Device and method for controlling solidification through vibration

Abstract

The invention relates to a device and method for controlling solidification through vibration. The device comprises a crystallizer, a molten pool, a crystallizer base, cooling systems and vibration generating devices. The crystallizer is arranged above the crystallizer base, the crystallizer is composed of two crystallization rollers rotating reversely and baffles at the two ends, the crystallization rollers on the two sides are in contact along the axial line, the molten pool is arranged between the upper areas of the crystallization rollers on the two sides, and the vibration generating devices are symmetrically arranged on the front side and the rear side below the crystallization rollers on the two sides correspondingly. The vibration generating devices are fixedly connected with the bottom of the crystallizer base, and the cooling systems are arranged at the front end portions and the rear end portions of the crystallization rollers on the two sides correspondingly. According to the device and method, stable control over the solidification process can be achieved, the free energy difference of a liquid phase and a solid phase is effectively reduced, the solidification temperature is increased and accurate, strip billet grains are refined, the process is more stable, the quality of a formed strip billet is higher, and the problem caused by unstable solidification due to a small double-roller thin strip casting and rolling molten pool can be better solved.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a device and method for controlling solidification by vibration. Background technique [0002] Conventional continuous casting equipment adopts crystallizer vibration. The vibration modes are sinusoidal vibration and non-sinusoidal vibration. The relationship between the speed and time of sinusoidal vibration is a sinusoidal curve. The speed is equal. During the vibration cycle, there is always relative motion between the casting slab and the mold, and during the mold descending process, there is a short period of descending speed greater than the casting speed, which can well promote the stripping between the mold and the new slab shell , prevent and eliminate the bonding between the billet shell and the inner wall of the crystallizer, and can heal the cracked billet shell, so as to obtain a good casting billet surface. In the positive sliding time of the non...

AI Technical Summary

Problems solved by technology

However, the vibratory twin-roll thin strip casting machine adopts the vibration mode of one casting roll and the fixed mode of the other casting roll. The influence of vibration on the molten pool in the casting rolls is uneven. The two-roll casting rolls are used as molten pool crystallizers The influence of the sidewall on the solidification process of the metal in the molten pool is inconsistent

Therefore, there are certain deficiencies in the prior art, and there is room for further improvement and perfection.

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