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Production method of 6-sereis alloy ingots

An aluminum alloy ingot, aluminum alloy technology, applied in the field of aluminum alloy, can solve the problems of poor mold smoothness, limited wide application, difficult to achieve good matching of casting temperature and casting cooling water flow casting speed, etc.

Inactive Publication Date: 2015-03-25
SOUTHWEST ALUMINUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Since the internal stress of the 6-series aluminum alloy casting process is very large, if the existing method is used to prepare the 6-series aluminum alloy ingot, it is difficult to achieve a good match in the casting process due to the casting temperature, casting cooling water flow, and casting speed, and the mold itself The smoothness is poor, and the lubrication performance is poor during the casting process, which leads to easy cracking of the bottom and corners of the ingot, which affects the yield of the 6-series aluminum alloy ingot
The experimental results show that according to the existing methods for preparing 6-series aluminum alloy ingots, the forming rate of the ingot is only about 60%, and the yield of finished products is less than 50%. The low yield of 6-series aluminum alloy ingots seriously limits its wide application , therefore, it is necessary to study the preparation method of the new 6-series aluminum alloy ingot

Method used

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preparation example Construction

[0022] The embodiment of the present invention discloses a method for preparing a 6-series aluminum alloy ingot, comprising the following steps:

[0023] A) melting the raw materials of the 6 series aluminum alloy ingot;

[0024] B) importing the smelted melt into a holding furnace, and refining with a mixed gas, the mixed gas being a mixed gas of nitrogen and chlorine;

[0025] C) performing online degassing and online filtering sequentially on the melt obtained in step B);

[0026] D) casting the melt obtained in step C), the casting speed is 43-48mm / min, and the water flow is 35-45m 3 / h·root, the casting temperature is 725°C-735°C, and the 6-series aluminum alloy ingot is obtained.

[0027] This application provides a method for preparing a 6-series aluminum alloy ingot. During the preparation process, the raw materials of the 6-series aluminum alloy are smelted, refined, on-line degassed, on-line filtered and casted, thereby obtaining an aluminum alloy ingot. ingot.

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Embodiment 1

[0034] Ingredients: raw materials include: 0.5wt% of Si, 0.7wt% of Fe, 0.15wt% of Cu, 0.15wt% of Mn, 0.8wt% of Mg, 0.25wt% of Cr, 0.25wt% of Zn and the balance of aluminum;

[0035] Melting: Melting the above raw materials in a melting furnace at a melting temperature of 770°C, flattening, melting and sampling analysis;

[0036] Treatment in the static furnace: transfer the melt in the smelting furnace to the static furnace for refining, use a "T" type refiner in the static furnace, and use N 2 -Cl 2 (N 2 : 88wt%, Cl 2 12%) mixed gas refining, N 2 require H 2 O≤15ppm, O 2 ≤15ppm, Cl 2 require H 2O≤500ppm, the refining time is 15-20 minutes, and the refining temperature is 715°C;

[0037] On-line processing: The refined melt is degassed and filtered on-line in sequence. On-line degassing is degassed by the rotary nozzle method, using Ar gas, the gas flow rate is 2500L / h / rotor, and the gas pressure is 0.35MPa. Through refining in a static furnace and on-line degassing,...

Embodiment 2

[0041] Ingredients: raw materials include: 0.5wt% of Si, 0.5wt% of Fe, 0.1wt% of Cu, 0.03wt% of Mn, 0.35wt% of Mg, 0.03wt% of Cr, 0.1wt% of Zn and the balance of aluminum;

[0042] Melting: Melting the above raw materials in a melting furnace at a melting temperature of 730°C, flattening, melting and sampling analysis;

[0043] Treatment in the static furnace: transfer the melt in the smelting furnace to the static furnace for refining, use a "T" type refiner in the static furnace, and use N 2 -Cl 2 (N 2 : 88wt%, Cl 2 12%) mixed gas refining, N 2 require H 2 O≤15ppm, O 2 ≤15ppm, Cl 2 require H 2 O≤500ppm, the refining time is 15-20 minutes, and the refining temperature is 715°C;

[0044] On-line processing: The refined melt is degassed and filtered on-line in sequence. On-line degassing is degassed by the rotary nozzle method, using Ar gas, the gas flow rate is 2500L / h / rotor, and the gas pressure is 0.35MPa. Through refining in a static furnace and on-line degassing,...

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Abstract

The invention provides a production method of 6-sereis alloy ingots. The production method includes the steps of A, smelting material of the 6-sereis alloy ingots; B, charging melt into a holding furnace, and performing refining with mixed gas which is mixture of nitrogen and chlorine; C, subjecting the melt obtained in the step B to online degassing and online filtering; D, casting the melt obtained in the step C, at the speed of 43 to 48mm / min, under the water flow of 35 to 45m<3> / h per rod, and at the temperature of 725 to 735 DEG C, thereby obtaining the 6-sereis alloy ingots. During the production of the 6-sereis alloy ingots, smelting, refining, online degassing, online filtering and casting are performed in order, the casting temperature, the casting and cooling water flow and the casting speed are set to an optimal ratio, and yield of the 6-sereis alloy ingots is greatly increased.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a method for preparing a 6-series aluminum alloy ingot. Background technique [0002] The 6-series aluminum alloys include Al-Mg-Si, Al-Mg-Si-Cu and the like. Typical grades of 6-series aluminum alloys are 6061, 6011, 6201, 6262, etc., which have medium strength, good plasticity and excellent corrosion resistance, especially no tendency of stress corrosion cracking, excellent weldability, corrosion resistance and cold working It is an alloy with a wide range of uses. According to the performance of the 6 series aluminum alloy, it is more suitable as a frame or other welded aluminum products. [0003] Since the internal stress of the 6-series aluminum alloy casting process is very large, if the existing method is used to prepare the 6-series aluminum alloy ingot, it is difficult to achieve a good match in the casting process due to the casting temperature, casting coolin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D21/04
CPCB22D21/04
Inventor 廖知坚林红陈瑜孙自鹏
Owner SOUTHWEST ALUMINUM GRP