US 12,749,602 B2 · Iron-chromium-cobalt alloy magnet and method for producing same

Abstract

The purpose of the present invention is to provide: an iron-chromium-cobalt alloy magnet having improved magnetic characteristics, especially maximum energy product; and a method for producing the same. Provided is an iron-chromium-cobalt alloy magnet, wherein: the iron-chromium-cobalt alloy magnet includes titanium; the number density of Ti-enriched phases having a maximum diameter of 3 μm or greater in a cross-section is, on average, less than 1.0 per 10,000 μm2; and the squareness ratio represented by (BH)ma×/(Br×HcB) exceeds 0.72.

Claims7

Dependent claims

An iron-chromium-cobalt alloy magnet, which contains titanium,

wherein a number density of Ti-enriched phases having a maximum diameter of 3 μm or more in a cross section is, on average, less than 1.0 per 10,000 μm2, a squareness ratio represented by (BH)max/(Br×HcB) is more than 0.72, and a content of titanium is 0.10 to 0.60% in terms of mass ratio.

Dependencies are inferred from the claim text.

Facts

Application

18/276,245Filed 10 Feb 2022

Priority

JP 2021-01988110 Feb 2021

Published

US 2024/0304365 A112 Sep 2024

Granted

29 Sep 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification23 codes

H01F 1/055
Containing rare earth metals: and magnetic transition metals, e.g. SmCo5
B22F 9/082
By casting, e.g. through sieves or in water, by atomising or spraying: atomising using a fluid
B22F 10/28
Direct sintering or melting: powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
B22F 10/64
Treatment of workpieces or articles after build-up: by thermal means

Iron-chromium-cobalt alloy magnet and method for producing same

Life of this patent

Iron-chromium-cobalt alloy magnet and method for producing same

Life of this patent

Abstract

Claims7