Joint product between steel product and aluminum material, spot welding method for the joint product, and electrode chip for use in the joint product
US8487206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2011 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Jul 27, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12347
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Provided is a joint product of a steel product and an aluminum material, the joint product being formed by joining the steel product having a sheet thickness t1 of 0.3 to 3.0 mm with the aluminum material having a sheet thickness t2 of 0.5 to 4.0 mm by spot welding, wherein a nugget area in a joint part is from 20×t20.5 to 100×t20.5 mm2, an area of a portion where a thickness of an interface reaction layer is from 0.5 to 3 μm is 10×t20.5 mm2 or more, and a difference between the thickness of the interface reaction layer at a joint part center and the thickness of the interface reaction layer at a point distant from the joint part center by a distance of one-fourth of a joint diameter is 5 μm or less, and wherein the aluminum material is pure aluminum or an aluminum alloy material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.