Melt stirring type multifunctional anti-gravity casting device and casting method

An anti-gravity casting and stirring technology, which is applied in the fields of melt-stirring multi-functional anti-gravity casting devices and electromagnetic stirring multi-functional anti-gravity casting devices, can solve the problem of long standing time, many preparation procedures, and inability to use multiple Anti-gravity casting method and other issues, to achieve the effect of stabilizing the uniformity of melt composition, reducing gas content, and improving the quality and performance of castings

Inactive Publication Date: 2018-05-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method only uses a constant magnetic field to increase the undercooling of the melt, and does not control the melt with variable magnetic field stirring, so it cannot guarantee the composition uniformity of the metal melt, nor can it be used in the production of various anti-gravity casting methods
[0006] When the existing multi-functional anti-gravity casting device is used for the production of metal matrix composite materials or high-strength aluminum alloy materials, there are many preparation procedures, long standing time of the melt and continuous stirring of the melt to maintain the uniformity of the melt composition. For this reason, the present invention proposes an electromagnetic stirring multifunctional anti-gravity casting device and method, which solves the problem that the melt in a closed space cannot be stirred during anti-gravity casting, and is controlled by alternating electromagnetic fields to strengthen the convective movement inside the melt , maintain the uniformity of the melt composition, and provide qualified melt raw materials for subsequent pouring

Method used

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  • Melt stirring type multifunctional anti-gravity casting device and casting method

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Effect test

Embodiment 1

[0028]Embodiment 1: Put the aluminum-based composite material in the crucible 5, energize and heat the melting furnace 4, cover the middle partition 7, and seal the lower pressure tank 1, and vacuumize the lower pressure tank 1; after the metal material is melted, The variable frequency power supply 14 controls the current magnitude and direction of the side strong magnet 3 and the bottom strong magnet 2, so that an alternating electromagnetic field is generated inside the metal melt, and the melt rotates horizontally and turns up and down under the action of alternating electromagnetic thrust, so that the melt The gas in the body is precipitated under vacuum diffusion and stirring convection, so as to achieve the purpose of vacuum stirring and degassing of the melt. When the melt temperature reaches the pouring temperature, disconnect the vacuum, insert the liquid riser 6, place and fix the mold 13, cover the upper pressure tank 11, and lock the lower pressure tank 1, the uppe...

Embodiment 2

[0029] Embodiment 2: Put the magnesium-based composite material into the crucible 5, heat the melting furnace 4, cover the middle partition 7, and seal the lower pressure tank 1, and vacuumize the lower pressure tank 1; after the metal material is melted, The variable frequency power supply 14 controls the current magnitude and direction of the side strong magnet 3 and the bottom strong magnet 2, so that an alternating electromagnetic field is generated inside the metal melt, and the melt rotates horizontally and turns up and down under the action of alternating electromagnetic thrust, so that the melt The gas in the body is precipitated under vacuum diffusion and stirring convection, so as to achieve the purpose of vacuum stirring and degassing of the melt. When the melt temperature reaches the pouring temperature, disconnect the vacuum, insert the liquid riser 6, place and fix the mold 13, cover the upper pressure tank 11, and lock the lower pressure tank 1, the upper pressur...

Embodiment 3

[0030] Example 3: Put ZL205A alloy material into the crucible 5, and heat the melting furnace 4. After the metal material is melted, the molten metal is degassed by hanging rotary spraying; after the degassing is completed, turn on the frequency conversion power supply 14. The variable frequency power supply 14 controls the current magnitude and direction of the side strong magnet 3 and the bottom strong magnet 2, so that an alternating electromagnetic field is generated inside the metal melt, and the melt rotates horizontally and turns up and down under the action of alternating electromagnetic thrust, To achieve the purpose of strengthening the internal convection of the melt. When the melt temperature reaches the pouring temperature, cover the middle partition 7, insert the riser 6, place and fix the mold 13, and lock and seal the lower pressure tank 1 and the middle partition 7 by the locking ring 8; Under the control of the computer and the air circuit control system 12, ...

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Abstract

The invention relates to a melt stirring type multifunctional anti-gravity casting device and a casting method. The melt stirring type multifunctional anti-gravity casting device comprises a lower pressure tank, a melting furnace, strong magnets, a variable-frequency power source, a middle separation plate, an upper pressure tank and the like. The method comprises the steps that the melting furnace melts metal materials, the lower pressure tank is sealed, the variable-frequency power source applies an alternating magnetic field to melts through the strong magnets, vacuum stirring degassing treatment of the melts is realized, electromagnetic stirring is continuously applied to the melts in the anti-gravity casting preparation process and the pouring process, and casting of different anti-gravity casting methods is completed through a control system. According to the casting device and the casting method, not only can vacuum stirring degassing treatment be conducted during metal materialmelting, but also alternating electromagnetic stirring force can be applied to the melts in the pouring preparation process and during pouring, and the effects of reducing the gas content of the interiors of the melts, stabilizing the uniformity of melt compositions and improving the casting quality and performance are played.

Description

technical field [0001] The invention belongs to the anti-gravity casting technology, and relates to a melt-stirring multifunctional anti-gravity casting device and casting method, which can realize the electromagnetic stirring multi-functional anti-gravity casting device and method for the production of metal matrix composite materials and high-strength aluminum alloy material components . Background technique [0002] Anti-gravity casting technology is a technology that uses external pressure to make the alloy liquid fill and solidify from bottom to top in the direction opposite to gravity. It is currently widely used in industry. Anti-gravity casting can be divided into low-pressure casting according to the pressure method. , Differential pressure casting and pressure regulating casting. During anti-gravity casting, the melt is usually degassed directly in the melting furnace by rotary blowing, or the melt is introduced into the holding furnace after treatment, and then p...

Claims

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Application Information

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IPC IPC(8): B22D18/00C22B9/04B22D1/00
CPCB22D18/00B22D1/007C22B9/04
Inventor 李新雷介万奇
Owner NORTHWESTERN POLYTECHNICAL UNIV
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