Hypereutectic white iron alloy comprising chromium, boron and nitrogen and cryogenically hardened articles made therefrom
US12084732B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 29, 2022 |
| Grant date | Sep 10, 2024 |
| Priority date | — |
| Expiry date | Mar 29, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C37/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hypereutectic chromium white iron alloy which comprises, in weight percent based on the total weight of the alloy, from 1.5 to 2.85 carbon, from 0.01 to 1.2 nitrogen, from 0.1 to 1.4 boron, from 3 to 34 chromium, from 0.1 to 7.5 Ni, and from 0.1 to 4 Si. The alloy may optionally comprise one or more additional elements, i.e., manganese, cobalt, copper, molybdenum, tungsten, vanadium, niobium, titanium, zirconium, magnesium and/or calcium, one or more rare earth elements, and one or more of tantalum, hafnium, aluminum. The remainder of the alloy is constituted by iron and unavoidable (incidential) impurities. Articles cast from the alloy, especially cryogenically hardened articles, are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.