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Stable Welding Quality

Perfect joints produced by solid state bonding.

Amazing Tensile Strength Joint section is stronger than base metal

Friction Welding - perfect solid state bonding
friction welding - Amazing Tensile Strength Joint section is stronger than base metal

The following is a summary of the results of verification tests for the strength for each type of joining technology.

When an up/down pull test was performed on various kinds of metals that had been joined by acetylene welding, CO2 arc welding, flash welding and friction welding, only the friction welded joint broke at the base metal.

This verifies the tensile strength attained by friction welding.

Test piece Yield point
N/mm²
Tensile strength
N/mm²
Stretch%
Normalizing
(base material)
43.12 687.96 29.0
Normalizing
->FW
401.8 697.76 28.0
Normalizing
->FW->Normalizing
429.24 692.86 29.0

Joined under the same kind of conditions found in outer space! The secret of consistent high quality.

friction welding

Oxygen in the atmosphere is the biggest enemy of joined metals. When there are blow holes or pin holes remaining in the joined section, it can be weakened by bending or pulling as well as cause rust to develop. Because the center part of the two metals cannot be joined with conventional welding, oxygen from the atmosphere remains and causes problems that cannot seem to be resolved.

With friction welding, the two piece of the work completely adhere to each other and generate heat, so it is as though the joining had been done in outer space. Dirt on the joining surfaces and impurities from oxidization interfering with the joining are sent to the outside of the joined section as burrs, enabling consistent high-quality products to be produced.

It is appealing because the control element is mass, so quality assurance can be easily maintained. No experience or special training is required, creating a work environment that anyone can quickly learn the process.

Has the same fatigue strength as the base metal!

friction welding - Has the same fatigue strength as the base metal!

The fatigue limit of the FW material rises slightly after friction welding. However, the limit returns to the same level as that of the base material if the FW material is normalized after friction welding.

Test piece Fatigue limit
N/mm²
Normalizing
(base material)
258.72
Normalizing
->FW
263.62
Normalizing
->FW->Normalizing
258.72

Distributes the hardness of the base metal.

friction welding - Distributes the hardness of the base metal.

The hardness of the portions around the FW point increases if the harden ability of the FW material is high. When normalized after friction welding, the hardness returns to the same level as the base material.

Perfect for joining dissimilar metals!

Perfect for joifriction welding - ning dissimilar metals!

Sufficient diffusion of material constituents is observed both when materials are similar and dissimilar, forming a complete bond at their FW points.

Consistent Quality Assurance

No special training or experience is needed.

Quality control is the most important point when introducing friction welding. Quality assurance can be easily maintained because the control element is mass.

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