A crystallizer suitable for directional solidification of peritectic alloy simulants under the action of electric current

Abstract

The invention provides a peritectic alloy-like analogue directional solidification crystallizer suitable for working under the function of current and belongs to an experimental apparatus for peritectic alloy-like analogue directional solidification under the function of current. A melting-zone hot-end red copper heat-transfer plate and a melting-zone cold-end red copper heat-transfer plate are connected through glass sheets which are bonded with silica gel, so that the leak tightness of a melting zone is guaranteed to facilitate the formation of a stable temperature gradient GT at two ends of the melting zone, and the lateral heat dissipation is avoided. Besides, compared with the crystallizers manufactured by mechanical connection in the prior art, the crystallizer can control the temperature gradient in the directional solidification process more accurately, and provides the support for the experiment and real-time observation on directional solidification of high-melting point peritectic alloy-like analogues under the function of current.

Description

technical field [0001] A crystallizer suitable for directional solidification of quasi-peritectic alloy simulants under the action of electric current belongs to an experimental device for directional solidification of quasi-peritectic alloy simulants under the action of electric current. Background technique [0002] Among many intermetallic compounds, TiAl-based alloys with multiple peritectic reactions are excellent due to their high specific strength, high specific stiffness, high temperature oxidation resistance, creep resistance and hydrogen embrittlement resistance. Heat-resistant and lightweight materials will have great application potential in improving the working efficiency of engines. However, the poor room temperature plasticity of TiAl-based alloys is the main obstacle limiting the promotion and application of TiAl-based alloys. At present, controlling the solidification process of alloy materials is an important means to improve the performance of castings a...

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Problems solved by technology

However, the crystallizer adopts a mechanically connected structure, so that the sealing of the melting area cannot be guaranteed, and hot water is used as the heating medium, which is not conducive to forming a larger temperature gradient G at both ends of the melting area. T , and there is also the problem of lateral heat dissipation, which will cause the temperature gradient during the directional solidification process to be unable to be accurately controlled, resulting in increased instability in the directional solidification process of peritectic alloy simulants under the action of an electric field

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