To provide the joining structure and method of dissimilar metal materials small in electric resistance and excellent in heat resistance.
A first metal material 1 is made into a sintered alloy by infiltrating a cupper in the clearance between tungsten particles, after mold-pressing and false burning the tungsten particles while adding a very small quantity of additive. The diameter of the tungsten particle in the first metal material 1 is taken as 2 μm-15 μm. The rate of the tungsten in the first metal material 1 is taken as 55 wt.% or more. The cupper which is a jointing material 2 is joined to the cupper tungsten alloy which is the first metal material by a friction press-contact. Thereafter, the carbon steel which is a second metal material 3 is joined to the cupper which is the jointing material 2 by the friction press- contact.
| WO/2014/013001 | CAMSHAFT |
| WO/2014/039867 | SEALED TRANSVERSE LOCKING PIPE AND FITTINGS |
ITO YOSHIYASU
TOYODA TAKEO
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