METHOD OF SURFACING MONOLYLE OF COPPER BULBS TO METAL CONTACT SURFACE OF HEAT EXCHANGER Russian patent published in 2017 - IPC C23C24/08 C23C30/00 B22F7/04 F28F13/18 

FIELD: heating system.

SUBSTANCE: contact surface of the heat exchanger is pre-coated with a layer of high vacuum oil, the heat exchanger is placed in a sintering container, the container is filled with copper balls with a size of 100 to 500 mcm, the copper balls that have not adhered to the high-vacuum oiled surface are poured from the said container and poured into a sintering container With excess beads of alumina that are equal to or less than copper balls, load the container into a vacuum oven with a vacuum level of at least 10-5 Mm Mercury column and heated to a sintering temperature of 800 to 900°C. Heating is carried out with holding at the boiling point of a high-vacuum oil for complete removal of oil vapours. The monolayer is then sintered from the copper balls to the contact surface of the heat exchanger for 2 to 4 hours.

EFFECT: monolayer of metal balls is welded to predetermined areas of the heat exchanger surface, regardless of their spatial orientation.

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