Liquid metal cooled single crystal furnace for large-sized blades

The liquid metal cooling single crystal furnace is an advanced equipment for preparing large-sized single crystal blades. Its core technology is to use the high thermal conductivity of liquid metal to achieve efficient directional solidification. The following is a detailed introduction to this single crystal furnace:

Working Principle

The liquid metal cooling single crystal furnace directly immerses the casting mold into a low-melting-point liquid metal molten pool, using the high thermal conductivity of liquid metal to replace traditional radiation heat transfer. This cooling method can significantly improve the temperature gradient and cooling rate, thereby forming a high-quality single crystal structure during directional solidification.

Main Features

High temperature gradient: Liquid metal cooling technology can achieve a higher temperature gradient than traditional methods, which is helpful for preparing large-sized and complex-shaped single crystal blades.

Multi-layer close-packed arrangement: By optimizing the wax pattern combination and adopting a multi-layer close-packed method, more single crystal blades can be prepared in a single furnace, significantly improving production efficiency.

Dynamic thermal insulation layer: A layer of hollow alumina balls is pre-laid on the surface of the low-melting-point metal molten pool as a dynamic thermal insulation layer with a thickness of 30-100mm to isolate the heat of the insulation furnace and ensure the thermal insulation effect during directional solidification.

Application Cases

Preparation of large-size single crystal blades: Using liquid metal cooling single crystal furnaces, large-size single crystal blades with a maximum length of 460mm can be prepared.

Gas turbine blades: Through simulation and experimental research, after optimizing process parameters, large-size gas turbine blades with high quality were successfully prepared.

Advantages

Improve production efficiency: Using multi-layer close-packed technology, more blades can be prepared in a single furnace, and production efficiency is significantly improved.

Improve product quality: High temperature gradient and cooling rate help reduce casting defects and improve the quality of single crystal blades.

Liquid metal cooling single crystal furnaces have important application value in the field of high-end equipment manufacturing such as aircraft engines and gas turbines, and are an important development direction for single crystal blade preparation technology in the future.