Patent · US Expired

Method of achieving a flat magnetization loop in amorphous cores by heat treatment

US4812181A · kind A · utility

8Cited by

2References

3Claims

0Family size

Assignee

Vacuumschmelze GmbH & Co. KG · DE

Inventors

Hans-Rainer Hilzinger · Langenselbold, DE
Giselher Herzer · Bruchköbel, DE

Key dates

Filing date	Mar 16, 1987
Grant date	Mar 14, 1989
Priority date	—
Expiry date	Mar 16, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC21D6/008
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method for achieving a flat magnetization loop in cores, such as for use in inductive components, which are wound of amorphous ribbon includes the steps of subjecting the wound core to long-term heat treatment of more than 10 hours, and selecting the temperature during the heat treatment so low that less than half of the ribbon cross-section exhibits crystalline precipitations which occur during the heat treatment.

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