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A kind of rapid directional solidification equipment and rapid directional solidification method

A directional solidification and rapid technology, applied in the direction of self-solidification, chemical instruments and methods, polycrystalline material growth, etc. The effect of grain refinement and obvious orientation

Active Publication Date: 2017-11-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a rapid directional solidification equipment and a rapid directional solidification method, which are used to solve the problems of ultra-high temperature gradient and rapid growth that cannot be realized by the existing directional solidification technology, and the rapid directional growth that cannot be realized by rapid solidification. The obtained The material is single crystal and oriented polycrystalline material with fast directional solidification structure

Method used

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  • A kind of rapid directional solidification equipment and rapid directional solidification method
  • A kind of rapid directional solidification equipment and rapid directional solidification method
  • A kind of rapid directional solidification equipment and rapid directional solidification method

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Comparison scheme
Effect test

Embodiment 1

[0051] like figure 1 As shown, the rapid directional solidification equipment of the present invention comprises a vacuum chamber 1, an electron beam emitting device 2, a first drawing system, a first cooling system, a second drawing system and a second cooling system 6, at the bottom of the vacuum chamber 1 Opposite to the top, a bottom through hole and a top through hole are provided (that is, the bottom through hole is coaxially arranged with the top through hole), and an electron beam window 11 is opened on the middle side wall of the vacuum chamber 1; the electron beam emitting device 2 is arranged on The outside of the vacuum chamber 1, and the electron beam emitted by the electron beam emitting device 2 can enter the vacuum chamber 1 through the electron beam window 11; the first drawing system includes a first drawing rod 31 and a cooling tube 32, the first drawing rod 31 is hollow and Vertically inserted into the vacuum chamber 1 through the bottom through hole, the f...

Embodiment 2

[0062] The magnetostrictive material (Fe 0.83 Ga 0.17 ) 99.9 La 0.1 , including the following steps:

[0063] 1. Ingredients

[0064] The purity of the selected raw materials Fe, Ga and La is greater than 99.99wt%, and in order to prevent elements from burning during the smelting process, when the Fe, Ga and La raw materials are prepared according to the above-mentioned composition, they are added according to the burning loss of about 1wt%. Ga and La, after weighing each raw material, set aside.

[0065] 2. Preparation of master alloy ingot

[0066] Put the above-mentioned raw materials Fe, Ga and La into the crucible of the vacuum non-consumable arc melting furnace. When placing, put the metal elements that are easy to burn at the bottom of the crucible, and the metal elements that are not easy to burn at the top of the crucible .

[0067] Vacuumize the vacuum non-consumable arc melting furnace to 4.0×10 -3 After Pa, fill the furnace body with high-purity argon gas, ...

Embodiment 3

[0078] Prepare rod-shaped material (Mn 54 Al 46 ) 0.97 C 0.03, wherein the rapid directional solidification equipment of embodiment 1 is used to directional solidify the material, and the temperature gradient of the directional solidification is controlled to be 3×10 5 K / cm, the growth rate is 10mm / s, and the prepared composition is (Mn 54 Al 46 ) 0.97 C 0.03 rod material.

[0079] (Mn 54 Al 46 ) 0.97 C 0.03 The metallographic diagram of rapid quenching in the longitudinal section of the material is as follows Figure 7 shown, where Figure 7 The central portion is the morphology of the melting zone formed by electron beam heating alloy, the melting zone shape is slightly convex, and the length of the melting zone is about 1 mm, which shows that the method of the present invention is effective in preparing (Mn 54 Al 46 ) 0.97 C 0.03 A stable melting zone of about 1 mm can be obtained for alloy materials.

[0080] The above prepared (Mn 54 Al 46 ) 0.97 C 0....

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Abstract

The invention provides rapid directional solidification equipment and a rapid directional solidification method. The rapid directional solidification equipment comprises a vacuum chamber, an electron beam emission device, a first drawing system, a first cooling system, a second drawing system and a second cooling system, wherein the first drawing system comprises a first hollow drawing rod capable of ascending, descending and rotating and a cooling pipe arranged in the first drawing rod; the first cooling system comprises an internal cavity and an external cavity; the internal cavity is formed outside the first drawing rod in an enclosing manner, and the external cavity is formed outside the internal cavity in the enclosing manner; the second drawing system comprises a second drawing rod capable of ascending, descending and rotating; the second cooling system is arranged above the first cooling system, and forms a gap with the first cooling system; electron beams emitted by the electron beam emission device can penetrate through the gap. The rapid directional solidification equipment can reach the cooling speed of 5x10<5>K / s, and can be used for preparing mono-crystalline and oriented polycrystalline materials with rapidly and directionally solidified structures.

Description

technical field [0001] The invention relates to a directional solidification device, in particular to a rapid directional solidification device and a rapid directional solidification method. Background technique [0002] Solidification is the most common phenomenon in which substances change from liquid to solid in nature, and it is also the basic process for the preparation of materials, especially metal materials. The progress of solidification science and solidification technology promotes the development of human material science. The research on traditional solidification theory and technology is mainly carried out around the casting process of ordinary castings and ingots. With the introduction of modern solidification theory, solidification science has made important progress: such as the emergence of continuous casting technology, directional solidification and single crystal growth. The improvement of technology, the emergence and application of rapid solidification...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B28/06C30B29/52C30B11/00
CPCC30B11/00C30B28/06C30B29/52
Inventor 蒋成保吴煜烨孟崇峥王敬民张天丽刘敬华徐惠彬
Owner BEIHANG UNIV