Method for producing a steel sheet having remarkably excellent toughness at low temperatures
US4138278A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1977 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Aug 22, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S72/70
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing a steel sheet having excellent low-temperature toughness, comprising a step of heating to a temperature not higher than 1150.degree. C., a steel slab containing 0.01 - 0.13% C, 0.05 - 0.8% Si, 0.8 - 1.8% Mn, 0.01 - 0.08% total Al, 0.08 - 0.40% Mo and not more than 0.015% S with the balance being iron and unavoidable impurities, and a step of hot rolling the steel slab thus obtained by at least three passes with a minimum reduction percentage not less than 2% by each rolling pass in a temperature range of 900 - 1050.degree. C, a total reduction percentage not less than 50%, and with a finishing temperature not higher than 820.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.