Sintered hard alloy of multiple boride containing iron
US3999952A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Feb 28, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C33/0228
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates to a sintered alloy of a boride containing iron consisting essentially of a hard phase composed mainly of iron boride or a multiple boride containing iron in which a part of iron boride is substituted by a non-ferrous boride or multiple boride and a metal phase composed of at least one metal selected from Cu, Co, Ni, Fe, Cr, Mo, W, Ti, Zr, Hf, V, Nb, Ta and alloys composed mainly of these metals, wherein the boron content is 3 to 20% by weight, and to a method of making such sintered alloy. The sintered alloy of this invention has a hardness higher than that of high speed steel and has such high hardness and strength that it is comparable to alloys of cemented carbide, and it is characterized in that it has a good corrosion resistance at room temperature, a high oxidation resistance at high temperatures, a high hardness and a high strength, and that it is cheaper and lighter than cemented carbide. This invention provides a novel sintered high-hardness material which will take the place of cemented carbide or high speed steel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.