[1]刘庆忠,张敬洲,朱文学,等.L415M管线钢焊缝横向裂纹产生原因与预防措施[J].焊管,2020,43(11):65-68.[doi:10.19291/j.cnki.1001-3938.2020.11.011]
 LIU Qingzhong,ZHANG Jingzhou,ZHU Wenxue,et al.Causes and Solutions of Transverse Cracks in L415M Pipeline Steel Welds[J].,2020,43(11):65-68.[doi:10.19291/j.cnki.1001-3938.2020.11.011]
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L415M管线钢焊缝横向裂纹
产生原因与预防措施
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
43
期数:
2020年第11期
页码:
65-68
栏目:
经验交流
出版日期:
2020-11-28

文章信息/Info

Title:
Causes and Solutions of Transverse Cracks in L415M Pipeline Steel Welds
文章编号:
10.19291/j.cnki.1001-3938.2020.11.011
作者:
刘庆忠张敬洲朱文学叶 勇
大庆油田工程建设有限公司,黑龙江 大庆 163712
Author(s):
LIU Qingzhong ZHANG Jingzhou ZHU Wenxue YE Yong
Daqing Oilfield Engineering Construction Co., Ltd., Daqing 163712, Heilongjiang, China
关键词:
L415M管线钢热裂纹焊丝受潮工艺措施
Keywords:
L415M pipeline steelhot crackwire dampprocess measures
分类号:
TG444.2
DOI:
10.19291/j.cnki.1001-3938.2020.11.011
文献标志码:
B
摘要:
为解决管道施工中L415M管线钢横向裂纹的难题,针对裂纹产生部位、方向和现场施焊情况,从焊接材料、冶金、工艺等方面进行了分析,判定了裂纹性质。分析表明,焊缝热裂纹产生是焊丝受潮与焊接工艺措施不当共同导致的,其中焊丝受潮是主因。根据裂纹产生原因,通过采取避免焊丝受潮、调整打底焊顺序、降低自保护焊热输入、调整焊工起弧位置以及拉大起弧间距等措施,避免了裂纹再次产生,保证了焊接接头的焊接质量和管道安全。
Abstract:
In order to solve the problem of transverse crack of L415M pipeline steel in pipeline construction, the crack location, direction and field welding situation are analyzed from welding materials, metallurgy and technology. And the crack properties are determined. The main reason is that weld hot crack is affected by damp together with welding process. According to the causes of the cracks, measures such as avoiding the welding wire from getting damp, adjusting the backing sequence, reducing the heat input of the self-shielded welding, adjusting the position of the welder’s arcing and enlarging the arcing distance are adopted. The cracks are avoided again and the quality of welding joint and the safety of pipeline are ensured.

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备注/Memo

备注/Memo:
收稿日期:2020-04-25
作者简介:刘庆忠(1972—),男,黑龙江省大庆市人,高级工程师,主要从事油田地面焊接技术研究工作。
更新日期/Last Update: 2021-01-14