A kind of preparation method and application of refiner

Abstract

The invention relates to the technical field of precision casting, in particular to a preparation method and application of a refiner. Select Ni, Al, WC, Co and other powders according to a certain mass percentage and particle size requirements, and mix them into powder. The cold isostatic pressing technology is used to press and form at room temperature and a pressure of 10-60 MPa; the refiner is ultrasonically cleaned with alcohol and dried at a temperature of 50-100 °C. When pouring at the end, add refiner, and at the same time ensure that the temperature of the alloy liquid is within the range of 1500-1750°C, the pouring time is 10-120 seconds, the holding time is 1-3 minutes, the addition amount is 0.01-0.5wt%, and argon is blown into the pouring chamber Gas, stir with a corundum rod, and observe the grain size of the sample after cooling. The invention is applicable to the casting process of all metal materials, can effectively solve the problem of quality reduction of castings caused by coarse high-temperature alloy crystal grains, has simple operation, low cost, high economic benefits and long-term application prospects.

Description

A kind of preparation method and application of refiner technical field The present invention relates to precision casting technical field, be specifically a kind of preparation method and application of refiner. Background technique Ordinary polycrystalline casting superalloys still have a wide range of applications in modern aerospace engines and industrial gas turbines. The cast superalloys used, especially at low and medium temperatures, are basically in the polycrystalline state. In ordinary investment casting The polycrystalline superalloy castings produced under the conditions are relatively coarse dendrites or columnar crystals, which lead to the reduction of the mechanical properties of the castings. Affect the work efficiency of key components such as engines and gas turbines. SUMMARY OF THE INVENTION The object of the present invention is to provide a kind of preparation method and application of refiner, be applicable to the casting of all metal materi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method and application of a refiner, which is suitable for the casting process of all metal materials and can effectively solve the problem of casting quality degradation caused by coarse crystal grains

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