Patent · US Expired

Quench hardening of gears

US4154628A · kind A · utility

7Cited by

4References

4Claims

0Family size

Assignee

Mannesmann AG · DE

Inventors

Otto Dudek · Oelde, DE
Klaus Ortmann · Witten, DE
Lothar Reichmann · Witten, DE
Wilhelm Schafer · Witten, DE

Key dates

Filing date	Nov 14, 1977
Grant date	May 15, 1979
Priority date	—
Expiry date	Nov 14, 1997

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/4948
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method of quench hardening a gear having a gear rim, a hub, and two rim carrying gear disk includes carburizing the gear and quenching it subsequently in a saline bath, and is improved by releasably covering the perforated disks with perforated supplemental disks, the perforations are closed during carburization but open during quenching. The gear is turned about its vertically positioned axis during quenching; the supplemental disks are removed subsequently so that the gear disks are not carburized.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.