[1]杜 江,牛 辉,张万鹏,等.不同热输入对X80弯管母管焊缝组织性能的影响[J].焊管,2019,42(6):47-51.[doi:10.19291/j.cnki.1001-3938.2019.6.009]
 DU Jiang,NIU Hui,ZHANG Wanpeng,et al.Effect of Different Heat Inputs on Microstructure and Propertiesof Main Pipe Weld of X80 Bend[J].,2019,42(6):47-51.[doi:10.19291/j.cnki.1001-3938.2019.6.009]
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不同热输入对X80弯管母管焊缝组织性能的影响()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
42
期数:
2019年第6期
页码:
47-51
栏目:
工艺与设备
出版日期:
2019-06-28

文章信息/Info

Title:
Effect of Different Heat Inputs on Microstructure and Properties
of Main Pipe Weld of X80 Bend
文章编号:
10.19291/j.cnki.1001-3938.2019.6.009
作者:
杜 江1牛 辉2张万鹏2包志刚2王维东1
1. 西安石油大学 材料科学与工程学院,西安 710065;
2. 宝鸡石油钢管有限责任公司 钢管研究院,陕西 宝鸡 721008
Author(s):
DU Jiang1NIU Hui2ZHANG Wanpeng2BAO Zhigang2WANG Weidong1
1. School of Material Science and Engineering, Xi’an Shiyou University, Xi’an 710065, China;
2. Steel Pipe Research Institute, Baoji Petroleum Steel Pipe Co., Ltd., Baoji 721008, Shaanxi, China
关键词:
焊接X80弯管埋弧焊热输入冲击韧性强度
Keywords:
weldingX80 bendsubmerged arc weldingheat inputimpact toughnessstrength
分类号:
TG142.1
DOI:
10.19291/j.cnki.1001-3938.2019.6.009
文献标志码:
A
摘要:
为了提高X80弯管埋弧焊单丝多道焊焊接质量,以埋弧焊单丝多道焊焊缝为研究对象,采用扫描电镜分析、夏比冲击试验等研究方法,对比研究了两种大小不同的焊接热输入对X80弯管母管焊缝组织和性能的影响。试验结果显示,采用小焊接热输入(17.4 kJ/cm)焊接时,焊缝组织主要以针状铁素体组织为主,冲击断口大部分区域为韧窝+解理,焊缝具有较高的强度和韧性;采用大的焊接热输入(27.3 kJ/cm)焊接时,焊缝组织主要以沿奥氏体晶界分布的先共析铁素体为主,冲击断口大部分区域组织为解理+准解理,焊缝强度和韧性相对于小焊接热输入较差。研究表明,对于壁厚为34.5 mm的X80弯管进行埋弧焊单丝多层多道焊焊接时,建议实际生产时焊接热输入不宜超过20 kJ/cm。
Abstract:
In order to improve the welding quality of single wire multiple pass welding of X80 pipe bend,the single-wire multi-pass weld of X80 pipe bend was taken as the research object,and the effects of two different welding heat inputs on the weld structure and performance of the main pipe of X80 pipe bend were compared and studied by SEM analysis,charpy impact test and other research methods. The test results showed that when welding with the small heat input of 17.4 kJ/cm,the weld microstructure was dominated by acicular ferrite,most of the impact fracture area were dimple and cleavage,and the weld had high strength and toughness;when welding with the large heat input of 27.3 kJ/cm,the weld microstructure was mainly proeutectoid ferrite distributed along the grain boundary of austenite,most of the regional microstructure of impact fracture were cleavage and quasi-cleavage, and the strength and toughness of the weld are relatively poor compared with the small heat input welding. The research indicated that for submerged arc welding single-wire multi-layer multi-pass welding of X80 bend with wall thickness of 34.5 mm,it was recommended that the welding heat input should not exceed 20 kJ/cm in actual production.

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备注/Memo

备注/Memo:

收稿日期:2019-01-19

基金项目:国家重点研发计划“低温X80钢管制造及应用技术研究”(项目编号2017 YF B0304904);陕西省技术创新引导专项基金“X80 OD1219 mm×22 mm螺旋埋弧焊管产业化”(项目编号2018 CG-011)。
作者简介:杜   江(1995—),男,陕西西安人,在读硕士研究生,主要从事管线钢埋弧焊焊接方面的研究。

更新日期/Last Update: 2019-07-02