A crystal selector for preparing directional solidification material and its application

Abstract

The invention relates to a crystal selector for preparing a directional solidification material and an application thereof, and belongs to the field of metallic material preparation. The crystal selector comprises a crystal introducing section (A), a crystal selecting section (B) and a formation section (C), wherein necking sections (1) are matched with corresponding crystal breeding sections (2) so as to serve as subunits of the crystal selecting section (B), the crystal selecting section (B) comprises more than two subunits, and the necking sections (1) are arranged in a heteraxial manner. The crystal selector adopts a multistage heteraxial necking type crystal selection method. Compared with crystal selection mechanisms of other equipment for preparing the directional solidification material, the crystal selector is simple in structure, easy to manufacture, stable in process, low in cost and high in single crystal output rate, has relatively high equipment universality and product universality and can be used for preparing magnetic anisotropic metal magnetic materials with dimension requirements and structure requirements and structure anisotropic metal structural materials.

Description

technical field [0001] The invention relates to a crystal selector, in particular to a multi-neck type crystal selector, which belongs to the field of metal material preparation. Background technique [0002] During the directional solidification process, through the preferential growth of crystals and the effect of crystal selection, the growth of other grains is inhibited, and finally the preferred growth of the grains grows to obtain a single crystal. Common crystal selection methods can be summarized into four types: turning type, inclined type, necking type and spiral type. At present, the most commonly used are mainly two types of necking type and spiral type. Neck-type crystal selector mold manufacturing is relatively simple. The principle of the ordinary necking type crystal selection method is to eliminate crystal grains according to the relationship of the cross section, and only allow those columnar crystals corresponding to the necking cross section to enter th...

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Problems solved by technology

In addition, although the spiral crystal selection method described in Chinese patent 1295140A has good crystal selection characteristics through the coupling effect of crystal preferential growth and continuous bending and climbing helical structure, it has a space spiral shape mold manufacturing process with relatively high size requirements. Complex and easy to deform, low efficiency, poor repeatability; and some new mechanical automation molds, such as Chinese patent 102205391A, put forward new requirements for the size and function of directional solidification equipment, especially equipment with vacuum requirements, making equipment design difficult and manufacturing Increased costs

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