Method of manufacturing rolled steel products with high elastic limit
US4295902A · kind A · utility
9Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1980 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Feb 26, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D1/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A rolled steel product is given an elastic limit of 500 to 1200 MPa by selection of a particular steel composition and a particular heat treatment. The steel contains 0.10-0.50% C, 0.90-1.50% Mn, and 0.10-0.45% Si, and optionally 0.20-0.70% Ni, 0.10-0.80% Cr, and 0.02-0.10% V. The heat treatment consists of surface quenching from above the austenitization temperature by means of a fluid, the heat remaining in the product being sufficient to temper the martensite and/or bainite in the quenched surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.