Mao F J.Effect of rare earths on impact toughness of a low-carbon steel[J].Materials and Design,2011,(33)5:306-312.
• [12]杜挺,韩其勇,王常珍.稀土碱土等元素的物理化学及在材料中的应用[M].北京:科学出版社,1995.
• [13]梁益龙,雷敏,陈伦军,等.稀土对GDL-1型贝氏体钢的显微组织及力学性能的影响[J].材料热处理学报,2006,27(6):95-98.LIANG Yi-long,LEI Min,CHEN Lun-jun,et al.Effects of rare earth on microstructure and mechanical propertiesof GDL-1 bainite steel[J].Transactions of Materials and Heat Treatment,2006,27(6):95-98.

文章评论(Comment)：