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High magnesium aluminum alloy cold draw bar material and preparation method thereof

A high-magnesium aluminum alloy and cold-drawn bar technology, applied in the field of aluminum alloy bars and their manufacturing, can solve the problems of poor plasticity and low tensile strength, and achieve inhibiting grain growth, good surface quality, and preventing crystallites. The effect of world migration

Active Publication Date: 2014-07-02
HEILONGJIANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low tensile strength and poor plasticity of existing magnesium-aluminum alloy rods, and provide high-magnesium-aluminum alloy cold-drawn rods and their manufacturing methods

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  • High magnesium aluminum alloy cold draw bar material and preparation method thereof

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specific Embodiment approach 1

[0018] Specific embodiment 1: In this embodiment, the high-magnesium aluminum alloy cold-drawn bar is composed of Mg: 9.2% to 10.4%, Mn: 0.5% to 0.7%, Ti: 0.05% to 0.10%, Fe: ≤0.3%, Si: ≤0.3%, Zn: ≤0.15%, Cu: ≤0.05%, Ni: ≤0.08%, and the balance is made of smelted raw materials of Al.

[0019] In this embodiment, the total amount of impurities in the high-magnesium aluminum alloy rod is ≤0.15%, and impurities within this range have no effect on the properties of the high-magnesium aluminum alloy cold-drawn rod.

specific Embodiment approach 2

[0020] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the high-magnesium aluminum alloy cold-drawn bar has a mass percentage of Mg: 9.5% to 10.2%, Mn: 0.55% to 0.65%, and Ti: 0.06% to 0.09% %, Fe: 0.1% to 0.25%, Si: 0.1% to 0.25%, Zn: 0.06% to 0.12%, Cu: 0.02% to 0.04%, Ni: 0.04% to 0.07%, and the balance is made of smelted raw materials of Al become.

specific Embodiment approach 3

[0021] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the high-magnesium aluminum alloy cold-drawn bar is composed of Mg: 9.9%, Mn: 0.6%, Ti: 0.08%, Fe: 0.2%, Si: 0.2%, Zn: 0.1%, Cu: 0.04%, Ni: 0.06%, and the balance is made of smelted raw materials of Al.

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Abstract

The invention relates to a high magnesium aluminum alloy cold draw bar material and a preparation method thereof, solving the problems of low tensile strength and poor plasticity of the existing magnesium aluminum alloy bar material. The high magnesium aluminum alloy bar material is prepared from the following smelting materials: 9.2%-10.4% of Mg, 0.5%-0.7% of Mn, 0.05%-0.10% of Ti, less than or equal to 0.3% of Fe, less than or equal to 0.3% of Si, less than or equal to 0.15% of Zn, less than or equal to 0.05% of Cu, less than or equal to 0.08% of Ni, and the balance of Al. The preparation method comprises steps of firstly, smelting the raw materials; secondly, casting into a bar; thirdly, cutting off; fourthly, removing oxide skin; fifthly, homogenizing annealing; sixthly, ingoting and heating up; seventhly, upsetting; eighthly, extruding; ninthly, intermediate annealing; tenthly, cold drawing. The prepared high magnesium aluminum alloy cold draw bar material has the tensile strength of 410-420MPa and the elongation greater than or equal to 12%, thus meeting the requirement of aerospace products.

Description

technical field [0001] The invention relates to an aluminum alloy rod and a manufacturing method thereof. Background technique [0002] Magnesium-aluminum alloy is an alloy that cannot be strengthened by heat treatment. It has medium strength, excellent processability and corrosion resistance, and is widely used in aviation, aerospace, ships and other fields. The tensile strength of magnesium-aluminum alloy increases with the increase of magnesium content, but its corrosion resistance and plasticity decrease. The preparation process of existing high-magnesium aluminum alloy bars with magnesium content ≥ 8% is generally as follows: 1. Preparation of high-magnesium aluminum alloy melt; 2. Casting alloy rods; 3. Cutting of cast rods; 1. Homogenization annealing; 6. Ingot heating; 7. Extrusion; 8. Straightening; Grade 4, the tensile strength of the material is 320MPa-360MPa, the elongation is 5%-8%, the tensile strength is low, and the mechanical properties fluctuate widely. ...

Claims

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Application Information

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IPC IPC(8): C22C21/06C22C21/08C22F1/047
Inventor 文丽华吉泽升宁慧燕刘全义张焕鹏
Owner HEILONGJIANG INST OF TECH
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