ENHANCED-STRENGTH BIMETAL AND METHOD FOR MAKING IT Russian patent published in 2008 - IPC B32B15/01 B23K20/08 

FIELD: manufacture of important-designation composition parts operating under load at elevated temperatures when significant degradation of joints such as bimetallic inserts and electrodes occurs at electrolysis of melt metal salts.

SUBSTANCE: contact surface of non-detachable bimetallic joint of two different-hardness metals is in the form of alternating protrusions at side of soft and hard metals, said protrusions have "dove tail" cross section. Mechanical contact on apexes of protrusions is made, for example by explosion welding. Mechanical contact along lateral surface of protrusions is realized by fusion welding. Said protrusions are mutually parallel and they have predetermined parameters. Thin metallic gasket may be placed along contact surface. In blanks grooves with rectangular cross section are formed and after welding process shapes of said grooves are changed for trapezoidal ones for forming "dove tail" joints.

EFFECT: improved strength, lowered cost price of bimetallic joint.

10 cl, 2 dwg, 4 ex