Process for the manufacture of steel products
US4089681A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1977 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Feb 3, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a process for manufacturing products such as bars, sections, strips, weldless tubes made of ordinary or alloyed steel, starting from an iron ore, without passing through the liquid state. This process consists in: PA1 A pre-reduced concentrated iron ore with a non-reducible oxide content of less than 1% is prepared, PA1 A homogeneous mixture of this ore is made with a lubricant, a binder and a carbonized reducer, PA1 A slab of this mixture is compacted and a complete reduction is carried out on this compacted slab under a neutral or reducer gas flow of between 1100.degree. and 1350.degree. C in order to obtain a porous steel slab, PA1 The hot slab leaving the furnace is transformed by extrusion, rolling or forging. The invention enables products of accurate analysis to be obtained with simplified installations of average capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.