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Low-concentration initial casting casting method and aluminium alloy cast ingot

An aluminum alloy ingot casting, low concentration technology, applied in the field of aluminum alloy smelting and casting, can solve problems affecting ingots, ingot forming cracks, etc., to achieve the effects of avoiding forming cracks, stable performance, and reducing stress

Inactive Publication Date: 2017-08-11
SHANDONG NANSHAN ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above three methods are effective technological measures to reduce the cracking of the ingot, the above-mentioned technological measures will inevitably affect other properties of the ingot, and the occurrence of cracking in the ingot molding cannot be completely avoided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 provides a 7050 aluminum alloy slab, the chemical composition of the 7050 aluminum alloy includes: Si≤0.12%, Fe≤0.15%, Cu 2%-2.6%, Mn≤0.1%, Mg 1.9% in terms of mass percentage ~2.6%, Cr≤0.04%, Zn 5.7%~6.7%, Ti≤0.06%, Zr≤0.09%~0.14%, and the balance is aluminum. The 7050 aluminum alloy flat ingot is made by low-concentration starting casting method, and the specific process is as follows:

[0035] The first batching is carried out according to the chemical composition of the aluminum alloy: Si=0.06wt%, Fe=0.11wt%, Cu=2.1wt%, Mn=0.01wt%, Mg=2.4wt%, Cr=0.01wt%, Zn=6.5 wt%, Ti=0.03wt%, Zr=0.12wt%, the balance is Al, after the normal procedure of smelting, the main cast material is obtained; according to the same elements as the aluminum alloy chemical composition, the second batching is carried out: Si= 0.06wt%, Fe=0.11wt%, Cu=0.63wt%, Mn=0.01wt%, Mg=0.72wt%, Cr=0.01wt%, Zn=1.95wt%, Ti=0.03wt%, Zr=0.12wt% %, the balance is Al (the content of the main elements...

Embodiment 2

[0039] Embodiment 2 provides a 2219 aluminum alloy slab, the chemical composition of the 2219 aluminum alloy includes: Si≤0.2%, Fe≤0.3%, Cu 5.8%-6.8%, Mn=0.2%-0.4%, Mg ≤0.2%, V is 0.05%-0.15%, Zr≤0.1%-0.25%, Zn≤0.1%, Ti is 0.02%-0.10%, and the balance is aluminum. The 2219 aluminum alloy flat ingot is produced by a low-concentration starting casting method, and the specific process is as follows:

[0040] The first batching is carried out according to the chemical composition of the aluminum alloy: Si=0.1wt%, Fe=0.2wt%, Cu=6wt%, Mn=0.3wt%, Mg=0.01wt%, V is 0.1wt%, Zr=0.12wt% %, Zn=0.05wt%, Ti=0.05wt%, the balance is Al, after the normal procedure of smelting, the main cast material is obtained; according to the same elements as the aluminum alloy, the second batching is carried out: Si=0.1wt %, Fe=0.2wt%, Cu=2.1wt%, Mn=0.3wt%, Mg=0.01wt%, V is 0.1wt%, Zr=0.12wt%, Zn=0.05wt%, Ti=0.05wt%, The balance is Al (the content of the main element Cu in the second batching is 35% of th...

Embodiment 3

[0044] Embodiment 3 provides a 2024 aluminum alloy slab. The chemical composition of the 2024 aluminum alloy includes: Si≤0.5%, Fe≤0.5%, Cu 4.1%-4.9%, Mn=0.3%-1%, Mg =1.2% to 1.8%, Cr≤0.1%, Zn≤0.25%, and the balance is aluminum. The 2024 aluminum alloy flat ingot is produced by a low-concentration starting casting method, and the specific process is as follows:

[0045] The first batching is carried out according to the chemical composition of the aluminum alloy: Si=0.3wt%, Fe=0.3wt%, Cu=4.5wt%, Mn=0.6wt%, Mg=1.5wt%, Cr=0.05wt%, Zn=0.2 wt%, the balance is Al, after the normal procedure of smelting, the main casting material is obtained; according to the same elements as the aluminum alloy, the second batching is carried out: Si=0.3wt%, Fe=0.3wt%, Cu=1.8 wt%, Mn=0.6wt%, Mg=1.5wt%, Cr=0.05wt%, Zn=0.2wt%, the balance is Al (the content of the main element Cu is 40% of the Cu content in the first batch, other The trace elements and their content remain unchanged, and the Al cont...

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Abstract

A low-concentration starting casting method and an aluminum alloy ingot, relating to the technical field of aluminum alloy smelting and casting, the method firstly carries out the first batching according to each element and its content in the chemical composition of the aluminum alloy, wherein the content is 1.8wt%~ 8wt% elements are the main elements, and the main casting material is obtained through the normal procedure of smelting; according to the elements with the same chemical composition as the aluminum alloy, the main element content is 30% to 40% of the corresponding element content for the second batching, after smelting According to the normal procedure, the starting material is obtained; then the starting material is used for casting to form the ingot head; and then the main casting material is used to continue casting on the basis of the ingot head. The method can reduce the stress in the casting process, can completely avoid the cracking of the casting ingot, and does not affect the performance of the casting itself; the performance of the prepared aluminum alloy casting ingot is stable and will not crack at all.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy smelting and casting, and in particular to a low-concentration starting casting method and an aluminum alloy ingot. Background technique [0002] Among a large number of existing aluminum alloy materials, 2XXX series aluminum alloys and 7XXX series aluminum alloys have the following common characteristics: ① high strength, high toughness, and high purity of aluminum alloys; ② high chemical composition of main elements of aluminum alloys; ③ There are many and complex eutectic phases with low melting points in aluminum alloys; ④ it has a large crystallization temperature range, the solid-liquid zone has low plasticity, and has a great tendency of hot embrittlement; Ingots with a width of more than 1600mm, or round ingots with a width of more than 600mm, are used for subsequent extrusion and forging to meet the requirements of sufficient processing and deformation of materials. Due to the abo...

Claims

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Application Information

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IPC IPC(8): B22D11/18C22C21/10C22C21/12C22C21/14C22C21/16C22C21/18
CPCB22D11/003B22D11/18C22C21/10C22C21/12C22C21/14C22C21/16C22C21/18
Inventor 吕正风张华孟凡林孙学明陶志民罗杰黄同瑊于芳聂振江辛涛王美春王博
Owner SHANDONG NANSHAN ALUMINUM
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