Preparation method and device of semi-solid slurry

Abstract

The invention relates to a preparation method and device of semi-solid slurry and belongs to the technical field of semi-solid formation. The preparation method comprises the steps that molten metal melt is poured into a crucible container and cooled in the crucible container to the temperature between the liquid phase line temperature and the solid phase line temperature; inert gas shielding or vacuum shielding is performed on the melt in the cooling process of the metal melt, the metal melt in the crucible is subjected to weak disturbance treatment under the outfield effect, the liquid surface of the melt in the crucible is kept to be static or the melt keeps a weak laminar motion in the horizontal direction during disturbance treatment, surface layer oxide or gas is prevented from beinginvolved in, the outfield effect is stopped when the melt is cooled to be within the semi-solid temperature interval, and the semi-solid slurry in the crucible is poured into a pressure forming apparatus. The invention further discloses the preparation device adopted in the method. The semi-solid slurry prepared by the method and the device has the advantages of being high in purity, good in quality and consistency, easy to industrially produce and control, and the like.

Description

technical field

[0001] The invention relates to a method and device for preparing semi-solid slurry, in particular to a method for preparing semi-solid slurry of aluminum alloy and magnesium alloy, belonging to the technical field of semi-solid forming. Background technique

[0002] Semi-solid forming technology is a metal forming technology between solid state forming and liquid forming. This forming technology has the advantages of low flow stress in liquid forming, fast forming speed, and the ability to form parts with complex shapes. It also has the advantages of no casting defects, high dimensional accuracy, and good performance in solid-state plastic forming. Therefore, it has attracted widespread attention. One of the cores of semi-solid forming technology is the preparation of semi-solid slurry. Traditionally, a semi-solid billet is prepared by heating a solid billet with a special microstructure to a semi-solid temperature range through electromagnetic induction. ...

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