[1]张锦刚,杨国才,刘刚伟,等.管端内衬不锈钢焊管环焊缝缺陷分析[J].焊管,2017,40(8):45-48.[doi:10.19291/j.cnki.1001-3938.2017.08.009]
 ZHANG Jingang,YANG Guocai,LIU Gangwei,et al.Analysis on Circumferential Weld Defect of Pipe End Lined with Stainless Steel[J].,2017,40(8):45-48.[doi:10.19291/j.cnki.1001-3938.2017.08.009]
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管端内衬不锈钢焊管环焊缝缺陷分析()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
40
期数:
2017年第8期
页码:
45-48
栏目:
工艺与设备
出版日期:
2017-08-28

文章信息/Info

Title:
Analysis on Circumferential Weld Defect of Pipe End Lined with Stainless Steel
文章编号:
10.19291/j.cnki.1001-3938.2017.08.009
作者:
张锦刚12杨国才3刘刚伟12张万鹏12牛 辉12祁福川3李志德3张银亮1
1. 宝鸡石油钢管有限责任公司,陕西 宝鸡 721008;
2. 国家石油天然气管材工程技术研究中心,陕西 宝鸡 721008;
3. 甘肃水投天水供水有限责任公司,甘肃 天水 741000
Author(s):
ZHANG Jingang12 YANG Guocai3 LIU Gangwei12 ZHANG Wanpeng12 NIU Hui12QI Fuchuan3 LI Zhide3 ZHANG Yinliang1
1. Baoji Petroleum Steel Pipe Co., Ltd., Baoji 721008, Shaanxi, China;
2. Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods, Baoji 721008, Shaanxi, China;
3. Gansu Water Investment Tianshui Water Supply Co., Ltd., Tianshui 741000, Gansu, China
关键词:
焊管内衬不锈钢环焊缝热裂纹焊接应力
Keywords:
welded pipe stainless steel lined circumferential weld hot crack welding stress
分类号:
TG441.3
DOI:
10.19291/j.cnki.1001-3938.2017.08.009
文献标志码:
A
摘要:
为了对国内某供水工程用管端内衬不锈钢钢管环焊缝缺陷进行评定,利用光学显微镜、扫描电镜以及能谱分析等手段对缺陷形貌、元素含量和组织形态进行了分析。结果表明,该环焊缝缺陷为典型焊接热裂纹,裂纹起始位置在碳钢层底部,裂纹处以淬硬的马氏体组织为主,并伴有氧化物夹杂物。分析认为,该裂纹缺陷是由于打底焊之后焊道保护不良、清理不到位和焊接热输入过大造成,可以通过严格控制有害杂质、降低热输入、减小接头拘束度等方法来防止此类缺陷的发生。
Abstract:
In order to analyze the circumferential weld defect of pipe end lined with stainless steel used for some domestic water supply engineering, by means of optical microscope, scanning electron microscope and energy spectrum analysis method, the defect morphology, element content and organization form were analyzed. The results indicated that this circumferential weld defect was typical welding hot crack, the crack initiation site was at the bottom of the carbon steel layer, the microstructure of crack was mainly composed of martensite,accompanied by oxide inclusions. Through the analysis results, it considered that the crack defect was due to the weld bead was not well protected after backing weld, insufficient cleaning and too big welding heat input, can strictly control harmful impurities, reduce the heat input, reduce the joint constraint degree and so on to prevent the occurrence of such defects.

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备注/Memo

备注/Memo:
 收稿日期:2017-03-20
作者简介:张锦刚(1978—),男,工程师,主要从事管材及焊接技术研究工作。
更新日期/Last Update: 2017-12-11