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High-throughput preparation method for metal parts

A metal parts, high-throughput technology, applied in the field of high-throughput preparation of metal parts, can solve the problems of increasing the research cycle and cost of materials, improve mechanical properties and yield, improve solidification structure, and reduce shrinkage cavities. Effect

Pending Publication Date: 2021-08-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing directional crystallization technology can usually only produce metal ingots, and further processing and shaping can be used to obtain metal parts
Moreover, only a single metal casting can be obtained through a single experiment, which will undoubtedly increase the research cycle and cost of materials

Method used

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  • High-throughput preparation method for metal parts

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Effect test

preparation example Construction

[0031] The invention provides a high-throughput preparation method of metal parts, comprising the following steps:

[0032] Placing raw metal into high-throughput molds;

[0033] In a protective atmosphere, the metal raw material in the high-throughput mold is heated and melted, and after the metal melt is obtained, the metal melt is subjected to directional crystallization;

[0034] The number of part sample slots in the high-throughput mold is ≥ 4, and the shape of the part sample slots is the same as that of the metal part.

[0035] The present invention puts the metal raw material into the high-throughput mold; in the present invention, the number of part sample slots in the high-throughput mold is ≥4, preferably 4 to 19. In a specific embodiment of the present invention, The number of the part sample slots is preferably 4, 6, 16 or 19.

[0036] In the present invention, the shape of the part sample groove is the same as the shape of the metal part, and the shape of the ...

Embodiment 1

[0078] The high-throughput mold 6 (100mm in diameter and 150mm in height) for processing BN material is evenly distributed with 6 I-shaped sample grooves with a diameter of 20mm and a length of 100mm, such as Figure 4 shown.

[0079] Prepare 2kg of 304 stainless steel alloy particles with an average particle size of 1-2mm, fill them into the sample groove in the mold, and make the height of the alloy material 20mm lower than the top of the mold, such as Figure 4 shown. The high throughput mold 6 is placed in the inductor 5 of the vacuum chamber 1 .

[0080] Vacuum chamber 1 is evacuated to 1×10 by vacuum pump 2 -6 Pa, and then use the inert gas source 3 to backfill high-purity argon until the pressure of the vacuum chamber 1 is 5×10 4 Pa, repeat this process 5 times. Start the induction power supply, and keep warm for 30 minutes after the metal is completely melted.

[0081] Place the DC electromagnet in the crystallization chamber, start the magnetic field power supply...

Embodiment 2

[0085] A high-throughput mold (120mm in diameter and 200mm in height) for processing graphite materials, in which 19 cylindrical sample slots with a diameter of 10mm are evenly distributed, such as image 3 shown.

[0086] Prepare 5kg of Inconel625 alloy particles with an average particle size of 1-2mm, fill it into the sample groove in the mold, and make the height of the alloy material 20mm lower than the top of the mold, such as image 3 shown. Place the high-throughput mold into the inductor in the vacuum chamber.

[0087]Evacuate the vacuum chamber to 1×10 by vacuum pump -4 Pa, and then use an inert gas source to backfill high-purity argon until the pressure of the vacuum chamber is 8×10 4 Pa, repeat this process 3 times. Start the induction power supply, and keep warm for 10 minutes after the metal is completely melted.

[0088] Place the DC electromagnet in the crystallization chamber, start the magnetic field power supply to generate a DC magnetic field, such as ...

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Abstract

The invention belongs to the technical field of solidification, and particularly relates to a high-throughput preparation method for metal parts. The invention provides the high-throughput preparation method for the metal parts. The high-throughput preparation method for the metal parts comprises the following steps that metal raw materials are put into a high-throughput mold; the metal raw materials in the high-throughput mold are heated and melted in a protective gas atmosphere so as to obtain a metal melt, and then directional crystallization is carried out on the metal melt under a magnetic field condition; and the number of part sample grooves in the high-throughput mold is greater than or equal to 4, and the shape of the part sample grooves is the same as that of the metal parts. According to the preparation method, the metal raw materials are put into the high-throughput mold to be subjected to in-situ melting and directional crystallization, a plurality of metal part products with excellent performance can be prepared through a single experiment, the experimental quantity in the material research and development process is remarkably decreased, and the period in the material research and development process is remarkably shortened.

Description

technical field [0001] The invention belongs to the technical field of solidification, and in particular relates to a high-throughput preparation method of metal parts. Background technique [0002] Directional crystallization is a process for directional growth of crystals in metal or alloy melts. Through directional crystallization, the lateral grain boundaries generated during the crystallization process can be eliminated, and the mechanical properties of metal materials can be improved. In the 1960s, directional crystallization technology greatly improved the high-temperature performance of aeroengine turbine blades, which strongly promoted the development of the aviation industry. [0003] Chinese patent CN2690077Y discloses a directional crystallization molding device, which sets a hollow cooling channel and a heating element in the cavity of the mold to obtain a large temperature gradient to achieve directional solidification. Chinese patent CN109226666B discloses a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D27/04B22D27/15B22D27/02C22C30/00C22C30/02
CPCB22D27/045B22D27/02B22D27/15C22C30/00C22C30/02
Inventor 阮莹李星吾魏炳波
Owner NORTHWESTERN POLYTECHNICAL UNIV
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