Atmospheric oxygen is the archenemy of metal bonding. If blow holes or pin holes remain in the bonded part, strength may weaken when subjected to bending or pulling, and this may result in rust formation.
With standard welding, the middle part of the material cannot be bonded, and atmospheric oxygen therefore remains. With friction welding, on the other hand, two workpieces are bonded when brought into complete contact with one another. As a result, bonding is carried out under almost the same conditions as in outer space where there is no atmosphere. Impurities such as dirt on the bonding surface, and oxide films, etc. which hinder bonding are pushed out as burrs, ensuring that high-quality products are produced every time.
Furthermore, quality assurance is easy as the control factor is the physical quantity involved. No experience or skill is required.
