Studying heat-affected zone deformations of electric arc welding

被引：15

作者：

Suleimanov, R. I. ^{[1
]}

Zainagalina, L. Z. ^{[1
]}

Khabibullin, M. Ya ^{[1
]}

Zaripova, L. M. ^{[1
]}

Kovalev, N. O. ^{[1
]}

机构：

[1] Ufa State Petr Technol Univ, Branch Univ City Oktyabrsky, Devonskaya St 54a, Oktyabrsky 452607, Republic Of Bas, Russia

来源：

INTERNATIONAL CONFERENCE ON MECHANICAL ENGINEERING, AUTOMATION AND CONTROL SYSTEMS 2017 | 2018年 / 327卷

关键词：

D O I：

10.1088/1757-899X/327/3/032053

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The paper studies the influence of the most common defects in permanent electric arc welds made during the welding butt joints in infield oil pipelines, onto the strength characteristics of the welded pipe material around the heat-affected zone. A specimen of a butt weld with an obvious defect was used as a subject of the study. The changes in the geometric parameters of the weld were measured with the standard means; Rockwell hardness in the heat-affected zone was determined in certain areas with justification for the weld process modes. The cause of softening was found to be an increased width of the hot spot on the one side of the weld, where an enlarged crystalline structure appears as a result of the pipe material recrystallization under the influence of heat. Changes in the geometry of the thermal action area are determined by accumulation of molten filler on the one side of the weld when the welding rate is decreased. Some recommendations are given to prevent destruction of the welded structures and appearance of emergencies in infield oil pipelines.

引用

页数：6

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