METHOD FOR OBTAINING A TWO-LAYER COMPOSITE MATERIAL FOR DISCONTINUOUS ELECTRICAL CONTACTS Russian patent published in 2023 - IPC H01H1/02 C22F1/16 C22F3/02 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering, in particular to the production of composite materials with a copper matrix, and can be used for the manufacture of electrical break contacts. The effect is achieved due to the fact that the method for obtaining a two-layer composite material for discontinuous electrical contacts includes free filling of the powder of the arc-resistant component into the crucible-mould, impregnation with copper melt at low-frequency vibration and subsequent crystallization of the melt, at the same time, the powder of the arc-resistant component is pre-dried to a moisture content of less than 1%, then a copper component is placed on its surface in the form of a plate of cast copper, then the powder is compacted with a pressure of 70-400 N/cm² on the plate, after which the resulting workpiece is heated in a resistance furnace to a temperature 1250-1350°C in an argon atmosphere, kept at this temperature for 10-15 minutes, and the treatment of the resulting composition with low-frequency vibration is carried out at an oscillation amplitude of 0.1-0.2 mm and a frequency of 50-80 Hz in an argon atmosphere for 10 -15 minutes and refrigerate with oven in the same atmosphere. In this case, at least one substance selected from the group containing Cr, W, Cr₃C₂, WC is used as an arc-resistant component.

EFFECT: reducing the transition resistance and increasing the arc resistance of the contacts; method also makes it possible to simplify and reduce the cost of the technological process for obtaining arc-resistant composite alloys "copper-arc-resistant phase" for discontinuous electrical contacts while increasing the functional properties of electrical contacts.

2 cl, 2 dwg, 3 ex