Method of making an extremely fine-grained titanium-based carbonitride alloy
US5137565A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Dec 17, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/056
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
According to the present invention there is now provided a method of making a sintered titanium-based carbonitride alloy. According to the method, melt-metallurgical raw materials containing the metallic alloying elements for hard constituent-forming as well as binder phase-forming elements are melted and cast, using no intentional additions of the elements C, N, B and O, to form a pre-alloy which in solidified condition of brittle intermetallic phases with hard constituent-forming and binder phase-forming elements mixed in atomic scale. The pre-alloy is crushed and/or milled to powder with grain size <50 .mu.m. The powder is carbonitrided for simultaneous formation in situ of extremely fine-grained <0.1 .mu.m, hard constituent particles enclosed in their binder phase. The obtained powder is milled together with lubricant and possible additions of powders of metals, carbides and/or nitrides from the groups IV, V or VI in the Periodic Table in order to obtain desired final analysis after which the powder is compacted and sintered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.