X70管线钢焊接接头断裂韧性分析
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摘要
裂纹尖端张开位移(CTOD)试验常被用来进行材料的韧性评价。详细介绍了CTOD试验的过程、操作步骤及计算拟合方法。并采用裂纹尖端张开位移试验对X70管线钢焊接接头处焊缝、热影响区(HAZ)和母材进行了断裂韧性的测试研究。结果表明,在同一温度下,CTOD特征值δ0.05,δ0.2和δ0.2BL均呈现母材最大、热影响区次之、焊缝最小,即母材断裂韧性最优、热影响区次之、焊缝最差。
The crack tip opening displacement(CTOD) test is usually used to evaluate material toughness. In this article, it detailedly introduced CTOD test procedure, operation steps and fitting method of calculation. In addition, it adopted CTOD test to conduct fracture toughness study for the weld in welded joints, HAZ and base metal of X70 Pipeline steel. The result showed that under the same temperature, the CTOD characteristic values δ0.05,δ0.2 and δ0.2BL of base metal is the highest, the HAZ is the second,and the weld is the lowest, that is to say the fracture toughness of base metal is the best, the fracture toughness of HAZ is better than that of weld, and the weld is the worst.
The crack tip opening displacement(CTOD) test is usually used to evaluate material toughness. In this article, it detailedly introduced CTOD test procedure, operation steps and fitting method of calculation. In addition, it adopted CTOD test to conduct fracture toughness study for the weld in welded joints, HAZ and base metal of X70 Pipeline steel. The result showed that under the same temperature, the CTOD characteristic values δ0.05,δ0.2 and δ0.2BL of base metal is the highest, the HAZ is the second,and the weld is the lowest, that is to say the fracture toughness of base metal is the best, the fracture toughness of HAZ is better than that of weld, and the weld is the worst.
引文
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[11]ZIMMERMANTE.地下管道的压缩应变极限[C]//OMAN1995论文集(第5卷).廊坊:[s.n.],1995:375-378.
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[13]BS 7448:1991,Fracture Mechanics Toughness Tests,Part1,Method for Determination of KIC,Critical DTOD and J Values of Metallic Materials[S].
[14]舒玮,王学敏,李书瑞,等.焊接热影响区针状铁素体的形核长大及其对组织的细化作用[J].金属学报,2011,47(04):435-441.
[15]陈延清.X80高钢级管线钢埋弧焊丝的研究[D].天津:天津大学,2010.
[16]毕宗岳,杨军,牛靖,等.X100高强管线钢焊接接头的断裂韧性[J].金属学报,2013,49(05):576-582.
[2]李鹤林,吉玲康,谢丽华.中国石油管的发展现状分析[J].河北科技大学学报,2006,27(01):1-5.
[3]张斌,钱成文,王玉梅,等.国内外高钢级管线钢的发展及应用[J].石油工程建设,2012,38(01):1-5.
[4]DEMOFONTI G,MANNUCCI G,HILLEBRAND H G,et al.Evaluation of the Suitability of X100 Steel Pipes for High Pressure Gas Transportation Pipelines by Full Scal Tests[DB/DI].http://www.Eprg.Net/excange/news/pnews42/news detail.html.
[5]JANG YONG YAO,SEONG SAO AHN,DONG HAN SEO,et al.New Development of High Grade X80 to X120Pipeline Steels[J].Materials and Manufacturing Processes,2011,26(01):154-160.
[6]余志峰,史航,佟雷,等.基于应变设计方法在西气东输二线的应用[J].油气储运,2010,29(02):143-147.
[7]李鹤林,李霄,吉玲康,等.油气管道基于应变的设计及抗大变形管线钢的开发与应用[J].焊管,2007,30(05):5-11.
[8]马家鑫,皇甫严凯,杨专钊,等.油气输送钢管硫化物应力腐蚀开裂试验评定标准探讨[J].焊管,2013,36(03):61-64.
[9]申坤,王斌.TRIP效应在基于应变设计的大变形管线钢中的应用[J].焊管,2013,36(03):11-14.
[10]DENYS R M.大直径X65/X70钢制管道焊缝焊接焊缝的失效特点和缺陷容许水平:通过宽板试验进行实验验证以及与ECA预测模型进行对比[C]//管道技术会议论文集(第1卷).廊坊:[s.n.],2000:151-167.
[11]ZIMMERMANTE.地下管道的压缩应变极限[C]//OMAN1995论文集(第5卷).廊坊:[s.n.],1995:375-378.
[12]SUZUKI N,TOYODA M.地下管道上的地震载荷与高强度管道的变形能力[C]//管道技术会议论文集.廊坊:[s.n.],2004:601-628.
[13]BS 7448:1991,Fracture Mechanics Toughness Tests,Part1,Method for Determination of KIC,Critical DTOD and J Values of Metallic Materials[S].
[14]舒玮,王学敏,李书瑞,等.焊接热影响区针状铁素体的形核长大及其对组织的细化作用[J].金属学报,2011,47(04):435-441.
[15]陈延清.X80高钢级管线钢埋弧焊丝的研究[D].天津:天津大学,2010.
[16]毕宗岳,杨军,牛靖,等.X100高强管线钢焊接接头的断裂韧性[J].金属学报,2013,49(05):576-582.
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