ULTRA-HIGH STRENGTH GAS-METAL ARC WELDED JOINT HAVING EXCELLENT IMPACT TOUGHNESS

• Main Authors: JEONG, HONG CHUL, LEE, DONG RYEOL
• Format: Patent
• Language: English; Korean
• Published: 02.07.2015
• Subjects: ALLOYS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FERROUS OR NON-FERROUS ALLOYS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

The present invention relates to a gas metal arc welded joint, which can be obtained by gas metal arc welding (GMAW) of high-strength steel used in a marine structure, construction, a bridge, and the like. To achieve this, provided is a gas metal arc welded joint having excellent strength and impact toughness by controlling composition and a microstructure of a welded joint. 본 발명은 해양구조물, 건축, 교량 등에 사용되는 극후물 강재에 대하여 가스메탈 아크 용접(GMAW) 함으로써 얻을 수 있는 가스메탈 아크 용접이음부(Gas-Metal Arc Welded Joint)에 관한 것이다. 이를 위해, 용접이음부의 성분조성 및 미세조직을 제어함으로써 강도 및 충격인성이 우수한 가스메탈 아크 용접이음부를 제공할 수 있다.