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A Method for Eliminating Hole Defects in Aluminum Alloy Castings

A technology for aluminum alloy castings and holes, which is applied in the field of eliminating hole defects in aluminum alloy castings, can solve problems such as the decline in mechanical properties and sealing performance of aluminum alloy castings, the lack of effective process methods to control or eliminate them, and energy waste, etc., to achieve The effect of eliminating hole defects, reducing product scrap rate, and reducing costs

Active Publication Date: 2015-11-25
JIANGSU HONGDE SPECIAL PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process of aluminum alloy castings, especially in the manufacturing process of aluminum alloy castings with holes, a large number of hole defects will be generated near the hole structure, resulting in a significant decline in the performance of aluminum alloy castings, especially the mechanical properties and sealing properties, and even scrapped , leading to low yield, a lot of energy waste, and loss of production
The study of hole defects in aluminum alloys has long been a research hotspot in aluminum alloys, especially aluminum alloys for casting. There is also a method of using chilled iron at the flange holes in the production process, but there has been no effective process to control or eliminate them. Such hole defects

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0022] The described embodiment is for the control of the hole defects of a cast aluminum alloy pressure vessel tank body, and the steps are as follows:

[0023] The first step: making a special cold iron, the shape of the cold iron is designed and manufactured according to the characteristics of the pore structure of the casting;

[0024] Step 2: Prepare varnish, nitro wood varnish is used as varnish, and release with appropriate amount of banana water;

[0025] The third step: use a brush to evenly paint the above-mentioned varnish on the above-mentioned cold iron, and the material of the cold iron is cast iron or cast steel;

[0026] Step 4: Use quartz sand for dry sand, and the quartz sand is 200-300 mesh, and dry naturally for 10-15 minutes. Before the varnish on the cold iron is dry, sprinkle the quartz sand evenly on the cold iron;

[0027] The fifth step: place the above-mentioned cold iron in the sand mold;

[0028] Step 6: pouring the casting when the pouring temp...

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Abstract

The invention provides a method for eliminating aluminum alloy casting pore defects. The method includes firstly, producing special cold iron, and designing and manufacturing the shape of the cold iron according to features of casting pore structures; secondly, configuring nitro wood varnish, and using proper amount of banana oil to dilute; thirdly, using a brush or felt cloth to coat the configured varnish onto the cold iron before core setting, spreading dry sands and drying for 10 to 15 minutes naturally to allow the dry sands to be adhesive to the cold iron before the varnish is dry; fourthly, placing the cold iron into a sand die; and fifthly, casting. The method has the advantages that aluminum alloy casting pore defects can be reduced effectively, and scrap rate is decreased.

Description

technical field [0001] The invention relates to a method for eliminating hole defects in aluminum alloy castings. Background technique [0002] As a structural material, compared with steel, aluminum alloy has the advantages of low density and high specific strength, and its usage in aviation, aerospace, automobile, medical equipment and other fields is increasing day by day. In the production process of aluminum alloy castings, especially in the manufacturing process of aluminum alloy castings with holes, a large number of hole defects will be generated near the hole structure, resulting in a significant decline in the performance of aluminum alloy castings, especially the mechanical properties and sealing properties, and even scrapped , leading to low yield, a lot of energy waste, and loss to production. The study of hole defects in aluminum alloys has long been a research hotspot in aluminum alloys, especially aluminum alloys for casting. There is also a method of using ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D27/04
Inventor 曹培新杨金德刘伟伟赵磊廖恒成陈立新
Owner JIANGSU HONGDE SPECIAL PARTS CO LTD
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