TWI733497B

• Main Authors: HONMA, RYUICHI, URAKAWA, TOMOKI, TANAKA, SHUN
• Format: Patent
• Language: Chinese
• Published: 11.07.2021
• Subjects: ALLOYS; BUILDING; CEILINGS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FERROUS OR NON-FERROUS ALLOYS; FIXED CONSTRUCTIONS; FLOORS; GENERAL BUILDING CONSTRUCTIONS; INSULATION OR OTHER PROTECTION OF BUILDINGS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; ROOFS; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WALLS, e.g. PARTITIONS; WELDING; WORKING BY LASER BEAM

The present invention provides a box column, in which a partition plate is fixed through a welding part inside a box section column (column stem) formed by a panel. The panel is made of a first steel plate and the partition plate is made of a second steel plate. In the box column, the first steel plate has a predetermined chemical composition, in which the ratio of Mn and Ni content Mn/Ni is 0.80 or less, and the carbon equivalent CEWES is 0.430% or more and 0.900% or less; the first steel plate has a tensile strength of 780 MPa or more and 930 MPa or less and a yield strength of 630 MPa or more and 750 MPa or less, and the yield ratio is 85% or less; the thickness of the first steel plate is 40 mm or more and 120 mm or less; and the welding part is an electroslag welding part, and the average Charpy absorption energy at 0 DEG C in the HAZ of the welding part is 27J or more.