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Method for preparing water-soluble salt core through semi-solid pressure casting and using method of water-soluble salt core

A water-soluble salt and semi-solid technology, which is applied to casting molding equipment, cores, molds, etc., to achieve the effects of improving molding efficiency, reducing energy consumption, and avoiding cracks or brittle fractures

Pending Publication Date: 2022-05-31
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the above problems existing in the existing water-soluble salt core preparation process, and to provide a method for preparing water-soluble salt core by semi-solid die-casting. Water-soluble salt core with high strength, toughness and easy water-soluble collapse for foundry

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  • Method for preparing water-soluble salt core through semi-solid pressure casting and using method of water-soluble salt core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] combine figure 1 , a method for preparing a water-soluble salt core by semi-solid die-casting of the present embodiment, comprising the following steps:

[0028] (1) Raw material pretreatment: put sodium chloride, sodium carbonate, 200-mesh quartz sand, and 400-mesh kaolin into an oven for drying, and the temperature of the oven is controlled at 120°C. The sodium chloride and sodium carbonate used to prepare the salt core are mixed according to the mass ratio of 1:2, and then melted for later use. Mix the dried part of sodium chloride and sodium carbonate at a mass ratio of 1:2 and perform ball milling to obtain 10-50 micron inorganic salt powder, which is to be prepared into a semi-solid slurry for later use. Mix dry 200-mesh quartz sand and 400-mesh kaolin at a mass ratio of 1:1, and prepare it when it is melted.

[0029] (2) Melting: Put the mixed inorganic salt in the melting furnace, control the temperature in the furnace to 800°C-850°C, add the quartz sand and k...

Embodiment 2

[0036] A method for preparing a water-soluble salt core by semi-solid die-casting of the present embodiment comprises the following steps:

[0037] (1) Raw material pretreatment: Put potassium chloride, potassium carbonate, 100-mesh mullite sand, and 600-mesh diatomaceous earth into an oven for drying, and the temperature of the oven is controlled at 200°C. The potassium chloride and potassium carbonate used to prepare the salt core are mixed according to the mass ratio of 2:1, and then melted for later use. Mix the dried part of potassium chloride and potassium carbonate at a mass ratio of 2:1 for ball milling to obtain 10-50 micron inorganic salt powder, which is ready to prepare semi-solid slurry for later use. Mix dry mullite sand and diatomaceous earth at a mass ratio of 0.2:1, and prepare them when they are melted.

[0038] (2) Melting: Put the mixed inorganic salt in the melting furnace, control the temperature in the furnace to 900°C-950°C, add the mullite sand and diat...

Embodiment 3

[0045] A method for preparing a water-soluble salt core by semi-solid die-casting of the present embodiment comprises the following steps:

[0046] (1) Raw material pretreatment: Put potassium chloride, potassium carbonate, 200-mesh magnesia, 800-mesh alumina powder, etc. into an oven for drying, and the temperature of the oven is controlled at 170°C. The potassium chloride and potassium carbonate used to prepare the salt core are mixed according to the mass ratio of 1:1, and then melted for later use. Mix the dried part of potassium chloride and potassium carbonate at a mass ratio of 1:1 and perform ball milling to obtain 10-50 micron inorganic salt powder, which is ready to prepare semi-solid slurry for later use. Mix dry magnesia and alumina powder at a mass ratio of 5:1, and prepare them when they are melted.

[0047] (2) Melting: Put the mixed inorganic salt in the melting furnace, control the temperature in the furnace to 920°C-970°C, add the quartz sand and kaolin mixe...

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Abstract

The invention discloses a method for preparing a water-soluble salt core through semi-solid pressure casting and a using method of the water-soluble salt core, and belongs to the technical field of casting. Firstly, inorganic salt and additives are subjected to drying, mixing, ball milling and other pretreatment, then the inorganic salt is molten, semi-solid molten salt slurry is prepared by adding nanoscale inorganic salt powder and controlling temperature and cooling, then high-pressure die casting is carried out, a semi-finished product obtained through high-pressure die casting is slowly cooled and processed, and a casting system is removed; and the molten salt core which is standby or can be directly used is obtained. By adopting the molding process, the molding efficiency of the mold core and the solidification shrinkage of the fused salt can be effectively improved, and the toughness of the mold core is improved.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a process for preparing a water-soluble core by using a high-pressure casting process and a method for using the water-soluble salt core. Background technique [0002] Castings with complex inner cavities and curved channels are widely used in modern industry. When the resin sand core is used to prepare complex inner cavity castings, the organic resin will be cracked under the action of high-temperature molten metal to generate a large amount of gas, which will lead to problems such as pores on the inner wall of the casting and toxic and harmful gases polluting the environment, and in the context of energy saving and consumption reduction Under the low temperature casting of castings, the core collapse performance is not good, and it is very difficult to remove the core of castings with complex inner cavities and curved channels. Therefore, water-soluble cores with e...

Claims

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Application Information

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IPC IPC(8): B22C1/08B22C9/10B22D17/00
CPCB22D17/007B22C9/105B22C1/08
Inventor 张龙杨晓娜
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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