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Application filed by Nisshin Steel Co LtdfiledCriticalNisshin Steel Co Ltd
Priority to MYPI2015700110ApriorityCriticalpatent/MY171286A/en
Priority claimed from PCT/JP2012/068951external-prioritypatent/WO2014016935A1/en
Publication of MY171286ApublicationCriticalpatent/MY171286A/en
Provided is shaped steel, in which a T-shaped joint, formed by pressing of an edge section of a web material comprising a steel plate perpendicularly against a flange material comprising a steel plate, is fusion-joined on the basis of one-pass irradiation of laser beam from one side. A welded portion shape of a cross-section perpendicular to the shaped steel longitudinal direction is set to satisfy a>0 mm, b>0 mm, c?0.14Tw, d?0 mm, e?0 mm, a+d?2 mm and b+e?2 mm; where a is a front melting width of the web material (on the laser beam irradiation side), b is a rear melting width of the web material (on the laser beam non-irradiation side), c is a maximum weld penetration depth, in a plate pressure direction, into the flange material, d is a front melting width of the flange material (on the laser beam irradiation side), e is a rear melting width of the flange material (on the laser beam non-irradiation side), and Tw is the plate thickness of the web material. When both the flange material and the web material comprise a galvanized steel plate, there hold preferably a>0 mm, b>0 mm, c?0.14Tw, d?0 mm, e?0 mm, a+d?2 mm and b+e?2 mm.
METHOD OF AN END-SOLUTION WITHOUT WITHOUT SUBSTITUTAL BLADE WELDING ADDITION MATERIALS USING AT LEAST ONE PRESSURE ELEMENT BEING SUITABLE FOR THE APPLICATION OF DOSI OR MORE DIFFERENT LEVELS