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Abstract

This project aims to investigate the effects of high frequency (10 KHz - 20 kHz) vibration, applied to the ingot mould, on lubrication mechanisms to attempt to improve the surface condition of semi-finished products and, as far as possible, to eliminate low frequency oscillation. This report covers four aspects in succession: a brief summary of the literature; an exploratory phase aimed at preparing for tests on an industrial site; a series of tests on continuous billet caster in the UNIMETAL Neuves-Maisons France; laboratory investigations into the effect of high power ultrasonic vibration on the mechanisms involved in continuous casting ingot mould lubrication. Applying high-power ultrasonic vibration to a continuous billet casting mould causes two types of phenomenon: the friction forces between the steel and mould decrease as a function of the vibration amplitude; and the number and amplitude of surface ripples and solidification cusps are significantly reduced, considerably improving the surface of the product. Moreover, it was found possible to cast steels using ultrasonic vibration only for quite long periods (1 to 2 hours) provided certain conditions were respected. This was checked on hard and half-hard steels and at extraction speeds below 2.7 m/min.

Additional information

Authors: NOGUES M, Institut de Recherches de la Sidérurgie Française, Paris (FR);BEAUD C, Institut de Recherches de la Sidérurgie Française, Paris (FR);DAMOISELET M, Institut de Recherches de la Sidérurgie Française, Paris (FR);CLAESSEN P, Institut de Recherches de la Sidérurgie Française, Paris (FR);LARRECQ M, Institut de Recherches de la Sidérurgie Française, Paris (FR);ANTOINE M, Institut de Recherches de la Sidérurgie Française, Paris (FR)
Bibliographic Reference: EUR 15598 FR (1996) 82pp., FS, ECU 13.50
Availability: Available from the (2)
ISBN: ISBN 92-827-6476-1
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