METHOD FOR PRODUCING BIMETALS CONTAINING ALUMINUM AND ITS ALLOYS Russian patent published in 2006 - IPC B23K20/04 

FIELD: plastic metal working, possibly manufacture of flat bimetallic blanks of wide assortment by thickness and relation of layer thickness values.

SUBSTANCE: method comprises steps of making sub-layer on base of aluminum with single-side or double-side cladding layer of easy-to-melt metal; assembling pack of blank of steel, titanium, copper or aluminum and blank of aluminum or its alloy with sub-layer between them; further deformation of pack. According to invention blank of aluminum or its alloy is preliminarily heated till temperature consisting 0.68 - 0.76 of aluminum melting temperature. Pack is deformed by upsetting at reduction along height 10 - 30% and at deformation rate in range 0.005 -0.75 1/s for period of mutual contact of layers no less than 5 s while providing condition of melting easy-to-melt coating of sub-layer in contact zone. Sub-layer may have single-side cladding layer. Before assembling pack, sub-layer is applied by rolling process onto blank of steel, titanium or copper at easy-to-melt layer turned outside. Sub-layer may have double-side cladding layer. In such case pack is assembled of blanks of aluminum or its alloys and sub-layer is placed between them. Invention provides conditions for inter-layer liquid friction, for creating contact deformations, for breaking oxide film at side of aluminum blank, for occurring reliable inter-layer connection at wide range of thickness values and relation of layer thickness value.

EFFECT: enlarged assortment of flat bimetallic blanks by their thickness and relation of layer thickness values.

3 cl, 2 dwg