FRICTION STIR JOINING METHOD FOR ELECTROMAGNETIC STEEL STRIP, METHOD FOR MANUFACTURING ELECTROMAGNETIC STEEL STRIP, FRICTION STIR JOINING DEVICE, AND DEVICE FOR MANUFACTURING ELECTROMAGNETIC STEEL STRIP

Title:

Document Type and Number:

WIPO Patent Application WO/2024/042774

Kind Code:

A1

Abstract:

Provided is a friction stir joining method which is for an electromagnetic steel strip and which, while having a high working efficiency, is capable of preventing a coil joining section in a manufacturing line from breaking due to the deterioration of mechanical characteristics and the deterioration of the shape of the coil section. Post-cooling-type two-surface friction stir joining is performed under a condition satisfying both the relationships of formulas (1) and (2).

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Inventors:

MATSUSHITA MUNEO (JP)
IWATA SHOHEI (JP)
TOMITA KAI (JP)

Application Number:

PCT/JP2023/015082

Publication Date:

February 29, 2024

Filing Date:

April 13, 2023

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B23K20/12; B21B15/00; C22C38/00; C22C38/60

Domestic Patent References:

WO2018070317A1	2018-04-19
WO2021060176A1	2021-04-01

Foreign References:

JP2020124739A	2020-08-20
JP4838385B2	2011-12-14

Attorney, Agent or Firm:

SUGIMURA Kenji (JP)

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