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: 2009-07-08
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 proces

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]Melting: smelting the aluminum ingot, the brand name of the aluminum ingot used is ZL101, purchased from Baotou Aluminum Company, the chemical composition of the aluminum ingot is calculated by mass percentage: Si 6.5-7.5%, Mg 0.20-0.45%, Ti0 .08-0.20%, Fe≤0.20%, Mn≤0.01, Cu≤0.01, Zn≤0.01, and the balance is Al. The bell jars, pouring spoons and slag removal tools used in the smelting process are all pre-painted with zinc oxide paint and dried to obtain molten aluminum.

[0032] Refining: When the temperature of the molten aluminum reaches 710-720°C, use a bell jar to press into the dried additives. The additives are purchased from Shanghai Kaiwan Hardware Processing Factory. For 2-5 minutes, do not remove slag, use a rotary blowing device to feed 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 1.2% of the liquid mass, the...

Embodiment 2

[0036] Melting: smelting the aluminum ingot, the brand name of the aluminum ingot used is ZL101, purchased from Baotou Aluminum Company, the chemical composition of the aluminum ingot is calculated by mass percentage: Si 6.5-7.5%, Mg 0.20-0.45%, Ti0 .08-0.20%, Fe≤0.20%, Mn≤0.01, Cu≤0.01, Zn≤0.01, and the balance is Al. The bell jars, pouring spoons and slag removal tools used in the smelting process are all pre-painted with zinc oxide paint and dried to obtain molten aluminum.

[0037] Refining: When the temperature of the molten aluminum reaches 710-720°C, use a bell jar to press into the dried additives. The additives are purchased from Shanghai Kaiwan Hardware Processing Factory. For 2-5 minutes, do not remove slag, use a rotary blowing device to feed 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 1.0% of the liquid mass, th...

Embodiment 3

[0041] Melting: smelting the aluminum ingot, the brand name of the aluminum ingot used is ZL101, purchased from Baotou Aluminum Company, the chemical composition of the aluminum ingot is calculated by mass percentage: Si 6.5-7.5%, Mg 0.20-0.45%, Ti0 .08-0.20%, Fe≤0.20%, Mn≤0.01, Cu≤0.01, Zn≤0.01, and the balance is Al. The bell jars, pouring spoons and slag removal tools used in the smelting process are all pre-painted with zinc oxide paint and dried to obtain molten aluminum.

[0042] Refining: When the temperature of the molten aluminum reaches 710-720°C, use a bell jar to press into the dried additives. The additives are purchased from Shanghai Kaiwan Hardware Processing Factory. For 2-5 minutes, do not remove slag, use a rotary blowing device to feed 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 1.3% of the liquid mass, th...

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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, in particular to an aluminum alloy casting method. 2. Background technology [0002] During the smelting process of aluminum and its alloys, there are oxide inclusions (Al 2 o 3 ) and hydrogen and other pollutants affect the purity of the melt and cause defects such as bubbles, pores, inclusions, and porosity in the ingot, which directly affect the inherent properties of aluminum and aluminum alloy materials. Therefore, removing gas and inclusions in molten aluminum and improving the purity of molten aluminum are important research topics for the purification of aluminum and aluminum alloy melts. [0003] Large-scale aluminum alloy castings with high requirements are prone to various defects due to the characteristics of large amount of molten aluminum and long solidification time. It is difficult to meet the requirements, and the scrap rate has always been high. Many documents menti...

Claims

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Application Information

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