Osaka University: High-strength bonding of dissimilar materials with electricity and pressure! : Titanium x stainless steel
Osaka University Institute for Join Science:
We have developed a technology for joining dissimilar materials with greater strength than the original material.
Unique technology “pressure control voltage contact method” that heats the joint by passing electricity while applying pressure to the material
Titanium x stainless steel:
Succeeded in strong bonding of titanium alloy and stainless steel.
It can be joined in an extremely short time of 1 second and at a low temperature.
It saves energy and reduces carbon dioxide emissions.
If the temperature and pressure conditions are known, it can be applied to various metals.
What is pressure control voltage contact method?
Pressure control voltage contact method
At room temperature, to the extent that it does not deform
Apply pressure,
When energized
Only the interface where the materials are in contact is joined using Joule heat, which becomes hot.
Materials that have deteriorated due to heating
Pushed out by pressure
Because the other parts do not deteriorate
The strength of the original material is maintained.
Field of use:
Even different materials with different strengths can be joined by “controlling the pressure so that the strengths of both interfaces are equal”.
With high-strength titanium alloy at low temperature
Stainless steel that keeps strength at high temperatures
Bonding was performed by “controlling the pressure so that the interface temperature reaches about 870 ° C, which has the same strength”.
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