Toughness Scatter About FCAW-S Girth Weld for X80 Pipeline Steel

被引：0

作者：

Xu, Youxiao ^{[1
]}

Wang, Feng ^{[2
]}

Chen, Lin ^{[1
]}

Wei, Ziyun ^{[1
]}

Song, Weichen ^{[1
]}

机构：

[1] Sinopec Petr Engn Co Ltd, 49 Jinnan Rd, Yingkou 257026, Peoples R China

[2] China Petr Pipeline Res Inst Co Ltd, 44 Jinguang Rd, Langfang 065000, Peoples R China

来源：

ADVANCES IN MATERIALS PROCESSING | 2018年

关键词：

X80; pipeline; Flux-Cored arc welding self; Girth weld; Toughness scatter; MA constituent; HEAT-AFFECTED ZONE; MICROSTRUCTURE; FRACTURE;

D O I：

10.1007/978-981-13-0107-0_101

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The toughness scatter about Flux-Cored Arc Welding Self for X80 pipeline steel was investigated to explore the reason that causes toughness scatter, and how to improve the toughness scatter. The type of the metallography, the volume fraction and the pattern distribution of M/A constituents, and the effects of them to the weld toughness were studied by weld thermal-cycle curves measurement, thermal simulation experiments, Charpy Impact Test, optical microscope observation and SEM. The results showed that the toughness scatter was observed in temperature region of A(c1)-A(c3), MA constituent directly related to the charpy impact toughness, toughness decreased with increasing of the volume fraction of MA constituent. It is considered that bacilliform MA is the main reason that cause toughness scatter, bulk MA is another reason that cause low toughness.

引用

页码：1065 / 1074

页数：10

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