Si-killed steel wire rod and spring
US9725779B2 · kind B2 · utility
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4References
14Claims
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Key dates
| Filing date | Dec 14, 2015 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Feb 10, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/46
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A Si-killed steel wire rod for obtaining a spring excellent in fatigue properties and a spring excellent in fatigue properties obtained from such steel wire rod are provided. In the Si-killed steel wire rod of the present invention, oxide-based inclusions present in the wire rod contain SiO2: 30-90%, Al2O3: 2-35%, MgO: 35% or below (not inclusive of 0%), CaO: 50% or below (not inclusive of 0%), MnO: 20% or below (not inclusive of 0%) and BaO: 0.2-20% respectively, and total content of (CaO+MgO) is 3% or above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.