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Pore-free aluminum alloy casting process

A casting process and aluminum alloy technology, applied in the field of casting, can solve the problems of difficult to obtain high-density castings, mixed gas, formability (poor casting performance, etc.), and achieve the effect of improving formability, reducing resistance and improving porosity

Active Publication Date: 2021-02-26
TIANHEXING METAL & PLASTIC SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current aluminum alloy castings will inevitably be mixed with gas during casting, resulting in unavoidable casting defects such as pores, shrinkage cavities and shrinkage porosity during molding, and it is difficult to obtain high-density castings, so the formability (casting performance) is poor.

Method used

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  • Pore-free aluminum alloy casting process
  • Pore-free aluminum alloy casting process
  • Pore-free aluminum alloy casting process

Examples

Experimental program
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Effect test

Embodiment 1

[0044]SeeFigure 1-2, A casting process of non-porous aluminum alloy, including the following steps:

[0045]S1. Take the aluminum alloy material and put it into the melting furnace for smelting. The melting temperature of the aluminum alloy material is 800°C to obtain the aluminum alloy melt;

[0046]S2. The casting mold is made in advance, and the mold is preheated to 400°C, and the aluminum alloy melt is poured. The casting temperature of the aluminum alloy melt is 700°C;

[0047]S3. Apply a magnetic field above the casting mold to force the composite degassing disc 1 in the casting mold to move upward, and to degas the aluminum alloy melt, and combine it with the holding groove reserved on the casting mold after completion;

[0048]S4. Supplement a proper amount of aluminum alloy melt and pressurize it to 0.08MPa until the aluminum alloy melt fills the casting mold cavity, then adjust the pressure to 0.06MPa to hold the pressure, and the pressure hold time is 200s to obtain a crude product;

[...

Embodiment 2

[0059]A casting process of non-porous aluminum alloy includes the following steps:

[0060]S1. Take the aluminum alloy material and put it into the melting furnace for smelting. The melting temperature of the aluminum alloy material is 900°C to obtain the aluminum alloy melt;

[0061]S2. The casting mold is made in advance, and the mold is preheated to 450°C, and the aluminum alloy melt is poured. The casting temperature of the aluminum alloy melt is 710°C;

[0062]S3. Apply a magnetic field above the casting mold to force the composite degassing disc 1 in the casting mold to move upward, and to degas the aluminum alloy melt, and combine it with the holding groove reserved on the casting mold after completion;

[0063]S4. Supplement appropriate amount of aluminum alloy melt and pressurize it to 0.09MPa until the aluminum alloy melt fills the casting mold cavity, and then adjust the pressure to 0.065MPa to hold the pressure. The pressure hold time is 250s to obtain a crude product;

[0064]S5. Open...

Embodiment 3

[0068]A casting process of non-porous aluminum alloy includes the following steps:

[0069]S1. Take the aluminum alloy material and put it into the melting furnace for melting, and the melting temperature of the aluminum alloy material is 950°C to obtain the aluminum alloy melt;

[0070]S2. The casting mold is made in advance, and the mold is preheated to 500°C, and the aluminum alloy melt is poured. The casting temperature of the aluminum alloy melt is 720°C;

[0071]S3. Apply a magnetic field above the casting mold to force the composite degassing plate 1 in the casting mold to move upwards, and degas the aluminum alloy melt, which is combined with the holding groove reserved on the casting mold after completion;

[0072]S4. Supplement an appropriate amount of aluminum alloy melt and pressurize it to 0.1MPa until the aluminum alloy melt fills the casting mold cavity, then adjust the pressure to 0.07MPa to hold the pressure, and the pressure hold time is 300s to obtain a crude product;

[0073]S5...

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Abstract

The invention discloses a pore-free aluminum alloy casting process, and belongs to the technical field of casting. According to the pore-free aluminum alloy casting process provided by the invention,the deformation expansion actions of composite degassing discs can be triggered by utilizing heat after an aluminum alloy melt is poured in a mode of presetting a plurality of composite degassing discs and containing grooves through a casting mold; a magnetic field is applied above the casting mold, so that the composite degassing discs in the casting mold are forced to move upwards; bubbles existing in the aluminum alloy melt are broken in the moving process, so that gas is forced to escape upwards along with the upward movement of the composite degassing discs and is finally exhausted through gas flow channels communicating with the containing grooves; and the composite degassing discs automatically restore to the initial shapes after exhausting is finished, and the composite degassing discs and the containing grooves reserved on the casting mold are combined to jointly form a cavity, so that forming of an aluminum alloy is not interfered, the casting defects such as air holes, shrinkage cavities and shrinkage porosity can be obviously overcome, a high-density casting is obtained, and the forming performance is greatly improved.

Description

Technical field[0001]The present invention relates to the field of casting technology, and more specifically, to a casting process of a non-porous aluminum alloy.Background technique[0002]Casting is a kind of metal thermal processing technology that mankind has mastered relatively early, and it has a history of about 6000 years. China has entered the heyday of bronze castings between 1700 and 1000 BC, and the craftsmanship has reached a very high level. Casting is a method of pouring liquid metal into a casting cavity suitable for the shape of the part, and after it is cooled and solidified, the part or blank is obtained. The cast material is mostly a metal that is originally solid but heated to a liquid state (for example: copper, iron, aluminum, tin, lead, etc.), and the material of the mold can be sand, metal or even ceramics. According to different requirements, the method used will be different.[0003]As a traditional metal material, cast aluminum alloy is widely used in aviatio...

Claims

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Application Information

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IPC IPC(8): B22D27/02B22D27/09B22D27/20C22C21/02C22F1/043
CPCB22D27/02B22D27/09B22D27/20C22C21/02C22F1/002C22F1/043
Inventor 韦登发
Owner TIANHEXING METAL & PLASTIC SHENZHEN CO LTD
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