Spring steel superior in workability
US6372056B1 · kind B1 · utility
19Cited by
10References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D9/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A spring steel which is superior in both shaving properties and green drawing properties, which are important in spring production. A process for making the spring steel into wire rods for good springs. A rolled spring steel superior in workability characterized in that it has the following mechanical properties.Tensile strength≦1200 MPa30%≦reduction of area≦70%A process for producing a steel wire rod for springs from said spring steel, said process comprising drawing, shaving, and oil tempering, which are carried out sequentially, said drawing being optionally followed by prescribed treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.