[1]姚登樽,尹长华,肖美珍,等.Nb-Cr X80管线钢管焊接接头可靠性分析[J].焊管,2012,35(1):16-20.[doi:1001-3938（2012）01-0016-05]
　YAO Deng-zun,YIN Zhang-hua,XIAO Mei-zhen,et al.Study on the Reliability of Nb-Cr X80 Line Pipe Welded Joint[J].,2012,35(1):16-20.[doi:1001-3938（2012）01-0016-05]
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
35
期数:
2012年第1期
页码:
16-20
栏目:
试验与研究
出版日期:
2012-01-28

文章信息/Info

Title:
Study on the Reliability of Nb-Cr X80 Line Pipe Welded Joint
文章编号:
1001-3938（2012）01-0016-05
作者:
姚登樽1; 尹长华1; 肖美珍2; 姚学全1
（1.中国石油天然气油气管道输送安全国家工程实验室，河北 廊坊 065000；
2. 中国石油管道学院，河北 廊坊 065000）
Author(s):
YAO Deng-zun1;  YIN Zhang-hua1;  XIAO Mei-zhen2;  YAO Xue-quan1
（1. National Engineering Laboratory of Oil and Gas Pipeline Transportation Safety， Langfang 065000，
Hebei， China； 2. China Petroleum Pipeline Institute， Langfang 065000， Hebei， China）
关键词:
Nb-Cr X80管线钢管; 环焊接头; 失效评定; 断裂韧性
Keywords:
Nb-Cr X80 line pipe;  circumferential weld joint;  failure assessment;  fracture toughness
分类号:
TG407
DOI:
1001-3938（2012）01-0016-05
文献标志码:
A
摘要:
在力学性能测试的基础上，应用英国标准协会BS 7910—2005标准对两种不同焊接工艺下的Nb-Cr X80管线钢焊接接头含裂纹型缺陷的失效评定进行了研究。结果表明，同一焊缝二级评定中，由于2B级评定相对于2A级采用了真应力－真应变数据，因而更能反映所评定材料的抗断裂性能。对于相同尺寸的表面裂纹和埋藏裂纹，表面裂纹的危险性要大于埋藏裂纹；对于埋藏裂纹，其在焊接接头中的位置影响评定结果，距离表面越近，其危险性越大。当环焊缝接头存在尺寸为3.2 mm×1 mm的裂纹时，各评定点均在评定曲线可接受范围内，表明焊接接头的结构是安全的。
Abstract:
Based on the mechanical performance testing， the failure assessment to X80 pipeline steel welded joint with crack defect was studied by adopting BS 7910—2005 standard of British Standards Institution under two kinds of different welding process. The results showed that in secondary assessment for the same weld， due to 2B assessment adopted true stress-true strain data， so it reflects the anti-fracture ability of material better than 2A assessment. For the surface crack and hidden crack with the same size， the danger of surface crack is greater than that of hidden crack； the hidden crack， whose location in welded joint can affect assessment result， is closer to the surface， the more dangerous will be. In case of a 3.2 mm×1 mm crack exists in circumferential weld joint， all assessment points are in the range of acceptable assessment curve， it proves the structure of welded joint is safety.

参考文献/References:

Study on the Reliability of Nb-Cr X80 Line Pipe Welded Joint

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备注/Memo

备注/Memo:
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作者简介：姚登樽（1982—），男，工程师，现从事长输管道与储罐工程用材料性能检验与综合分析、管道寿命评估与安全评价，材料失效分析与预防控制等工作。
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