A crystal selector for preparing directional solidification material and its application

A technology of directional solidification and crystal selector, applied in self-solidification, crystal growth, single crystal growth, etc., can solve the problems of equipment design difficulty, increased manufacturing cost, complicated manufacturing process, poor repeatability, etc., and achieve single crystal output The effect of high efficiency, low cost and high product versatility

Inactive Publication Date: 2016-06-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • A crystal selector for preparing directional solidification material and its application
  • A crystal selector for preparing directional solidification material and its application
  • A crystal selector for preparing directional solidification material and its application

Examples

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Embodiment 1

[0028] figure 1 It is a three-dimensional schematic diagram of a cylindrical cross-axis necking crystal selector, figure 2 is its cross-sectional diagram, image 3 is its bottom view. like figure 1 combine figure 2 As shown, the different-axis necking crystal selector of the present invention is a hollow mold, which is made by compression molding at one time, and the material is quartz, and the wall thickness is 3mm. The crystal selector includes seeding section A, crystal selection section B and shaping section C.

[0029] The seeding section A is a hollow cylinder, and its bottom is connected and fixed to the cooling seat (not shown) of the directional solidification device, and its bottom diameter is 80mm. The shape of the seeding segment A can match the shape of the directional solidification cooling base, including circular, oval, rectangular and other shapes.

[0030] The crystal selection section B is located above the seeding section A, and consists of two neck...

Embodiment 2

[0034] Figure 4 and Figure 5 They are the three-dimensional schematic diagram and the cross-sectional schematic diagram of the blade-shaped two-stage cross-axis necking crystal selector, respectively, Image 6 for its top view. like Figure 4 to combine Figure 5 As shown, the structure and size of seeding segment A and crystal selection segment B are the same as in embodiment 1, except that the main body of forming segment C is the blade shape of an approximate engine (such as Image 6 shown), but for the convenience of pouring, the top of the forming section C is still round, and the transition between them is designed to be smooth. The usage method is similar to that of Embodiment 1, and will not be repeated here. The crystal selector of this embodiment is used to produce superalloys used in aero-engines.

Embodiment 3

[0036] Figure 7 and Figure 8 They are the three-dimensional schematic diagram and the cross-sectional schematic diagram of the square column-shaped 4-stage cross-axis necking crystal selector, Figure 9 for its top view. As shown in the figure, the structural composition is similar to that of Example 1, except that the selected crystal section B is composed of 4 subunits, and the axis of each adjacent unit necking section is in the vertical projection plane and the projection point of the central axis oo' The angle of the connecting line is 90 degrees. The projection of the necking section 1 of the 4 subunits is as follows Figure 9 As shown, this has a better crystal selection effect. In addition, the diameter of the selected crystal section A is 100mm, the diameter of the narrowest part of the inner surface of the necking section 1 is 30mm, and the diameter of the narrowest part of the support column 2 is 24mm. The main body of the forming section C is a square column...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B11/00
Inventor 张深根刘赓潘德安刘波于鸣
Owner UNIV OF SCI & TECH BEIJING
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