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Preparation technology of Al-Mg-Si-Cu alloy bar

A preparation process and technology for alloy bars, which are applied in the field of preparation technology of Al-Mg-Si-Cu alloy bars, can solve the problems of rough surface, insufficient strength or elongation, prone to cracking, etc., and achieve strength and elongation. Good comprehensive performance, improve precipitation power, and improve the effect of alloy strength

Active Publication Date: 2018-02-23
GUANGDONG HOSHION IND ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the above-mentioned typical aluminum alloy rods on the market are used for large deformation and CNC processing, due to insufficient strength or elongation, cracks and rough surfaces are prone to occur during processing.

Method used

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  • Preparation technology of Al-Mg-Si-Cu alloy bar
  • Preparation technology of Al-Mg-Si-Cu alloy bar
  • Preparation technology of Al-Mg-Si-Cu alloy bar

Examples

Experimental program
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Embodiment 1-4

[0046] Put the purchased aluminum ingots (Al99.7), magnesium ingots (Mg9990), zinc ingots (Zn99.95), alloy additives (AlSi12, AlCr3, AlCu40 master alloys) into the regenerative flame reflection energy-saving furnace in proportion. Heating and smelting, using natural gas as fuel to obtain aluminum melt; refining the aluminum melt with refining agent (PROMAGRI granular refining agent) and refining gas (high-purity argon), exhaust, slag removal, degassing, filtration, semi-continuous After Shuiling casting, Al-Mg-Si-Cu alloy ingots are obtained.

[0047] The above-mentioned alloy ingot is prepared to obtain the alloy rod, and the process is as follows:

[0048] (1) Homogenization treatment, also known as homogenization treatment: after heating and heat preservation for an appropriate time, then forcefully cool to room temperature with water mist to obtain alloy cast rods;

[0049] (2) sawing: sawing the cast alloy bar obtained after the above-mentioned homogenization treatment i...

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Abstract

The invention provides a preparation technology of an Al-Mg-Si-Cu alloy bar. The preparation technology comprises the following steps of homogenization treatment, saw cutting, three-stage heating, thermal stripping, extrusion, quenching, stretcher straightening, cold-drawing treatment and artificial aging treatment. By reasonably controlling the technological steps and setting parameters, the Al-Mg-Si-Cu alloy bar with both the high tensile strength and the high elongation is prepared. According to the bar, the tensile strength is greater than 310 MPa, and the elongation is greater than 18%. The bar has quite excellent flanging and CNC machining performance, and the typical problems that that 6061-T6 aluminum alloy is insufficient in mechanical performance such as the tensile strength andthe extension strength, and consequentially, fracturing, rough surfaces and the like in the machining process are prone to being caused are solved.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials and their manufacture, and in particular relates to a preparation process of Al-Mg-Si-Cu alloy rods. Background technique [0002] Al-Mg-Si-Cu alloy rods are currently one of the most widely used aluminum alloy materials, accounting for more than 20% of the total aluminum application. Manufacture of rivets is one of the application fields of Al-Mg-Si-Cu alloy. Its manufacturing process includes a large number of machining processes such as flanging, forging, and continuous processing of CNC lathes. The performance requirements such as rate are strict. According to the requirements of the national standard GB / T6892 general industrial aluminum and aluminum alloy extrusion profiles, when the typical aluminum alloy bars on the market achieve high strength and good cutting performance, their elongation will be correspondingly low. If the above-mentioned typical aluminum alloy rods on the marke...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/06C22F1/047
CPCC22C1/06C22C21/08C22F1/047
Inventor 丁小理李建湘宋海海
Owner GUANGDONG HOSHION IND ALUMINUM CO LTD