大厚径比、高钢级钢管横向裂纹原因分析

 曹洪平,王国盛,王光敏,崔晓峰,贾晓红

(中石化石油工程机械有限公司 沙市钢管厂,湖北 荆州 434001)
摘要:裂纹是大厚径比、高钢级钢管生产中常见缺陷,但在输油、输气钢管服役中裂纹却是危害较大的缺陷之一。针对X80M Φ610 mm×14.3 mm螺旋缝埋弧焊管焊缝浅层出现的横向裂纹缺陷,结合螺旋缝埋弧焊生产工艺的特点,从横向裂纹产生的内因原料卷板影响、外因卷管成型影响、微观组织及化学成分影响、宏观外界因素影响出发,分析其产生的原因,并提出了几点避免横向裂纹产生的措施。
关键词:螺旋埋弧焊管;横向裂纹;应力
中图分类号:TG40 文献标志码:B doi:10.3969/j.issn.1006-0316.2014.11.019
文章编号:1006-0316 (2014) 11-0077-04
The reasons causing for transverse cracks of large thickness to diameter ratio, high grade steel pipe
CAO Hong-ping,WANG Guo-sheng,WANG Guang-min,CUI Xiao-feng,JIA Xiao-hong
( Shashi Steel Pipe Works, Sinopec Oilfield Equipment Corporation, Jingzhou 434001, China )
Abstract:The crack is a common defect in large diameter-thick ratio, high grade steel pipe production, although it is one of the most harmful defect in service of oil and gas transmission pipe. This article is about the transverse crack in shallow layer of the X80M Φ610 mm×14.3 mm SAWH steel pipe, combined with characteristics of SAWH process, research the effect of coiling plate-the internal cause, molding process-external cause, microstructure and chemical composition, macro external factors, analyze the causes of the crack, and propose some methods of avoiding the transverse crack.
Key words:SAWH pipe;transverse crack;stress
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收稿日期:2014-07-18
作者简介:曹洪平(1965-),男,安徽肥东人,本科,工程师,主要从事螺旋埋弧焊接工艺研究工作。
 

 

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