BIMETALLIC COMPOSITION AND METHOD OF MANUFACTURE THEREOF Russian patent published in 2000 - IPC

FIELD: metalworking. SUBSTANCE: group of inventions relates to pressure treatment of metals and particularly to manufacturing layered materials in rolls by means of joint plastic deformation. Coating material in bimetallic composition is copper-nickel alloy Cu75Ni25 conferring white color, nickel brass (75/5) conferring gold-yellow color, or copper conferring red color. Main layer material is nickel or copper-nickel alloy. Thickness of clad layers constitutes 40.0-49% of total thickness of composition on each side and that of main layer 2.0-20.0%. Constituents of bimetallic composition are degreased, etched, subjected to joint plastic deformation with degree of deformation 60-70%, heat treatment at 500-670 C followed by cooling to temperature no higher than 150 C, and final cold rolling with degree of deformation 32-45%. EFFECT: enabled manufacture of bimetallic composition with different color spectrum and different resistivity and magnetic conductivity. 2 cl, 1 dwg, 3 ex