[1]程巨强,弥国华,刘志学,等.S32760超级双相不锈钢管材焊接接头组织及腐蚀原因分析[J].焊管,2014,37(5):20-23.[doi:1001-3938(2014)05-0020-04]
 CHENG Juqiang,MI Guohua,LIU Zhixue,et al.Analysis on Microstructure and Corrosion Reason of S32760 Super Duplex Stainless Steels Pipe Welded Joints[J].,2014,37(5):20-23.[doi:1001-3938(2014)05-0020-04]
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S32760超级双相不锈钢管材
焊接接头组织及腐蚀原因分析
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
37
期数:
2014年第5期
页码:
20-23
栏目:
试验与研究
出版日期:
2014-05-28

文章信息/Info

Title:
Analysis on Microstructure and Corrosion Reason of S32760 Super Duplex
Stainless Steels Pipe Welded Joints
文章编号:
1001-3938(2014)05-0020-04
作者:
程巨强1弥国华1刘志学1马海峰2郭 旺2
(1. 西安工业大学 材料与化工学院,西安 710032;
2. 珠海巨涛石油服务有限公司,广东 珠海 518068)
Author(s):
CHENG Juqiang1MI Guohua1LIU Zhixue1MA Haifeng2GUO Wang2
(1. College of Materials Science and Chemical Engineering,Xi’an Technological University,Xi’an 710032,China;
2. Zhuhai Jutao Offshore Oil Service Ltd.,Zhuhai 518068,Guangdong,China)
关键词:
S32760超级双相不锈钢氩弧焊焊接接头腐蚀
Keywords:
S32760 super duplex stainless steelgas tungsten arc weldingwelded jointscorrosion
分类号:
TG457
DOI:
1001-3938(2014)05-0020-04
文献标志码:
A
摘要:
观察了氩弧焊S32760双相不锈钢管材焊接接头各区的组织,分析了焊接接头腐蚀的原因,测定了焊接接头奥氏体和铁素体相比例。结果表明,氩弧焊焊后不进行热处理,焊缝和热影响区组织均为奥氏体和铁素体双相组织,存在少量的σ相,焊缝金属的奥氏体组织比例为64%,铁素体比例为36%,母材部分奥氏体比例为52%,铁素体比例在48%。双相不锈钢焊接接头熔合线结合良好,焊缝热影响区宽度较小。焊接接头出现孔蚀的原因与焊后冷却速度过慢、焊缝组织中奥氏体量过多及其组织中析出σ相有关。
Abstract:
Welded joints microstructure of S32760 super duplex stainless steels pipe was observed and the corrosion cause of welded joint was analyzed, the ferrite and austenite phase ratio was determined. The results showed that without heat treatment after GTAW welding, the microstructure of weld and HAZ both are ferrite and austenite duplex phase microstructure, and a small amount of sigma phase exist. The austenite phase content of weld metal is 64%, ferrite phase is 36%, the austenite phase content of parent metal is 52%, and ferrite phase is 48%. The fusion line combination of duplex stainless steel welded joint is good, and the width of weld heat affected zone is smaller. The reasons for pitting corrosion in welded joints is relevant to too slow cooling rate, austenite content is too much and precipitation sigma phase after welding.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2014-01-07
作者简介:程巨强(1963—),男,陕西岐山人,博士,教授,主要从事高强度钢铁材料及非铁合金的研究、开发与应用工作。
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