[1]李 龙,章传国,孙磊磊,等.蒸汽输送用X80钢级UOE焊管的高温蠕变行为研究及断口分析[J].焊管,2021,44(7):1-8.[doi:10.19291/j.cnki.1001-3938.2021.07.001]
　LI Long,ZHANG Chuanguo,SUN Leilei,et al.High Temperature Creep Behavior and Fracture Analysis of X80 UOE Welded Pipe for Steam Distribution[J].,2021,44(7):1-8.[doi:10.19291/j.cnki.1001-3938.2021.07.001]
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蒸汽输送用X80钢级UOE焊管的高温蠕变行为研究及断口分析()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
第44卷
期数:
2021年第7期
页码:
1-8
栏目:
试验与研究
出版日期:
2021-07-28

文章信息/Info

Title:
High Temperature Creep Behavior and Fracture Analysis of X80 UOE Welded Pipe for Steam Distribution
文章编号:
10.19291/j.cnki.1001-3938.2021.07.001
作者:
李 龙; 章传国; 孙磊磊; 郑 磊; 胡 平
宝钢中央研究院 钢管技术中心
Author(s):
LI Long;  ZHANG Chuanguo;  SUN Leilei;  ZHENG Lei;  HU Ping
Tube and Pipe Department, Baosteel Research Institute, Baoshan Iron and Steel Co., Ltd., Shanghai 201900, China
关键词:
UOE焊管; 高温性能; 蠕变; 断口形貌
Keywords:
UOE welded pipe;  high temperature performance;  creep;  fracture morphology
分类号:
TG111.8
DOI:
10.19291/j.cnki.1001-3938.2021.07.001
文献标志码:
A
摘要:
为了确保X80钢级蒸汽输送用UOE焊管服役安全性，在450 ℃下对其管体和焊缝进行不同应力条件的蠕变试验。结果表明，管体预期蠕变持久寿命长于焊缝，但均满足使用要求；管体和焊缝蠕变断口存在显著差异，管体试样出现明显颈缩现象，断口呈韧窝状，焊缝试样无明显颈缩，断口为沿晶型和韧窝型的混合断口；焊缝试样HAZ粗晶区晶粒粗大，且晶界上存在较多夹杂，在蠕变试验过程中，空洞易在晶界处萌生并长大，形成裂纹源并发生沿晶断裂，从而降低其蠕变性能；焊缝蠕变在较低应力条件下，断口出现部分解理形貌，抗蠕变性能进一步恶化。
Abstract:
In order to ensure the service safety of X80 UOE welded pipe for steam transportation, creep tests were carried out on the pipe body and weld under different stress conditions at 450 ℃. The results show that the expected creep rupture life of the pipe is longer than that of the weld, but both meet the service requirements. The results show that there is a significant difference in the creep fracture between the pipe and the weld. The pipe body sample has obvious necking phenomenon, and the creep fracture is dimple type. The weld sample has no obvious necking, and the creep fracture is a mixed fracture of intergranular and dimple type. The grain size in HAZ coarse grain zone of the weld samples is coarse and there are many inclusions on the grain boundary. During the creep test, voids are easy to form and grow at the grain boundary, forming crack sources and intergranular fracture, thus reducing its creep properties. Under the condition of low stress, the creep fracture of the weld appears partial cleavage morphology, and the creep resistance is further deteriorated.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2021－01－08
作者简介：李 龙（1994—），男，硕士，工程师，主要研究方向为油气输送管道用高性能管线钢、管线管产品的开发。
更新日期/Last Update: 2021-07-23