Patent · US Expired

Method for treating at least one part of soft magnetic material to form a hard wear area

US5769965A · kind A · utility

39Cited by

0References

20Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Dieter Liedtke
Juergen Graner · Sersheim, DE
Norbert Keim · Besigheim, DE
Joerg Illing · Radeberg, DE

Key dates

Filing date	Apr 19, 1996
Grant date	Jun 23, 1998
Priority date	—
Expiry date	Apr 19, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH01F1/0306
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for treating soft magnetic parts by annealing and producing a wear guard layer, in which the soft magnetic parts are either successively annealed and provided with a wear guard layer in a reaction chamber of a treatment apparatus, or the annealing and production of a wear guard layer are done simultaneously in the reaction chamber. This avoids intermediate transportation and temporary storage as well as contamination of the parts and reduces the costs of the method. The method is especially suitable for treating soft magnetic parts of electromagnetic fuel injection valves.

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