Power transmission shaft and constant velocity joint
US6390924B1 · kind B1 · utility
19Cited by
14References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1999 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Dec 21, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S464/902
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A power transmission shaft using the constant velocity joint is manufactured by applying induction hardening to graphite steel thereby to harden the surface layer and form a 2-phase structure of ferrite and martensite in the core thereof. The graphite steel contains 0.35 to 0.70% of C, 0.4 to 2.0% of Si, 0.3 to 1.5% of Mn, 0.025% or less S, 0.02% or less P, 0.01 to 0.1% of Al, 0.001 to 0.004% of B and 0.002 to 0.008% of N by weight as the basic components, with the rest comprising Fe and inevitable impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.