Patent · US Expired

Method for manufacturing a pressed part from a soft magnetic composite material

US7175794B2 · kind B2 · utility

0Cited by

10References

5Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Hans-Peter Koch · Stuttgart, DE
Jochen Winkler · Eßlingen, DE
Andreas Harzer · Schwieberdingen, DE
Wolfgang Ballerstedt · Gelsenkirchen, DE
Torsten Bober · Renningen, DE

Key dates

Filing date	Feb 11, 2002
Grant date	Feb 13, 2007
Priority date	—
Expiry date	Oct 26, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB22F2999/00
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method for manufacturing a pressed part from a soft magnetic composite material. A starting mixture is provided that includes an iron powder and an auxiliary pressing agent. The starting mixture is pressed to form a pressed part and annealed at temperatures between 380° C. and 450° C. in a mixture of an inert gas and oxygen that has an oxygen concentration between 1% and 10% by volume. A second embodiment of a method for manufacturing a pressed part from a soft magnetic composite material in which a starting mixture is provided that includes an iron powder and an auxiliary pressing agent. The starting mixture is pressed to form a pressed part, annealed, and then postformed and re-annealed.

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