Method of manufacturing a high toughness cermet for use in cutting tools
US4636252A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | May 14, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12576
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of manufacturing a cermet having high toughness and high hardness, which exhibits excellent impact resistance and wear resistance when used in cutting tools. A mixed powder is prepared which consists essentially of: titanium nitride, from 25 to 50 percent by weight; titanium carbide, from 10 to 30 percent by weight; at least one selected from the group consisting of tantalum carbide, niobium carbide, and zirconium carbide, from 5 to 25 percent by weight; tungsten carbide, from 10 to 25 percent by weight; and at least one selected from the group consisting of Co and Ni, and Al if required, from 7.5 to 25 percent by weight in total. The above mixed powder is compressed into a green compact. The green compact is sintered in a nitrogen atmosphere under a pressure within a range from 0.1 to 100 torr, and at a temperature within a range from 1400.degree. to 1550.degree. C. In the resulting cermet, the hard disperse phase has a cored structure which is formed by an NaCl-type solid solution phase having a centered structure with titanium carbide at the center surrounded by a solid solution of at least one selected from the group consisting of tantalum carbide, niobium carbide, and…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.