Title: Casting laser liquid phase joining as a method of producing multi layered composites

Abstract

In modern production, the use of one or another method for obtaining layered composite materials is determined by the properties of the starting materials, the shape of the manufactured metal products, the conditions of its operation and the methods of processing products. Methods for manufacturing layered composites can be classified based on the nature of the processes at the interface between the components: metallurgical, diffusion, or adhesive. The strongest connection occurs under the conditions of metallurgical processes. However, the size of the transition layer (connection layer) should be as narrow as possible, since otherwise the mixing of the components (especially dissimilar ones) leads to deterioration in the quality of the raw materials used. And, in the end, to a deterioration in the quality of the product as a whole. The solution of this problem is facilitated by the use of a concentrated source of local heating - laser radiation. In the development of previously developed traditional technologies, this work provides for the creation of a new hybrid method of casting-laser processing for the production of bimetallic and multilayer products, which makes it possible to combine the advantages of using concentrated energy sources with traditional foundry technologies for the production and restoration of machine parts. The method allows obtaining significant technical and economic results, of which the most important are: an increase in the service life of machine parts by 2.5 - 6.0 times compared to serial products and a reduction of up to 70 - 80% of the cost of high-alloy expensive materials.