METHOD OF DIFFUSION WELDING OF FERRITES WITH METALS THROUGH INTERMEDIATE COPPER GASKET Russian patent published in 1995 - IPC

FIELD: diffusion welding equipment. SUBSTANCE: method comprises steps of preliminary deposition of a layer of argentum, having thickness (1-2)micrometers, on a copper gasket; placing the gasket between surfaces of parts to be welded; heating the parts up to a welding temperature with a rate 0.05-0.10 C/s; pressing by an effort, equal to (3-5)MPa, keeping 60-100 minutes and cooling (with maintaining the pressure) with a rate 0.016-0.02 C/s up to 20 C; keeping over 30 minutes at temperature 700 C and 550 C respectively. The above mentioned manufacturing modes provide a lowered level of residual stresses, increased strength of the joint, prevention of ferrite destruction, enhancing quality of a welded seam. EFFECT: enhanced quality of a welded seam at welding ferrospinel due to lowered stresses in a joint zone. 1 cl