METHOD OF SOLDERED JOINT MANUFACTURING Russian patent published in 2020 - IPC C03C27/02 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to production of metal-glass articles, mainly for electrotechnical industry, intended for operation under conditions of increased electrical and mechanical loads, such as connectors, sealed leads, etc. Method of brazed joint manufacturing includes assembly of sealed lead from at least one current lead assembly and glass and metal parts covering it with subsequent soldering in argon medium, holding at soldering temperature 20–30 minutes and further cooling. Before soldering, the current lead and the glass part are fixed in the cylindrical hole of the metal part. Soldering is carried out simultaneously with pressing of glass part by puncheons, one of which is movable, isolated from glass part by graphite washers made with high class of surface cleanliness. Pressing is carried out on the condition to ensure the specific pressure on glass piece (0.045–0.055) kg/cm² at temperature (860±10) °C. After holding, the assembly is cooled at rate of (5±1) °C/min to temperature (400±10) °C, and then with the furnace switched off.

EFFECT: improvement of quality of the junction at provision of high tightness of the soldered connection.

1 cl, 1 dwg