Friction stir spot welding method and friction stir spot welding device

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United States of America Patent

PATENT NO 11135674
APP PUB NO 20190314927A1
SERIAL NO

16313785

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Abstract

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A method of performing friction stir spot welding of a plurality of steel plates, includes the steps of: friction stirring a spot welding portion of the plurality of steel plates by pressing a tool against the spot welding portion while rotating the tool, to plasticize the spot welding portion by friction heat; cooling the spot welding portion to cause martensitic transformation to occur in the spot welding portion, after the step of friction stirring the spot welding portion; and tempering the spot welding portion by the friction heat by re-pressing the tool against the spot welding portion while rotating the tool, after the step of cooling the spot welding portion.

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Patent Owner(s)

Patent OwnerAddress
KAWASAKI JUKOGYO KABUSHIKI KAISHAKOBE-SHI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukuda, Takuya Kakogawa, JP 83 1052
Miyake, Masahiro Kobe, JP 41 340
Muramatsu, Yoshitaka Akashi, JP 17 30
Ohashi, Ryoji Kobe, JP 24 102

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