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6063 aluminium alloy with high strength and elongation coefficient an dproduction thereof

A technology with high elongation and production method, applied in the field of aluminum alloy products and their production, can solve the problems of decreased strength, decreased elongation, and simultaneous improvement of elongation and strength has not been found, and achieves simultaneous improvement of elongation and strength. The effect of mechanical properties

Inactive Publication Date: 2005-07-27
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the same material, the elongation rate decreases when the strength increases; while the elongation rate increases, the strength decreases
So far, no invention has been found that simultaneously increases elongation and strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1, the alloy components and their contents are: magnesium (Mg) 0.9%; silicon (Si) 0.73%; copper (Cu) 0.9%; manganese (Mn) 0.2%; chromium (Cr) 0.1%. The production process is as follows:

[0012] a. Load the furnace according to the above ingredients, and the total amount of ingredients is 15 kg. The smelting furnace adopts SG-15-10 crucible resistance furnace, which is smelted at 800°C until it is melted; the liquid alloy melted in the furnace is stirred, slag-removed, and covered; jet refining is sprayed to the bottom of the melt with high-purity nitrogen and The scouring agent is degassed and refined. The refining agent consumption is 0.15% of the melt, the nitrogen consumption is 2 bottles, and the injection time is controlled at 15 minutes. Use Al-5Ti-1B as the refining agent (addition amount is 0.02% of the total weight of the furnace); component adjustment and sampling; then slag removal and covering, and then stand for heat preservation to obtain liquid...

Embodiment 2

[0014] Example 2, the alloy components and their contents are: magnesium (Mg) 0.8%; silicon (Si) 0.68%; copper (Cu) 0.92%; manganese (Mn) 0.15%; chromium (Cr) 0.1%. According to the above ingredients, the total amount is 20 tons. All the other production processes are the same as in Example 1. The average mechanical performance index of the finished 6063 aluminum alloy product obtained in this example reaches: tensile strength σ b : 289.8MPa, yield strength σ 0.2 : 257.5MPa, elongation δ: 13.0%, also reached the expected mechanical properties.

[0015] In the industrial production test of Examples 1-2, the aluminum ingots used as raw materials are double-zero aluminum (Al99.7), the magnesium ingots are not lower than the second grade, and the alloying elements silicon, copper, and manganese are mixed into the charge in the form of master alloys , For example, silicon is an aluminum-silicon alloy (Al-12.6 Si), copper is an aluminum-copper alloy (Al-50 Cu), manganese is an al...

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PUM

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Abstract

The invention opened a high strength and high extensibility 6063 Al alloy which contain the Cu, Mn, chrome, Fe, Zn, Ti, Al. The process is: a, founding: adding the material to the furnace melting stir ring and skimming coving refining skimming and refining thermal retardation casting ingot. b extruding and heat processing: isotroping air cooling, heating extruding quenching cutting cooling stretching straightening aging treatment product. The process has improved the mechanics of the alloy, also the elongation percentage (60%) and the intensity (40%). The tensile strength has been improved to 280-300 MPa, the elongation percentage is improved to 13%. So it satisfy the windows and the curtain wall's need.

Description

technical field [0001] The invention relates to an aluminum alloy product and a production method thereof. Background technique [0002] 6063 aluminum alloy is a medium-strength heat-treatable aluminum alloy in the aluminum-magnesium-silicon (Al-Mg-Si) alloy, which is widely used in the door and window profiles and curtain wall industries. The mechanical performance index of 6063 aluminum alloy in the national standard (GB / T5237-2000) is (T6 state) tensile strength σ b ≥205MPa, yield strength σ 0.2 ≥180MPa, elongation δ≥8%. In general, different values ​​of the chemical composition of the alloying elements will result in different material properties. For the same material, the elongation rate decreases when the strength increases; while the elongation rate increases, the strength decreases. So far, no invention has been found that increases elongation and strength simultaneously. Contents of the invention [0003] The object of the present invention is to provide an ...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C1/04C22C21/08
Inventor 甘卫平陈铁平杨伏良张卫权李科
Owner CENT SOUTH UNIV
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