Srebrjansky G. Quality management of metal ribbon on the base of regimes improving of melt casting.

The dissertation is devoted to the improving of technology of amorphous and microcrystalline ribbons manufacture are made on ferrous base by one-wheel scheme casting melt and to finding dependencies between technological parameters and stability of a liquid melt bath in a nozzle-drum gap, magnetic properties and surface quality of received ribbons. The theoretical analysis of metal ribbon at all stages of formation from melt and interrelations of processes at each stage was made in this work. Heat transfer coefficient and cooling rate for melt and ribbon on a surface of drum - crystallizer were obtained experimentally. The behaviour of a ribbon outside a drum was also investigated. Characteristics of air boundary layer on the rotating drum that effects on a stream melt and quality of a received ribbon were determined. Ribbon formation mechanism was proposed for case of solidification completion outside a liquid bath. Liquid bath length defines thickness of received ribbons. It was shown, equipment constructive features and casting metal weight effects on a technology of reception of amorphous and microcrystalline ribbons in industrial conditions. This work results are used for amorphous and microcrystalline ribbons industrial manufacture on "Sirius" and "Rotor" type equipment.