Radial functional gradient composite material casting device and method

A composite material and functional gradient technology, which is applied in the field of metal matrix gradient composite material preparation, can solve the problems of broken gradient composite material continuity, insufficient precipitation of self-generated reinforcement phase, discontinuous preparation process, etc., and achieve structure/function designability Strong, simple casting equipment, gradient controllable effect

Active Publication Date: 2020-11-24
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) When using a high-frequency magnetic field to prepare in situ self-generated metal matrix functionally graded composites, since the formation and migration of the reinforcing phase and the solidification of the composite material are all carried out in the same mold at the same time, on the one hand, the cooling in the mold Inhomogeneity can easily lead to insufficient precipitation of the self-generated reinforcement phase or uneven size; on the other hand, the effect of electromagnetic induction heating cannot be avoided when controlling the migration of the reinforcement phase, which can easily lead to the melting of the solidified composite material and destroy the continuity of the gradient composite material
[0006] (2) Traditional formwork casting technology is used to prepare metal-based functionally graded composite materials by the existing electromagnetic separation method. During the preparation process, alloy melting, pouring, composite material preparation and other processes need to be carried out separately. The preparation process is long and only one-piece preparation can be realized. , the preparation process is discontinuous and the efficiency is low

Method used

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  • Radial functional gradient composite material casting device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Al with a diameter of 20mm 2 o 3 Preparation of particle-reinforced Al-based gradient composite rods. Plus Al 2 o 3 The Al metal melt 1 with a volume fraction of ceramic particles of 20% flows into the electromagnetic separation channel 6 from the smelting crucible 2 filled with argon protection; the frequency of the electromagnetic induction coil 4 is 2kHz, and the power is adjusted to control the metal in the electromagnetic separation channel 6. The temperature of the melt mixture makes the temperature of the metal melt mixture 3 at the exit of the electromagnetic separation channel 6 be 700°C; the temperature of the cooling water in the mold 7 is 18°C, and the flow rate is 1000L / h; The temperature is 18°C, the flow rate is 500L / h, for Al 2 o 3 The particle-reinforced Al-based gradient composite material is subjected to forced cooling; the traction mechanism 10 performs continuous drawing at a drawing speed of 30 mm / min to obtain Al 2 o 3 Particle-reinforced A...

Embodiment 2

[0048] Si / Mg with a width of 30mm and a thickness of 10mm 2 Preparation of Si particle-reinforced Al-based gradient composite tapes. The Al-18Si-7Mg alloy melt 1 flows into the electromagnetic separation flow channel 6 from the melting crucible 2 filled with argon protection; the frequency of the electromagnetic induction coil 4 is 2.5kHz, and the power is adjusted to control the mixing of the metal melt in the electromagnetic separation flow channel 6 The temperature of the body makes the temperature of the metal melt mixture 3 at the outlet of the electromagnetic separation channel 6 be 620°C; the temperature of the cooling water in the mold 7 is 18°C, the flow rate is 1000L / h, and the temperature of the cooling water in the cooling device 8 is 18°C. ℃, flow rate is 500L / h, for Si / Mg 2 The Si particle reinforced Al-based gradient composite material is subjected to forced cooling; the traction mechanism 10 performs continuous drawing at a casting speed of 50 mm / min to obtain...

Embodiment 3

[0050] TiC particles reinforced Cu-based gradient composite tapes with a width of 20 mm and a thickness of 5 mm were prepared. Add TiO 2 , Cu melt 1 of C flows into the electromagnetic separation channel 6 from the smelting crucible 2 filled with argon protection; the frequency of the electromagnetic induction coil 4 is 1.5kHz, and the power is adjusted to control the temperature of the metal melt mixture in the electromagnetic separation channel 6 temperature, so that the temperature of the molten metal mixture 3 at the outlet of the electromagnetic separation channel 6 is 1100°C; the temperature of the cooling water in the mold 7 is 18°C, and the flow rate is 1000L / h; the temperature of the cooling water in the cooling device 8 is 18°C, The flow rate was 500 L / h, and the TiC particle-reinforced Cu-based gradient composite strip was forcibly cooled; the traction mechanism 10 was continuously drawn at a drawing speed of 30 mm / min to obtain the TiC particle-reinforced Cu-based ...

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Abstract

The invention relates to a radial functional gradient composite material casting device and method, and belongs to the field of metal-based gradient composite material preparation. The casting deviceis composed of a smelting crucible, an electromagnetic induction coil, an electromagnetic separation runner, a casting mold, a cooling device and a traction mechanism. The device is simple in structure, convenient to operate and maintain and wide in application range, structural / functional adjustable functional gradient composite materials can be industrially produced in batches, the content of awild phase is increased in a gradient manner from the center to the surface in the radial direction, the size is uniform, distribution is continuous, the gradient is controllable, and the matching degree with a base body is high. The preparation method is short in technological process, high in production efficiency and high in material structure / function designability.

Description

technical field [0001] The invention belongs to the field of metal-based gradient composite material preparation, and in particular relates to a radial functional gradient composite material casting equipment and method. [0002] technical background [0003] Functionally graded composite material is a new type of heterogeneous composite material whose function gradually changes with the change of structure by selecting materials with different functions and continuously changing the composition and structure of the material by using a special preparation method. As the most widely used functionally graded composite material at present, ceramic / metal functionally graded composite materials not only have the characteristics of high hardness, corrosion resistance and high temperature resistance of ceramics, but also have the excellent electrical and thermal conductivity of metals, as well as high strength and good toughness. And other characteristics, improving the traditional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/14B22D11/115
CPCB22D11/14B22D11/115
Inventor 杨耀华刘雪峰李昂
Owner UNIV OF SCI & TECH BEIJING
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