IP Library › Granted Patent US 12,522,898
Granted Patent B2
US 12,522,898 · App. 17/909,438 · Granted Jan 13, 2026

Method for manufacturing Fe—Co-based alloy bar, and Fe—Co-based alloy bar

Inventors: Masaru Fujiyoshi (Tokyo, JP); Shujiroh Uesaka (Tokyo, JP); Kouji Kobayashi (Tokyo, JP)
Assignee: Proterial, Ltd.
C22C30/00C21D8/1222C21D8/125C22C19/07C22C38/00C22C38/10C21D2201/05C22C2202/02
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Quick Facts
Patent No.
US 12,522,898
App. No.
17/909,438
Granted
Jan 13, 2026
Kind
B2
Abstract

An Fe—Co-based alloy bar and a method for manufacturing same, whereby excellent magnetic properties can be reliably obtained. The method for manufacturing an Fe—Co-based alloy bar comprises a heating straightening step for applying tensile stress to a hot-rolled material of an Fe—Co-based alloy while heating the hot-rolled material to a temperature of 500-900° C. Preferably, ohmic heating is used in the heating straightening step. In addition, the Fe—Co-based alloy bar has 20% or more by area ratio of crystal grains having a grain orientation spread (GOS) value of at least 0.5°.

Claims (17)

1 . A method for manufacturing an Fe—Co-based alloy bar, comprising

a heating straightening step in which tensile stress is imparted by pulling to a hot-rolled material of an Fe—Co-based alloy while heating the hot-rolled material to a temperature of 500 to 900° C.,

wherein the Fe—Co-based alloy contains 95% or more of Fe+Co in mass %.

2 . The method for manufacturing an Fe—Co-based alloy bar according to claim 1 ,

wherein in the heating straightening step, tensile stress is imparted by pulling to the hot-rolled material of the Fe—Co-based alloy while heating the hot-rolled material to the temperature of 500 to 850° C.

3 . The method for manufacturing an Fe—Co-based alloy bar according to claim 1 ,

wherein ohmic heating is used as a heating means in the heating straightening step.

4 . The method for manufacturing an Fe—Co-based alloy bar according to claim 1 ,

wherein a solution treatment is performed before the heating straightening step.

5 . The method for manufacturing an Fe—Co-based alloy bar according to claim 2 ,

wherein ohmic heating is used as a heating means in the heating straightening step.

6 . The method for manufacturing an Fe—Co-based alloy bar according to claim 2 ,

wherein a solution treatment is performed before the heating straightening step.

7 . The method for manufacturing an Fe—Co-based alloy bar according to claim 3 ,

wherein a solution treatment is performed before the heating straightening step.

8 . The method for manufacturing an Fe—Co-based alloy bar according to claim 5 ,

wherein a solution treatment is performed before the heating straightening step.

Assignments (2)
CHANGE OF NAME Recorded May 3, 2023
From: HITACHI METALS, LTD.
To: PROTERIAL, LTD.
Reel/Frame 063526/0046 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 6, 2022
From: FUJIYOSHI, MASARU; UESAKA, SHUJIROH; KOBAYASHI, KOUJI
To: HITACHI METALS, LTD.
Reel/Frame 061001/0807 →
Priority Claims (1)
JP 2020-040832 · Mar 10, 2020 · national
Continuity (1)
Related Publication 20230349028A1 · Nov 2, 2023
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