TiO 2 성분 플럭스충진와이어에 따른 S500강의 GMA 용접부 특성

Recently, the production of oil and gas at the arctic ocean and offshore has been growing. Accordingly, S500 steel with the high tensile strength and excellent toughness has been used and flux cored wire that can be welded to the S500 has been required. In this study, we carried out observation of m...

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Bibliographic Details
Published in한국표면공학회지 Vol. 48; no. 6; pp. 335 - 342
Main Authors 유철, 고영봉, 박경채, Yoo, Cheol, Ko, Young-Bong, Park, Kyeung-Chae
Format Journal Article
LanguageKorean
Published 2015
Subjects
S500
Acicular ferrite
CTOD
Impact toughness
Flux cored wire
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Summary:Recently, the production of oil and gas at the arctic ocean and offshore has been growing. Accordingly, S500 steel with the high tensile strength and excellent toughness has been used and flux cored wire that can be welded to the S500 has been required. In this study, we carried out observation of microstructures, mechanical properties and CTOD (crack tip openning displacement) in the weld zone that GMA (gas metal arc) welded with different component of $TiO_2$ flux core wire (the main components, rutile or Ti-slag) for S500 steel. Weld zone produced with Ti-slag flux cored wire has formed a enough acicular ferrite and shown excellent impact toughness at $-40^{\circ}C$, tensile strength at room temperature and CTOD at $-20^{\circ}C$. As a result, the developed flux cored wire was suitable for S500 steel.
Bibliography:KISTI1.1003/JNL.JAKO201504255079546
ISSN:1225-8024