The experiences, characteristics and use of such processes and techniques as rapid solidification, thixocasting, equal channel angular pressing (ECAP), drawing and protection of clad wires have been presented in the aspect of forming of metallic materials characterised by specific structure and properties. The equipment for the mentioned above techniques was designed and made in the Institute of Nonferrous Metals (INM) and allows the Institute to develop its research into the new materials of high usability for industrial application.
Rapid solidification method and melt spinning process are used in INM for production of amorphous and nanocrystalline soft magnetic Fe-based and Co-based ribbons. During fully automated melt spinning process molten alloy hits a fast rotating copper wheel and almost instantaneously releases continuous metal ribbons at the room temperature. They are excellent semi-product for magnetic cores production.
Thixocasting is based on ability of an alloy to regain its viscosity when stirring during solidification is used and when formation of nondendritic structure in an ingot takes place. This technology is used in INM for obtaining Al-based alloys as the semi-product for forging of car engine elements.
ECAP is one of the effective severe plastic deformation techniques, which enables to form laminar, fibrous and fine-grained structure. This method is developed in INM for Al-based alloys for automotive industry. The angular channel is mounted on the 60 T press. Multiple extrusion makes possible to reach grain size below 1 micrometer.
Drawing of clad wires is a special technology in which the steel core is drawn together with the Cu outer layer, leading to formation of bimetallic wire applicable for conductive connectors of electronic elements inside the glass and for telecommunication networks. The pilot production line includes also the equipment for modification and protection of the wire surface by oxidation, borax or nickel coating.