Spot welded joint and spot welding method
US10994364B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2015 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Nov 5, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A spot welded joint in which a high CTS is obtained even if including one or more high strength steel sheets and a method of welding of the same, that is, a spot welded joint 1 including a plurality of steel sheets, wherein one or more steel sheets is a tensile strength 750 to 2500 MPa high strength steel sheet and, at a cross-section in the sheet thickness direction of the steel sheets, when defining superposed surfaces of a high strength steel sheet S1 arranged at an outermost side and another steel sheet 1B as the “plane A” and defining a plane passing through a point of one-half of a distance between a nugget end position E of a high strength steel sheet S1 side on the line L1 in the sheet thickness direction and a crossing point O of the plane A and the line L1 and parallel to the plane A as the “plane B”, at a square area SA of sides of 30 μm centered about a crossing point X of a line L2, which is separated by 250 μm to the heat affected zone side from a tangent at any position on a nugget end line NEL sandwiched between the plane A and plane B and parallel to that tangent, and a line L3 vertical to L2 included in a heat affected zone 4 having a high strength steel sheet S1 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.