Title:
FRICTION STIR WELDING METHOD FOR ELECTROMAGNETIC STEEL STRIP AND METHOD FOR MANUFACTURING ELECTROMAGNETIC STEEL STRIP
Document Type and Number:
WIPO Patent Application WO/2023/100420
Kind Code:
A1
Abstract:
Provided is a friction stir welding method for an electromagnetic steel strip, which is able to suppress the occurrence of fracturing of a coil joint in a manufacturing line due to a deterioration in the mechanical characteristics or a deterioration in the shape of a coil joint, while maintaining high construction efficiency, and is advantageous in terms of durability of a rotary tool. In this invention, preheating-type dual-surface friction stir welding is carried out, the relationship in expression (7) is satisfied with regard to the diameter D (mm) of a shoulder part of a rotary tool, and the relationship in expression (8) is satisfied with regard to RS×D3/JS, which is represented by the rotation speed RS (rotations/minute) of the rotary tool, the diameter D (mm) of the shoulder part of the rotary tool, and the welding speed JS (mm/minute). Expression (7): 4×TJ
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Inventors:
MATSUSHITA MUNEO (JP)
IWATA SHOHEI (JP)
TOMITA KAI (JP)
IWATA SHOHEI (JP)
TOMITA KAI (JP)
Application Number:
PCT/JP2022/029562
Publication Date:
June 08, 2023
Filing Date:
August 01, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B23K20/12
Domestic Patent References:
| WO2018070317A1 | 2018-04-19 | |||
| WO2011024320A1 | 2011-03-03 | |||
| WO2021060176A1 | 2021-04-01 | |||
| WO1993010935A1 | 1993-06-10 |
Foreign References:
| JP2003170280A | 2003-06-17 | |||
| JP2018095956A | 2018-06-21 | |||
| JPH07505090A | 1995-06-08 | |||
| JP2000334577A | 2000-12-05 |
Other References:
CUI, L.FUJII, H.TSUJI, N.NOGI, K., SCRIPTA MATER, vol. 56, 2007, pages 637 - 640
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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