METHOD FOR FRICTION-STIR-WELDING ELECTROMAGNETIC STEEL STRIP, METHOD FOR MANUFACTURING ELECTROMAGNETIC STEEL STRIP, FRICTION STIR WELDING DEVICE, AND DEVICE FOR MANUFACTURING ELECTROMAGNETIC STEEL STRIP

WIPO Patent Application WO/2023/100419

A1

Provided is a method for friction-stir-welding an electromagnetic steel strip, the method making it possible to suppress the occurrence of fracturing of a coil weld part, in a manufacturing line, caused by degradation in shape or degradation of the mechanical characteristics of the coil weld part, while maintaining high processing efficiency. Preheating-type double-sided friction stir welding is carried out, and then welding is carried out under conditions such that the steel compositions of a heat-processing-affected part and a welded part formed through welding are each composed mainly of a ferrite phase and such that the relationships in formulas (1) to (4) are simultaneously satisfied.　Formula (1): Dsz≤200 μm; Formula (2): Dhaz1≤Dbm1; Formula (3): Dhaz2≤Dbm2; Formula (4): 0.9×(Hbm1+Hbm2)/2≤Hsz≤1.2×(Hbm1+Hbm2)/2

JP2501702	FRICTION PRESS WELDING MACHINE
JP2015205339	FRICTION STIR WELDING METHOD AND FRICTION STIR WELDED BODY MANUFACTURED BY USING THE SAME
WO/2018/143335	LINEAR FRICTION WELDING METHOD

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

PCT/JP2022/029560

June 08, 2023

August 01, 2022

Click for automatic bibliography generation  

JFE STEEL CORP (JP)

B23K20/12

WO2018070317A1	2018-04-19
WO2011024320A1	2011-03-03
WO2021060176A1	2021-04-01
WO1993010935A1	1993-06-10

JP2003170280A	2003-06-17
JP2018095956A	2018-06-21
JPH07505090A	1995-06-08
JP3261433B2	2002-03-04

CUI, L.FUJII, H.TSUJI, N.NOGI, K, SCRIPTA MATER, vol. 56, 2007, pages 637 - 640

SUGIMURA Kenji (JP)

View/Download PDF      PDF Help

Previous Patent: MEASURING DEVICE

Next Patent: FRICTION STIR WELDING METHOD FOR ELECTROMAGNETIC STEEL STRIP AND METHOD FOR MANUFACTURING ELECTROMAG...