重力式アーク溶接法による水中溶接に関する研究(第一報) -水中溶接部の基本的性質について-

URI http://repository.tsuyama-ct.ac.jp/metadata/529
FulltextURL
Title
重力式アーク溶接法による水中溶接に関する研究(第一報) -水中溶接部の基本的性質について-
Title Alternative
Study on Underwater Welding by Gravity Arc Welding Process (The 1st Report) -Fundamental Properties of Underwater Welded Parts-
Author
著者 山口 常昭
著者(別表記) Yamaguchi Tsuneaki
著者 藤原 敏
著者(別表記) Fujiwara Satoshi
Abstract

Many marine structures intented mainly for the development of submarine oil fields are being fabricated in the wake of the energy crisis and due to the growing marine development. From these backgrounds, there is a strong need for developing reliable techniques for underwater cutting and welding. Then, underwater welding by gravity arc welding process is investigated in city water depth of 20 cm using coating electrode and SM41 steel plate thickness 9mm as base metal. Main results are summarized as follow; 1) Cooling time between 800℃ and 500℃ is about 3 sec. in water and 32 sec. in air, the former being about 10 times bigger than the latter. 2) Tensile strength of underwater welded joint is dominated by the strength of base metal.  3) Diffusible hydrogen content is about 56 cc/100g in water and 30 cc/100g in air, the former being about 2 times higher than the latter. 4) Underwater welded joint has the hazard of weld cracking more than welded part in air.

Subject
560 Metal and mining engineering
Publish Date
1978-10-20
Publication Title
津山工業高等専門学校紀要
Publication Title Alternative
Bulletin of Tsuyama National College of Technology
Volume
16
Start Page
45
End Page
51
ISSN
0287-7066
NCID
AN00149351
Publisher
津山工業高等専門学校
Official URL
Contents Type
Departmental Bulletin Paper
language
Japanese
File Version
publisher