접합 부품 및 접합 강판

• Main Authors: TABATA SHINICHIRO, NAITO YASUAKI, KUSUMI KAZUHISA, IRIKAWA HIDEAKI
• Format: Patent
• Language: Korean
• Published: 08.03.2024
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

이 접합 부품은, 제1 강 부재와, 제2 강 부재와, 상기 제1 강 부재와 상기 제2 강 부재의 맞댐부에 형성되며, 용접 금속 및 열영향부를 포함하는 접합부를 포함하고, 상기 제1 강 부재는, 강판 기재와, 상기 강판 기재의 표면에 형성된 Al-Fe계 피복을 갖고, 인장 강도가 1500㎫ 초과이고, 상기 용접 금속의, 상기 접합부의 연장 방향에 직교하는 판 두께 방향의 단면을 측정면으로 하였을 때, 상기 측정면에 있어서의 상기 용접 금속 중의 평균 Cu 함유량이, 질량％로, 0.03％ 이상, 3.00％ 이하이다. This joint component includes: a first steel member; a second steel member; and a joint portion which is formed at butted portions between the first steel member and the second steel member and includes a weld metal and a heat-affected zone, in which the first steel member includes a steel sheet substrate and an Al-Fe-based coating formed on a surface of the steel sheet substrate, and has a tensile strength of more than 1,500 MPa, and when a cross section of the weld metal in a sheet thickness direction orthogonal to an extension direction of the joint portion is defined as a measuring surface, an average Cu content in the weld metal at the measuring surface is 0.03% or more and 3.00% or less by mass%.