Investment casting method of aluminum alloy pores

Abstract

The invention discloses an investment casting method of aluminum alloy pores. A ceramic slurry is filled in the wax matrix pores to directly prepare a ceramic mold core on the wax matrix, thereby implementing the integral forming of the mold core and mold shell, simplifying the technique and lowering the mold core manufacturing cost. A metal core bar is added into the ceramic mold core, thereby enhancing the strength of the ceramic mold core and also enhancing the joint strength between the ceramic mold core and mold shell. The method is simple and easy to implement, and has the advantages of low cost and high reliability.

Description

technical field [0001] The invention relates to an aluminum alloy casting process, in particular to an investment casting method for aluminum alloy pores. Background technique [0002] Aluminum alloy investment castings are mostly used in aviation parts. Its structure is usually ever-changing, especially it contains many pores with large depth-to-diameter ratio, and the casting process is very difficult. Aluminum alloy pores cannot be cast directly through the molten shell, and are generally manufactured by pre-embedded cores. The core can be divided into metal core, ceramic core and composite core according to the material. Chinese patent CN201410171350.4 discloses a method for aluminum alloy investment casting with a metal tube core. The core tube is left in the aluminum alloy casting at the end and does not need to be taken out. This method has two disadvantages: one is that the metal pipe core is difficult to process and the cost is high, and the other is that the met...

AI Technical Summary

Problems solved by technology

This method has two disadvantages: one is that the processing of the metal pipe core is difficult and costly, and the other is that the metal pipe core is left in the aluminum alloy casting, which will affect the performance of the aluminum alloy casting to a certain extent

This method has two disadvantages: one is that the composite core needs to be processed by a special core mold to form it, which increases the cost; the other is that the core and the shell are formed separately and then combined, which is cumbersome.

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