7A85 aluminium alloy hot-top casting process and 7A85 aluminium alloy ingot

A technology of hot top casting and aluminum alloy, applied in the field of metal materials, can solve the problem of low pass rate of ingot inspection

Active Publication Date: 2015-03-11
SOUTHWEST ALUMINUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production process of 7A85 aluminum alloy includes smelting, on-line processing and casting, but the pass rate of ingot flaw detection produced by the existing hot top casting process of 7A85 aluminum alloy is low

Method used

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  • 7A85 aluminium alloy hot-top casting process and 7A85 aluminium alloy ingot
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  • 7A85 aluminium alloy hot-top casting process and 7A85 aluminium alloy ingot

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Embodiment 1

[0097] Produce 7A85 aluminum alloy with an ingot length of 4200mm and an ingot specification of Φ850. 4 castings at one time, considering the oxidation loss of 5%, the density of the alloy is 2800kg / m 3 , then calculate the total feeding amount = π × 0.85 2 / 4×4.2×4×(1+5%)×2800≈28400kg.

[0098] Sprinkle 65kg of 2# solvent powder evenly in the melting furnace, and then load 482kg of pure Cu plate, 2156kg of pure Zn ingot, 142kg of Al-Ti master alloy, 851kg of Al-Zr master alloy and 24287kg of Al ingot in order from small to large. The small pieces of material are loaded first, and then the large pieces of material. At the same time, the intermediate alloy with a high melting point is installed in the middle and upper layers, and the metal that is easy to burn is installed in the middle layer. The hearth temperature of the smelting furnace is controlled at ≤1050°C, and the melt temperature is controlled at ≤770°C. When the melt softens, collapses and flattenes, sprinkle 130kg...

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Abstract

The invention provides a 7A85 aluminium alloy hot-top casting process which comprises the following steps: (A) mixing a Cu source, a Mg source, a Zn source, a Zr source and a Al source, and then smelting to obtain a smelted material; (B) sequentially performing on-line degassing, on-line filtering and on-line refining on the smelted material obtained in the step (A) to obtain an on-line processed product; (C) casting the on-line processed product obtained in the step (B) to obtain a 7A85 aluminium alloy, wherein the casting speed is 8-14 mm/min. The 7A85 aluminium alloy hot-top casting process has the advantages that an appropriate casting speed is adopted, so that the nondestructive inspection qualification rate of the aluminium alloy can be improved. Experimental results show that the nondestructive inspection qualification rate of the 7A85 aluminium alloy prepared by adopting the aviation aluminium hot-top casting process is 97-99 percent.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a hot-top casting process of 7A85 aluminum alloy and the 7A85 aluminum alloy. Background technique [0002] Aluminum alloy is an alloy assembly with aluminum as the matrix element. The main alloy elements include copper, silicon, magnesium, zinc, manganese, and nickel, iron, titanium, chromium, lithium and other alloy elements. The density of aluminum alloy is low, but its strength is relatively high, which is close to or exceeds that of high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is used in aviation, aerospace, automobiles, and machinery manufacturing. It is the most widely used non-ferrous metal material in the marine, marine and chemical industries, and its usage is second only to steel. [0003] Aluminum alloys with a yiel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/02B22D7/00
CPCC22C1/026C22C1/06C22C21/10
Inventor 刁文武姚勇王剑
Owner SOUTHWEST ALUMINUM GRP
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