Surface protection method and article formed thereby
US4938991A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Dec 6, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C30/005
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The disclosed invention describes a method for cladding surfaces of an earth boring apparatus, or the like, with a hardfacing material having an entrained, or encapsulated, heavy metal refractory carbide. The method includes heating the surface to the incipient melting temperature and applying a molten super-alloy matrix material that has a melting temperature below the melting temperature of the carbide. The super-alloy, in a powder form, is pre-mixed with the carbide material, also in a powder form, such that, when the molten surface and the molten super-alloy cool, they form a metallurgical bond, at the surface, with the carbide material mechanically retained within the solidified matrix material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.