Hard alloy particle dispersion type wear resisting sintered ferro alloy and method of forming the same
US5080713A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 14, 1989 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Apr 14, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F7/0085
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A material for valve seats comprising a wear resisting sintered ferro alloy formed by dispersing particles of a high speed steel in a matrix in which hard alloy particles are dispersed. Steps for forming include mixing particles of a matrix material, carbide material and a hard alloy, and blending the mixture with high speed steel particles, pressurizing and compacting the mixture after blending, then sintering them at 1000.degree. to 1200.degree. C. In the preferred method, at least one element of Fe, C, Ni, Co, Si or Mn is included as the matrix material, and at least one element of Fe, Cr, Mo or V as the carbide material and at least one element of Fe, Cr, Mo, Co, C or W as the hard alloy are prepared. Furthermore, the ferro alloy preferably includes the following amounts of the above mentioned elements, 0.5 to 2.0 wt % of C, 1 to 25 wt % of one or more of Cr, Mo, V, or W and 1 to 15 wt % of one or more of Co, Ni, Mn, or Si.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.