Invention Grant
- Patent Title: Friction stir spot welding method and friction stir spot welding device
-
Application No.: US16313785Application Date: 2017-06-26
-
Publication No.: US11135674B2Publication Date: 2021-10-05
- Inventor: Ryoji Ohashi , Yoshitaka Muramatsu , Masahiro Miyake , Takuya Fukuda
- Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
- Applicant Address: JP Kobe
- Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
- Current Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
- Current Assignee Address: JP Kobe
- Agency: Oliff PLC
- Priority: JPJP2016-126342 20160627
- International Application: PCT/JP2017/023392 WO 20170626
- International Announcement: WO2018/003740 WO 20180104
- Main IPC: B23K20/00
- IPC: B23K20/00 ; B23K20/12 ; C21D1/18 ; C21D1/34 ; C21D9/50
Abstract:
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.
Public/Granted literature
- US20190314927A1 FRICTION STIR SPOT WELDING METHOD AND FRICTION STIR SPOT WELDING DEVICE Public/Granted day:2019-10-17
Information query
