The improvement of strength and wear resistance at high temperatures by using cobalt-based alloys developed by dispersing intermetallics (Co3(Al,W))

 Tohoku University and Hitachi, Ltd. have developed Friction Stir Welding (FSW) tool that enables to weld materials with high melting points. Metals including steels, titanium and zirconium alloys have been difficult to weld by existing tools. The new FSW tool uses cobalt-based alloys that is developed by dispersing intermetallics (Co3(Al,W)) to realize higher strength and wear resistance than previous ceramic tools.
Ishida laboratory, Department of Metallurgy, Graduate School of Engineering, Tohoku University has discovered intermetallics (Co3(Al,W)) that maintain high strength at high temperature in 2006.


 The newly developed tool will be expected to be applied to an industrial field including power, chemical plants and automobiles. It is able to weld metals with high melting points including steels, titanium and zirconium alloys.

More Information (Japanese)


[Contact] (About Research Result)
Emeritus Professor Kiyohito Ishida
Department of Metallurgy, Graduate School of Engineering, Tohoku University
Address: 6-6 Aoba Aramaki Aoba-ku Sendai, Miyagi, 980-8579, Japan
Tel: +81-22-795-3984


Planning Office, Hitachi Research Laboratory, Hitachi, Ltd.
Address: 7-1-1 Oomika-cho Hitachi, Ibaraki, 319-1292, Japan
Tel: +81-294-52-7508
 

(Public Relations)

Hiroko Banba
Public Relations Division, Graduate School of Engineering, Tohoku University
Address: 6-6 Aoba Aramaki Aoba-ku Sendai, Miyagi, 980-8579, Japan

Tel: +81-22-795-5898
 

Public Relations, Corporate Brand and Communications Division, Hitachi, Ltd.
Address: 1-6-6 Marunouchi Chiyoda-ku, Tokyo, 100-8280, Japan
Tel: +81-3-5208-9324