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Preparation process of aviation aluminum alloy ingot and aluminum alloy ingot

A technology of aluminum alloy ingot casting and preparation process, which is applied in the field of metal materials and can solve the problems of low pass rate of ingot flaw detection

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

AI Technical Summary

Problems solved by technology

[0005] The production process includes smelting, on-line processing and casting. However, the existing 7A85 aluminum alloy and 7050 aluminum alloy preparation process produces a low pass rate of ingot flaw detection

Method used

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  • Preparation process of aviation aluminum alloy ingot and aluminum alloy ingot
  • Preparation process of aviation aluminum alloy ingot and aluminum alloy ingot
  • Preparation process of aviation aluminum alloy ingot and aluminum alloy ingot

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preparation example Construction

[0041] The invention provides a preparation process of an aluminum alloy casting ingot for aviation, comprising the following steps:

[0042] A) smelting after mixing Cu source, Mg source, Zn source, Ti source, Zr source and Al source to obtain a smelt;

[0043] B) sequentially performing on-line degassing, on-line filtration and on-line refining on the smelt obtained in the step A), to obtain an on-line processing product;

[0044] C) casting the on-line processing product obtained in the step B) to obtain an aluminum alloy ingot for aviation, and the casting speed is 8-14mm / min;

[0045] D) performing homogenization heat treatment on the aviation aluminum alloy ingot obtained in the step C) to obtain the aviation aluminum alloy ingot;

[0046] The aluminum alloy ingots for aviation include 7050 aluminum alloy ingots and 7A85 aluminum alloy ingots.

[0047] The qualified rate of flaw detection of the 7050 aluminum alloy ingot and the 7A85 aluminum alloy ingot obtained by th...

Embodiment 1

[0116] 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.

[0117] 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...

Embodiment 2

[0131] 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.

[0132] Sprinkle 65kg of 2# solvent powder evenly in the melting furnace, and then load 460kg of pure Cu plate, 2059kg of pure Zn ingot, 135kg of Al-Ti master alloy, 812kg of Al-Zr master alloy and 24474kg 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 preparation process of an aviation aluminum alloy ingot. The preparation process of the aviation aluminum alloy ingot comprises the following steps: (A) mixing a Cu source, an Mg source, a Zn source, a Ti source, a Zr source and an Al source, then smelting to obtain a smelted product; (B) sequentially degassing, filtering and refining the smelted product obtained in the step (A) on line to obtain an on-line processed product; (C) casting the on-line processed product obtained in the step (B) to obtain an aviation aluminum alloy ingot blank, wherein the casting rate is 8-14mm / min; (D) carrying out homogenizing treatment on the aviation aluminum alloy ingot blank obtained in the step (C) to obtain the aviation aluminum alloy ingot. According to the preparation process, the proper casting rate is adopted; the flaw detection eligibility rate of the aluminum alloy can be increased; experimental results show that the flaw detection eligibility rate of aluminum alloy 7050 and aluminum alloy 7A85 prepared by the preparation process of the aviation aluminum reaches 97-99%.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a preparation process of an aluminum alloy casting ingot for aviation and the aluminum alloy casting ingot. Background technique [0002] Aluminum alloy is a general term for alloys with aluminum as the matrix element. The main alloying elements include copper, silicon, magnesium, zinc, manganese, and nickel, iron, titanium, chromium, lithium and other alloying 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 ...

Claims

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Application Information

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IPC IPC(8): C22F1/053
CPCC22C21/10C22F1/053
Inventor 刁文武姚勇王剑杜荣
Owner SOUTHWEST ALUMINUM GRP
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