Hot working die steel excelling in molten corrosion resistance and strength at elevated temperature and member for high temperature use formed of the hot working die steel
US6841122B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Apr 29, 2002 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Apr 29, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D1/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hot working die steel contains 0.05-0.25% C, 0.30% or less Si, 0.03% or less Mn, 1.0% or less Ni, 5.0-13.0 % Cr, 2.0% or less Mo, 1.0-8.0% W, 1.0-10.0% Co, 0.003-0.020% B, 0.005-0.050% N, and the balance consisting essentially of Fe and unavoidable impurities. If desired, the hot working die steel may further contain 0.01-1.0% V and 0.01-1.0% of at least one kind selected from Nb and Ta.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.