Cast steel and steel material with excellent workability, method for processing molten steel therefor and method for manufacturing the cast steel and steel material
US6918969B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Aug 16, 2002 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Nov 16, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cast steel with excellent workability, characterized in that not less than 60% of the total cross section thereof is occupied by equiaxed crystals, the diameters (mm) of which satisfy the following formula:D<1.2X1/3+0.75,wherein D designates each diameter (mm) of equiaxed crystals in terms of internal structure in which the crystal orientations are identical, and X the distance (mm) from the surface of the cast steel.The cast steel and the steel material obtained by processing the cast steel have very few surface flaws and internal defects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.