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High strength aluminium alloy and producing process

A production method and aluminum alloy technology, which is applied in the field of high-strength aluminum alloy building profiles and production, can solve the problems of increased linear density of profiles, resource consumption, and inability to be used for high-strength structural parts.

Inactive Publication Date: 2005-04-27
BAIFURUI MATERIAL HUNAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The linear density of profiles increases, which increases the cost burden of users
[0004] (2) Uselessly consume a lot of resources
[0005] (3) Cannot be used for high-strength structural parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] First of all, smelting is carried out, using fuel reverberatory furnace to smelt aluminum ingots, magnesium ingots and master alloys, including 8846kg of aluminum ingots, 174kg of magnesium ingots, 480kg of Al-Si master alloys, 335kg of Al-Cu master alloys, 115kg of Al-Fe master alloys, Al- Mn master alloy 50kg, the composition of the alloy is Mg1.45%, Si 0.96%, Cu 0.67%, Fe 0.45%, Mn0.08% and the balance is Al after the analysis before the furnace; the melting temperature is 730 °C; then use hot top casting equipment Carry out semi-continuous casting, the casting diameter is Φ110mm, the casting speed is 135mm / min, and the cooling water pressure is 0.6MPa; the hot extrusion forming is carried out by a forward extrusion machine, the extrusion force is 1000t, and the extrusion outlet temperature is 540°C; Two-way water curtain is used for online water quenching, the cooling water pressure is 0.6MPa, the cooling water temperature is <35°C, and the cooling rate is 140°C / min;...

Embodiment 2

[0031] Melting aluminum ingots, magnesium ingots and master alloys using oil-fired reverberatory furnaces, including 8769kg of aluminum ingots, 156kg of magnesium ingots, 450kg of Al-Si master alloys, 350kg of Al-Cu master alloys, 100kg of Al-Fe master alloys, and 50kg of Al-Mn master alloys , 50kg of Al-Cr master alloy, 75kg of Al-V master alloy, the melting temperature is 740°C, the alloy composition is Mg1.3%, Si 0.9%, Cu 0.7%, Fe 0.4%, Mn0.08%, Cr 0.1%, V 0.15%, and the balance is Al; hot top casting equipment is used for semi-continuous casting, casting diameter is Φ120mm, casting speed is 120mm / min, cooling water pressure is 0.6MPa; forward extrusion machine is used for hot casting Extrusion forming, the extrusion force is 1600t, the extrusion outlet temperature is 525°C; the tunnel resistance furnace is used for solution heat treatment, the power is 150KW, the heat treatment temperature is 543°C, and the heat treatment time is 2h; the circulating hot air furnace is used ...

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Abstract

The high strength alloy for building section consists of Al in 95.75-96.5 wt% and M in 2.95-3.7, with M being Mg, Si, Cu and Fe. The production process of the alloy includes the following key steps: compounding based on the formulation, smelting, semi-continuous casting, hot extruding to form, on-line water quenching, and artificial ageing. The Al alloy thus produced has tensile and compression strength over 320 MPa, yield strength over 270 MPa, elongation over 10 %, and excellent corrosion resistance, extrusion performance and weldability.

Description

technical field [0001] The invention relates to a high-strength aluminum alloy building profile and a production method, in particular to a high-strength aluminum alloy building profile and a production method used in the construction industry. Background technique [0002] At present, the tensile strength specified by various national standards for aluminum alloy profiles in the construction industry is between 150 and 160 MPa. In order to ensure the strength, the wall thickness of the profiles has to be increased, which has two disadvantages: [0003] (1) The linear density of profiles increases, which increases the cost burden of users. [0004] (2) Uselessly consume a large amount of resources. [0005] (3) It cannot be used for high-strength structural parts. Contents of the invention [0006] The technical problem to be solved by the present invention is to provide a new type of aluminum alloy and corresponding profile plastic forming processing technology, thereby...

Claims

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Application Information

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IPC IPC(8): C22C21/00
Inventor 张辉高崧云熊晟詹自勤
Owner BAIFURUI MATERIAL HUNAN
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