Multi-layer sectional combined type split special-shaped crystallizer for electroslag casting of blade

Abstract

The invention discloses a multi-layer sectional combined type split special-shaped crystallizer for electroslag casting of a blade. The multi-layer sectional combined type split special-shaped crystallizer comprises a plurality of crystallizer layer molds which are sequentially connected from bottom to top, and a layer mold connecting device is arranged between every two adjacent crystallizer layer molds; each crystallizer layer mold comprises a layer mold support, each layer mold support is provided with a crystallizer layer cavity, and a plurality of the crystallizer layer cavities vertically communicate with one another to form a special-shaped mold cavity; and a layer cavity cooing device is arranged on each layer mold support. According to the multi-layer sectional combined type splitspecial-shaped crystallizer for electroslag casting of the blade, the crystallizer is arranged to be of a structure composed of multiple layers of the crystallizer layer molds, the height of each layer can be reasonably designed according to the shape of the crystallizer layer cavity of the corresponding section, in the using process, one layer is connected with the last layer after being obtained through electroslag casting, and after layer-upon-layer casting is completed, the blade is formed; the problem that a consumable electrode can not be easily inserted into the special-shaped mold cavity can be solved, an electroslag casting technology can be applied to blade casting, and the blade with the compact structure, the high quality and the long life is produced; and the crystallizer isarranged in a multi-layer mode, and therefore replacement and maintenance are easier when one layer of the structure is damaged.

Description

technical field [0001] The invention relates to a crystallizer, in particular to a multi-layer, segmented and combined split special-shaped crystallizer for electroslag melting casting blades. Background technique [0002] Currently known blades and helical blades are formed by melting and casting sand molds, that is, the workpiece model is first manufactured, then the sand mold is made, liquid steel (or other metal alloys are poured into the sand mold), and the sand mold is removed after the metal is cooled to obtain the workpiece. The blades and spiral blades cast by this method are loose in the blade internal structure during the casting process, and internal defects such as pores and cracks are prone to occur, the overall quality is not high, and the service life is short. [0003] Electroslag casting is an electroslag metallurgical process that completes metal refining and casting forming at one time to produce high-quality alloy castings. Its basic equipment includes e...

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Problems solved by technology

[0004] However, in practical applications, because the blades (such as generator impellers, spiral blades, etc.) are parts with more complex curved surfaces, the special-shaped cavity also becomes a more complex shape that matches it; in addition, the walls of the cavity are mostly conductive metal materials. The consumable electrode not only needs to be made into a structure similar to the special-shaped cavity to form uniform droplets, but also the consumable electrode must not touch the cavity wall to cause a short circuit, so it is difficult for the consumable electrode to smoothly extend into the special-shaped cavity. The formation of good molten dripping in the cavity makes it difficult to apply the electroslag casting technology in the blade casting industry, and there is no related technology that can solve the above problems

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