Creep-resistant maraging heat-treatment steel
US7686898B2 · kind B2 · utility
2Cited by
12References
8Claims
0Family size
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Key dates
| Filing date | Apr 27, 2007 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Mar 14, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/46
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A maraging heat-treatment steel includes 8.5 to 9.5% by weight of Cr, 0.15 to 0.25% by weight of Mn, 2 to 2.7% by weight of Ni, 0.5 to 2.5% by weight of Mo, 0.4 to 0.8% by weight of V, 0.001 to 0.15% by weight of Si, 0.06 to 0.1% by weight of C, 0.11 to 0.15% by weight of N, 0.02 to 0.04% by weight of Nb, maximum 0.007% by weight of P, maximum 0.005% by weight of S, maximum 0.01% by weight of Al, iron and standard impurities, wherein a weight ratio of vanadium to nitrogen V/N is in a range between 4.3 and 5.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.