Method of producing a camshaft
US4652724A · kind A · utility
7Cited by
0References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1985 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | May 6, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2101
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of producing a cast iron camshaft including the steps of applying a high-density energy source, such as a TIG arc, a laser beam, and an electron beam over the entire sliding surface of a cam to melt the surface portion and cooling the cam by dissipating the localized heat through the camshaft itself so as to form a double structure hardened layer consisting of a chilled layer having a large amount of cementite and a hardened layer of martensite. This method omits the preheating of the camshaft prior to the high-density energy irradiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.