A casting method for high temperature alloy thin-wall hollow casting

Through the method of flip casting and rapid cooling of the cold air platform, the problem of interface reaction of thin-wall hollow castings in high-temperature alloys during casting is solved, the surface quality and pass rate of castings are improved, and an efficient and environmentally friendly casting process is achieved.

CN115815574BActive Publication Date: 2025-03-25AECC AVIATION POWER CO LTD
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Patent Information

Application Number
CN202211567025.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-12-07
Publication Date
2025-03-25
Estimated Expiration
2042-12-07

AI Technical Summary

Technical Problem

Existing high-temperature alloy thin-wall hollow castings are prone to interfacial reactions during casting, resulting in a decrease in the surface quality of the channels in the castings and lack of efficient and environmentally friendly removal methods of alumina-based ceramic core.

Method used

The flip casting method is used to pour the high-temperature alloy metal liquid into the shell with a silicon-based ceramic core. After the casting is completed, the compressed air blows from bottom to top through the cold air platform to accelerate the cooling, shortening the residence time between the metal and the ceramic core, thereby suppressing the interface reaction.

Benefits of technology

It effectively suppresses the reaction of the core and shell, improves the surface quality of the casting, improves the casting pass rate by about 40%, and maintains the original performance of the ceramic core material.

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Abstract

The present invention discloses a method for casting a thin-walled hollow casting of a high-temperature alloy, and belongs to the field of precision casting technology. The method for casting a thin-walled hollow casting of a high-temperature alloy of the present invention blows cold air from bottom to top on the mold shell immediately after the casting is completed, so as to accelerate the heat dissipation process of the high-temperature metal, increase its cooling rate, shorten the residence time of the metal and the silicon-based ceramic core at above 1500°C, and further inhibit the interface reaction between the metal and the silicon-based ceramic core. Combined with the rapid cooling method, the present invention can simultaneously reduce the interface reaction between the metal and the ceramic shell at high temperature. The present invention does not need to change the method for making the ceramic core material, and maintains the original pouring temperature to ensure that the casting has no defects such as cold shut and looseness, which not only improves the surface quality of the channel inside the casting, but also improves the surface quality of the contact surface between the casting and the shell.
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