Composite rotor housing with wear-resistant coating
US3948309A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1973 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Aug 20, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49989
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method is disclosed for fabricating a rotor housing for a rotary internal combustion engine. A conductive mandrel is prepared having an outer surface complimentary to the resultant rotor housing inner wall, the mandrel is provided with an exterior surface smoothness in the range of 4-12 r.m.s. A functional coating of a composite particle wear-resistant material is electrolytically deposited onto the mandrel (acting as a cathode) to form an assembly, the exposed surface of the assembly is controlled to have a roughness characterized by projections no less than 0.030 inches and concentrated in a number no less than 5/cm.sup.2. The assembly is placed in a die-casting machine where a molten metallic medium is cast thereabout forming a casting which is substantially mechanically locked to the assembly. The mandrel is then stripped from the coating to leave the resultant rotor housing. The resultant rotor housing is characterized by wear-resistant inner surface which is almost totally non-porous, its as-deposited surface roughness is at least 24 r.m.s., has a high heat transfer coefficient, is non-brittle and experiences no micro-cracking due to heat checking in service. The composite …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.