Casting method of aluminum alloy cast rod

A technology for aluminum alloy and aluminum alloy melt, which is applied in the field of metal smelting and can solve the problems of uneven temperature of aluminum alloy melt, different cooling rates and degrees of cooling, and cracks in cast rods.

Active Publication Date: 2021-04-06
佛山市三水凤铝铝业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, in order to solve the problem that the high casting temperature makes the aluminum alloy melt temperature uneven when casting large-diameter aluminum alloy casting rods, resulting in different cooling speeds and cooling degrees at variou

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  • Casting method of aluminum alloy cast rod
  • Casting method of aluminum alloy cast rod
  • Casting method of aluminum alloy cast rod

Examples

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Comparison scheme
Effect test

Example Embodiment

[0050] Example 1:

[0051] A method for casting an aluminum alloy cast rod, comprising the following steps:

[0052] The ingredients are calculated according to the mass percentage of the aluminum alloy cast rod element composition: Zn 0.8%, Mn 1.3%, Fe0.1%, Mg 1.8%, Zr 1.0%, the balance is Al and unavoidable impurities, and unavoidable The total mass percentage of impurities is less than 0.15%, and the mass percentage of individual unavoidable impurities is less than 0.05%.

[0053] Put aluminum ingots and copper ingots in a reverberatory furnace, melt and heat up to 750°C, add zinc ingots, aluminum-manganese alloys, aluminum-iron alloys, aluminum-magnesium alloys, and aluminum-zirconium alloys as intermediate alloy materials. After electromagnetic stirring for 15 minutes, use a purity of 99.999%. For the above refining with nitrogen spraying, the refining agent is Al with an amount of 1kg / t for the first refining for 10 minutes, sampling and analyzing the chemical compositi...

Example Embodiment

[0056] Example 2:

[0057] A method for casting an aluminum alloy cast rod, comprising the following steps:

[0058] The ingredients are calculated according to the mass percentage of the aluminum alloy cast rod element composition: Zn 0.8%, Mn 1.9%, Fe0.5%, Mg 2.4%, Zr 1.8%, the balance is Al and unavoidable impurities, and unavoidable The total mass percentage of impurities is less than 0.15%, and the mass percentage of individual unavoidable impurities is less than 0.05%.

[0059] Put aluminum ingots and copper ingots in a reverberatory furnace, melt and heat up to 800°C, add zinc ingots, aluminum-manganese alloys, aluminum-iron alloys, aluminum-magnesium alloys and aluminum-zirconium alloys as intermediate alloy materials, and after electromagnetic stirring for 15 minutes, use a purity of 99.999% For the above refining with nitrogen powder spraying, the refining agent is Al with an amount of 2kg / t for the first refining for 25 minutes, sampling and analysis of chemical co...

Example Embodiment

[0062] Embodiment 3:

[0063] A method for casting an aluminum alloy cast rod, comprising the following steps:

[0064] According to the mass percentage of the aluminum alloy casting rod element components, the ingredients are: Zn0.5%, Mn1.5%, Fe0.3%, Mg2.0%, Zr1.5%, the balance is Al and unavoidable impurities, and The total mass percentage of unavoidable impurities is less than 0.15%, and the mass percentage of a single unavoidable impurity is less than 0.05%.

[0065] Put aluminum ingots and copper ingots in a reverberatory furnace, melt and heat up to 780°C, add zinc ingots, aluminum-manganese alloys, aluminum-iron alloys, aluminum-magnesium alloys, and aluminum-zirconium alloys as intermediate alloy materials. After electromagnetic stirring for 25 minutes, use a purity of 99.999%. For the above refining with nitrogen spraying, the refining agent is Al with an amount of 1.5kg / t for the first refining for 20 minutes, sampling and analyzing the chemical composition, and fee...

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Abstract

The invention provides a casting method of an aluminum alloy cast rod. Chemical composition elements of the aluminum alloy cast rod and the structure of a crystallizer are optimized so that when the aluminum alloy cast rod is cast, a temperature adjusting device, the stirring speed and the stirring time can be more accurately controlled through a controller, formability of aluminum alloy melt is guaranteed, meanwhile, uniformity of the internal temperature of the aluminum alloy melt can be guaranteed, the situation that an aluminum alloy dendritic crystal arm is broken into dendritic crystal fragments is effectively reduced, nucleation positions are added, more non-uniform nucleation occurs, the grain refining effect is remarkably generated, then the tendency that cracks are generated on the cast rod is reduced, the casting smelting quality is improved, and the yield is increased. The problems that when a large-size and large-diameter aluminum alloy cast rod is cast, the temperature of aluminum alloy melt is not uniform due to the high casting temperature, consequently, the cooling speeds and the cooling degrees of all parts of the cast rod are different, the cracking tendency exists, and cracks are generated in the cast rod are effectively solved.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a method for casting aluminum alloy cast rods. Background technique [0002] When casting large-diameter or some special aluminum alloy casting rods, due to the slow casting speed and high casting temperature required in the process, the molten aluminum usually stays in the launder and mold for a long time. This will easily cause the temperature of the aluminum alloy melt in the crystallizer to be uneven, resulting in different cooling speeds and degrees of cooling in various parts of the cast rod, resulting in a tendency to crack, and eventually cracks will occur inside the cast rod. Moreover, if the aluminum liquid stays for too long, it will also lead to grain growth, resulting in structural defects such as coarse grains, which will affect the overall performance of subsequent products. The common method in the prior art is to improve some process parameters such as casting spee...

Claims

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Application Information

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IPC IPC(8): B22D11/041B22D11/114B22D11/18
CPCB22D11/041B22D11/114B22D11/182
Inventor 刘勇纯蓝嘉昕杨杨
Owner 佛山市三水凤铝铝业有限公司
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