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Aluminum alloy 7A04 and hot-top casting technology thereof

A hot-top casting and aluminum alloy technology, applied in the field of metal materials, can solve the problems of low pass rate of flaw detection and increased production costs

Active Publication Date: 2015-02-25
SOUTHWEST ALUMINUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the pass rate of flaw detection of the existing 7A04 aluminum alloy ordinary casting billet is low, only about 80%, resulting in an increase in the overall production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Production of 7A04 aluminum alloy with an ingot length of 4200mm and an ingot specification of Φ650. 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×0.652 / 4×4.2×4×(1+5%)×2800≈17400kg.

[0080] Sprinkle 40kg of 2# solvent powder evenly in the melting furnace, then 296kg of pure Cu plate, 464kg of Al-Mn master alloy, 653kg of Al-Cr master alloy, 1044kg of pure Zn ingot, 87kg of Al-Ti master alloy and 14457kg of AL ingot according to the order from small to large Furnace loading is carried out according to the sequence, that is, the small pieces of material are loaded first, and then the large pieces of material are loaded. At the same time, the intermediate alloy with 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...

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Abstract

The invention provides a hot-top casting technology of aluminum alloy 7A04. The hot-top casting technology includes A) smelting sources Cu, sources Mn, sources Mg, sources Cr, sources Zn, sources Ti, sources Be, and sources Al to obtain smelting material; B) subjecting the smelting material to on-line degassing, on-line filtering and on-line refining in order to obtain on-line processing material; C) subjecting the on-line processing material to casting at speed of 15-25mm / min to obtain the aluminum alloy 7A04, to be specific, the aluminum alloy 7A04 comprises 1.4-2.0% of Cu, 0.2-0.6% of Mn, 1.8-2.8% of Mg, 0.1-0.25% of Cr, 5.0-7.0% of Zn, 0-0.1% of Ti, 0-0.0009% of Be, and the balance of Al. The invention further provides the aluminum alloy 7A04.

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 7A04 aluminum alloy and the aluminum alloy thereof. 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 y...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/02C22C1/03
CPCB22D11/003C22C1/026C22C21/10
Inventor 姚勇刁文武王剑杜荣
Owner SOUTHWEST ALUMINUM GRP
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