TiO2 성분 플럭스충진와이어에 따른 S500강의 GMA 용접부 특성
Characteristics of GMA Weld Zone on TiO2 Different Component Flux Cored Wire for S500 Grade Steel
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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 TiO2 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 –40oC, tensile strength at room temperature and CTOD at −20oC. As a result, the developed flux cored wire was suitable for S500 steel.
Abstract
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 TiO2 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 –40oC, tensile strength at room temperature and CTOD at −20oC. As a result, the developed flux cored wire was suitable for S500 steel.
참고문헌 (10)
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