Method for improving crystallization compactness of product during casting and pouring of aluminum

Abstract

The invention relates to a method for improving the crystallization compactness of a product during casting and pouring of aluminum. The method mainly comprises a plurality of casting working procedures of raw material preparation, mold preparation, pouring preparation, standing and solidification, finishing operation and the like. The method can solve the following problems of an existing aluminum liquid in the pouring process, a, when large aluminum pieces are poured, the molten aluminum pouring time is different, due to the fact that the temperature change is large, the aluminum liquid is prone to caking inside the aluminum liquid in the placing process, the density of the formed aluminum pieces is affected, the formed aluminum piece quality is caused to fail to reach the stipulated requirements, and materials are wasted; and b, the instantaneous temperature of the molten aluminum flowing out of a pouring machine during the pouring process is suddenly reduced, the surface of the molten aluminum is caused to occur the skinning, the temperature of the aluminum liquid is rapidly reduced during the conveying, the fluidity of the molten aluminum injected into the mold is influenced,and a gap exists between the poured aluminum liquid and the interior of the mold.

Description

technical field [0001] The invention relates to the technical field of aluminum casting technology, in particular to a method for improving the crystallization compactness of products during aluminum casting. Background technique [0002] Casting is the process of pouring smelted metal liquid into the mold, cooling and solidifying to obtain the required shape and performance of the parts. Among them, the aluminum casting process is frequently used in workpiece casting operations. The casting process mainly includes the following steps, raw material preparation, mold preparation, pouring preparation, static solidification and finishing operations, etc. The density of aluminum casting workpieces depends on the production process. The internal density requirements in the process must be able to meet the requirements in order to meet the normal use of cast products. [0003] However, the following problems exist in the pouring process of the existing aluminum liquid. a. When po...

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Problems solved by technology

[0003] However, the following problems exist in the pouring process of the existing aluminum liquid. a. When pouring large aluminum parts, the pouring time of the aluminum liquid is different, and the temperature changes greatly. As a result, the quality of the formed aluminum parts does not meet the specified requirements, wasting materials, and the instantaneous temperature of b liquid aluminum flowing out of the pouring machine during the pouring process drops sharply, resulting in conjunctiva on the surface of the aluminum liquid, and the aluminum liquid is being transported The rapid drop in temperature affects the fluidity of the molten aluminum poured into the mold, leaving a gap between the poured aluminum liquid and the interior of the mold

[0004] For the technical problems existing in the aluminum casting process, personnel in the related technical field have conducted research and made adaptation improvements. For example, the patent number is 2017107633564, an aluminum-chromium alloy casting process with high impact toughness and elongation. High, good castability, wide range of applications, however, the problems in the aluminum casting process mentioned above need to be solved urgently

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