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Hot top casting process of 7A09 aluminum alloy and aluminum alloy prepared by hot top casting process

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

Inactive Publication Date: 2015-03-25
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 7A09 aluminum alloy ordinary casting ingot is low, only about 80%, which leads to an increase in the overall production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077]Produce 7A09 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.

[0078] Sprinkle 40kg of 2# solvent powder evenly in the melting furnace, and then load 278kg of pure Cu plate, 957kg of Al-Cr master alloy, 974kg of pure Zn ingot, 87kg of Al-Ti master alloy and 14668kg of Al ingot in order from small to large. That is to say, 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 the melt temperature is controlled at ≤770°C. When the melt softens, slumps and flattens, 8...

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Abstract

The invention provides a hot top casting process of a 7A09 aluminum alloy. The hot top casting process comprises the following steps: A) smelting a Cu source, an Mn source, an Mg source, a Cr source, a Zn source, a Ti source, a Be source, a Zr source and an Al source, so as to obtain a smelted material; B) sequentially carrying out online refining, online degassing and online filtering on the smelted material obtained in the step A), so as to obtain an online treatment product; and C) casting the online treatment product obtained in the step B), so as to obtain the 7A09 aluminum alloy, wherein the casting speed is 15-25mm / min; the 7A09 aluminum alloy comprises the following components by mass fraction: 0-2.6% of Cu, 0-0.6% of Mn, 1.1%-3.0% of Mg, 0-0.3% of a Cr element, 4.4-8% of Zn, 0-0.06% of Ti, 0-0.0009% of B, 0-0.25% of Zr and the balance of Al. The invention provides the 7A09 aluminum alloy.

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 7A09 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): C22C1/02C22C21/10B22D11/116
Inventor 姚勇刁文武王剑
Owner SOUTHWEST ALUMINUM GRP
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