Laser welded joint and laser welding method
US10722976B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Sep 17, 2015 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Jan 14, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A laser welded joint excellent in joint strength preventing a bead from cracking and comprised of exactly the number of weld beads required for joint strength in overlay laser welding of steel sheets forming multiple ring-shaped weld beads, produced by a step of overlaying a plurality of metal sheets and forming a first weld bead and a step of firing a laser beam to successively form a further two or more weld beads at the outside of the first weld bead by laser irradiation, the surface hardness of the weld bead increasing from the inside bead to the outside bead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.