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Method for casting aluminium alloy

A technology of aluminum alloy and molten aluminum, applied in the field of aluminum alloy casting, can solve problems such as failure to meet requirements

Active Publication Date: 2010-11-03
JIANGSU HONGDE SPECIAL PARTS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The casting process of high-demand large aluminum castings is rarely mentioned, and even the processes mentioned in a few articles cannot meet the requirements in the actual production of the factory

Method used

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  • Method for casting aluminium alloy
  • Method for casting aluminium alloy
  • Method for casting aluminium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Smelting: Smelting aluminum ingots, the used aluminum ingots are ZL101, purchased from Baotou Aluminum Company. .08-0.20%, Fe≤0.20%, Mn≤0.01, Cu≤0.01, Zn≤0.01, and the balance is Al. The bell jar, the pouring spoon and the slag scraping tool used in the smelting process are all pre-painted with zinc oxide paint and dried, and the molten aluminum is obtained by smelting.

[0032] Refining: When the temperature of the molten aluminum reaches 710-720 ℃, use a bell jar to press in the dried additives. The additives are purchased from Shanghai Kaiwan Hardware Processing Factory. The product name is WL-1 aluminum alloy pollution-free refining and metamorphic covering agent. 2-5 minutes, do not slag slag, use a rotary blowing device to introduce dry nitrogen, and refine for 15-20 minutes. During the refining process, control the temperature of the molten aluminum at 710-720 ° C to obtain an aluminum melt; the amount of the above additives is aluminum. 1.2% of the liquid mass, ...

Embodiment 2

[0036] Smelting: Smelting aluminum ingots, the used aluminum ingots are ZL101, purchased from Baotou Aluminum Company. .08-0.20%, Fe≤0.20%, Mn≤0.01, Cu≤0.01, Zn≤0.01, and the balance is Al. The bell jar, the pouring spoon and the slag scraping tool used in the smelting process are all pre-painted with zinc oxide paint and dried, and the molten aluminum is obtained by smelting.

[0037] Refining: When the temperature of the molten aluminum reaches 710-720 ℃, use a bell jar to press in the dried additives. The additives are purchased from Shanghai Kaiwan Hardware Processing Factory. The product name is WL-1 aluminum alloy pollution-free refining and metamorphic covering agent. 2-5 minutes, do not slag slag, use a rotary blowing device to introduce dry nitrogen, and refine for 15-20 minutes. During the refining process, control the temperature of the molten aluminum at 710-720 ° C to obtain an aluminum melt; the amount of the above additives is aluminum. 1.0% of the liquid mass,...

Embodiment 3

[0041] Smelting: Smelting aluminum ingots, the used aluminum ingots are ZL101, purchased from Baotou Aluminum Company. .08-0.20%, Fe≤0.20%, Mn≤0.01, Cu≤0.01, Zn≤0.01, and the balance is Al. The bell jar, the pouring spoon and the slag scraping tool used in the smelting process are all pre-painted with zinc oxide paint and dried, and the molten aluminum is obtained by smelting.

[0042] Refining: When the temperature of the molten aluminum reaches 710-720 ℃, use a bell jar to press in the dried additives. The additives are purchased from Shanghai Kaiwan Hardware Processing Factory. The product name is WL-1 aluminum alloy pollution-free refining and metamorphic covering agent. 2-5 minutes, do not slag slag, use a rotary blowing device to introduce dry nitrogen, and refine for 15-20 minutes. During the refining process, control the temperature of the molten aluminum at 710-720 ° C to obtain an aluminum melt; the amount of the above additives is aluminum. 1.3% of the liquid mass,...

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Abstract

The invention provides a casting method of aluminum alloys. The method comprises four steps of smelting, refining, moulding and pouring. The casting method is characterized by adding specific additive in the casting process and strictly controlling standing time and casting temperature after refining of aluminum pad to enhance purity of aluminum melt and product quality of the aluminum alloys. The tensile strength, pinhole and the like of the castings which are made by the method are obviously enhanced, and defective index of large aluminum alloy castings made by the method is obviously reduced, and the method is applicable to casting of large aluminum castings with high requirements.

Description

1. Technical field [0001] The invention belongs to the field of metal casting technology, and particularly relates to an aluminum alloy casting method. 2. Background technology [0002] In the smelting process of aluminum and its alloys, there are oxide inclusions (Al 2 O 3 ) and hydrogen and other pollutants, which affect the purity of the melt, resulting in defects such as bubbles, pores, inclusions, and looseness in the ingot, which directly affect the inherent properties of aluminum and aluminum alloy materials. Therefore, removing the gas and inclusions in the molten aluminum and improving the purity of the aluminum melt is an important research topic in the purification treatment of aluminum and aluminum alloy melts. [0003] Large-scale aluminum alloy castings with high requirements are prone to various defects due to the large amount of molten aluminum cast and the long solidification time. It is difficult to meet the requirements, and the scrap rate has always bee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D21/04B22D1/00B22C3/00C22C1/02B22C9/12C22C21/02C22C1/06
Inventor 杨金德潘冶徐亮
Owner JIANGSU HONGDE SPECIAL PARTS CO LTD
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