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A kind of preparation method and product of aluminum-lithium alloy based on graphite sand casting mold

An aluminum-lithium alloy and sand casting technology, which is applied in the field of casting, can solve problems such as sand sticking and pores, and achieve the effects of refining grains, preventing sand sticking defects, and high thermal conductivity

Active Publication Date: 2022-12-02
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a graphite sand casting-based aluminum-lithium alloy preparation method and products to solve the problems of sand sticking and pores in the casting process

Method used

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  • A kind of preparation method and product of aluminum-lithium alloy based on graphite sand casting mold
  • A kind of preparation method and product of aluminum-lithium alloy based on graphite sand casting mold
  • A kind of preparation method and product of aluminum-lithium alloy based on graphite sand casting mold

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preparation example Construction

[0028] like figure 1 Shown, a kind of aluminum-lithium alloy preparation method based on graphite sand mold, the method comprises the following steps:

[0029] S1 cleaning graphite sand

[0030] Put the graphite sand into the water, apply mechanical stirring, stop stirring after a period of time, let it stand for a period of time, and pour off the water containing graphite ash in the upper part. Follow the above steps to wash it several times until there is no graphite ash in the water and it becomes clear, then dry it for later use.

[0031] Further, in step S1, the graphite sand is artificial granular graphite sand, the number of mesh is 50-150 mesh, the volume ratio of water and graphite sand in the cleaning process is 1:1, the stirring speed is 300-800rpm, and the stirring time is 0.5~2h.

[0032] Further, in step S1, the graphite sand is cleaned for 3-8 times, and the drying temperature is 50-100°C.

[0033] S2 sand mixing

[0034] First, weigh a certain amount of cl...

Embodiment 1

[0047] (1) Clean graphite sand

[0048] (a) Put 100 mesh artificial granular graphite sand into water, the volume ratio of graphite sand to water is 1:1, then apply mechanical stirring, the stirring speed is 500rpm, stop stirring after stirring for 1h, and pour it out immediately after standing for 10s Water with graphite ash in the upper part.

[0049] (b) Wash 6 times according to the above steps until there is no graphite ash in the water, and dry at 60°C for later use.

[0050] (2) sand mixing

[0051] (a) First take by weighing a certain amount of cleaned graphite sand, resin binder and corresponding curing agent, the binder is furan resin, accounting for 5% of the graphite sand weight, and the curing agent is a curing agent for furan resin, accounting for 5% of the weight of the resin 50% by weight.

[0052] (b) Add the graphite sand into the sand mixer and start stirring. During the stirring process, add the curing agent first, and then add the resin binder after sti...

Embodiment 2

[0061] (1) Clean graphite sand

[0062] (a) Put 100 mesh artificial granular graphite sand into water, the volume ratio of graphite sand to water is 1:1, then apply mechanical stirring, the stirring speed is 500rpm, stop stirring after stirring for 1h, and pour it out immediately after standing for 10s Water with graphite ash in the upper part.

[0063] (b) Wash 6 times according to the above steps until there is no graphite ash in the water, and dry at 60°C for later use.

[0064] (2) sand mixing

[0065] (a) First take by weighing a certain amount of cleaned graphite sand, resin binder and corresponding curing agent, the binder is furan resin, accounting for 4% of the weight of graphite sand, and the curing agent is a curing agent for furan resin, accounting for 4% of the weight of the resin 60% by weight.

[0066] (b) Add the graphite sand into the sand mixer and start stirring. During the stirring process, add the curing agent first, and then add the resin binder after ...

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Abstract

The invention belongs to the technical field related to casting, and discloses a preparation method and product of an aluminum-lithium alloy based on a graphite sand casting mold. The method comprises the following steps: S1 selects graphite sand, a binder and a curing agent to mix, and introduces the obtained mixture into a mold to prepare a mold to obtain a graphite sand mold; S2 inserts the graphite sand mold on the inner surface The hydroxyl inhibitor is coated, and the aluminum-lithium alloy is poured into the graphite sand casting mold to obtain the desired aluminum-lithium alloy product. At the same time, the invention also discloses the product obtained by the above preparation method. In the present invention, by using graphite sand as a refractory material and coating the inhibitor on the surface of the casting mold, it can not only prevent the sand-sticking defect caused by the reaction between the aluminum-lithium alloy and the refractory material, but also eliminate the pore defect caused by the existence of hydroxyl groups in the binder, thereby Significantly improve the quality of aluminum-lithium alloy castings.

Description

technical field [0001] The invention belongs to the technical field related to casting, and more specifically relates to a preparation method and product of an aluminum-lithium alloy based on a graphite sand casting mold. Background technique [0002] Aluminum-lithium alloy has the advantages of light weight, high specific strength, high elastic modulus, etc., and has broad application prospects in aerospace, weaponry and other fields. Sand casting is the most commonly used and most mature technology in the casting process. If sand casting can be used to prepare high-quality aluminum-lithium alloy castings, it will greatly promote the application of casting aluminum-lithium alloys. However, sand casting aluminum-lithium alloys is prone to more serious sand sticking and porosity defects, and the reasons are mainly attributed to two aspects. On the one hand, sand casting refractory materials commonly used at present are quartz sand, bauxite sand, mullite sand, etc., and the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/02B22C3/00B22C1/22B22C9/12
CPCB22C9/02B22C3/00B22C1/224B22C1/2253B22C1/2233B22C9/12
Inventor 蒋文明李广宇樊自田于洋管峰张政
Owner HUAZHONG UNIV OF SCI & TECH
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