Coating material for the formation of abrasion-resistant and impact-resistant coatings on workpieces
US4507151A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1982 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Jul 23, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12181
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A flame spray powder composition is provided for the thermal coating of workpieces comprising a mechanical mixture of hard particles of material and particles of a matrix-forming self-fluxing alloy selected from the group consisting of Ni-base, Fe-base and Co-base self-fluxing alloys. The hard material is a fused tungsten carbide alloy consisting essentially by weight of about 3 to 7% C, an effective amount of iron ranging up to about 3%, up to about 2% total of other alloying elements and the balance essentially tungsten. Substantially each of the fused tungsten carbide alloy particles is characterized by a metal coating having a melting point higher than the melting point of the self-fluxing alloy and having an average particle size less than about 75 microns. The proportion by weight of the coated hard particles in the mixture ranges from about 10% to 95%, with the balance essentially said self-fluxing alloy. The flame sprayed coating produced from the powder mixture on a workpiece is characterized by a strongly bonded coating having high resistance to abrasion and impact and by uniform properties across the cross section of the coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.