Vacuum/gas shield electroslag remelting continuous directional solidification device and method

Abstract

The invention relates to an electroslag remelting technique, in particular to a vacuum / gas shield electroslag remelting continuous directional solidification device and method. The device comprises a power supply, a consumable electrode (1), a water-cooling crystallizer (2) and a gas shield system, wherein the lower part of the water-cooling crystallizer (2) is provided with a water-cooling chassis (7) and a stripping device (13), and a two-circuit control mode is adopted by the consumable electrode (1) to make the stripping speed equivalent with the solidification speed of a cast ingot. The invention has simple operation and low cost, is convenient to control, can be used for producing large-dimension low-segregation directional solidification cast ingots and is suitable for mass production and application.

Description

technical field

[0001] The invention relates to an electroslag remelting technology, in particular to a vacuum / gas protection electroslag remelting continuous directional solidification technology. Background technique

[0002] Ingot billet opening is the first process of deformed alloy processing. Its purpose includes two aspects. One is to break the as-cast structure to obtain uniform and fine equiaxed grain structure and improve the plasticity of the material; the other is to change the geometry of the ingot for the next step. processing. However, for high-alloyed metal materials, such as tool and die steels, hard-to-deform superalloys, etc., due to the large amount of alloying elements, the alloy will form serious element segregation during solidification, so that coarse precipitates are formed between dendrites, and at the same time This type of alloy has a low melting point, high dynamic recrystallization temperature, poor plasticity, and a narrow optimal plastic temp...

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