Specialized furnaces with integrated presses provide superior control of pressure and temperature to create better diffusion bonds when joining similar or dissimilar metals.
Diffusion bonding has been utilized to join high-strength and refractory metals – those that are either difficult or impossible to weld by other means – for many years. The process, which involves applying high temperature and pressure to similar or dissimilar metals mated together in a hot press, causes the atoms on solid metallic surfaces to intersperse and bond. Unlike traditional brazing techniques, the resulting bond exhibits the strength and temperature-resistance of the base metals. It also eliminates the need for filler material that affects the final weight and dimensions of the mated metals.