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Lanthanum-containing 6063 aluminum alloy and preparation method

A technology of aluminum alloy and aluminum alloy melt, applied in the field of alloys, can solve the problems of difficulty in mechanical properties such as tensile strength and elongation, and it is difficult to determine the optimal combination of 6063 aluminum alloy with the improvement direction of 6063 aluminum alloy, so as to improve extrusion Processability and effects of tensile strength and elongation, enhanced tissue toughness, high tensile strength and elongation

Active Publication Date: 2019-07-23
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the development and construction needs of modern sea view houses, skyscrapers, ship structures and offshore engineering, 6063 aluminum alloys currently on the market are difficult to meet the structural rigidity requirements for wind pressure impact resistance, and withstand building lamination and shear force damage. It is difficult for those skilled in the art to determine the optimal combination of 6063 aluminum alloy and the improvement direction of 6063 aluminum alloy, and it is difficult to improve the mechanical properties of 6063 aluminum alloy such as tensile strength and elongation under the condition of ensuring extrusion processing performance.

Method used

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preparation example Construction

[0033] The present invention also provides a preparation method for the lanthanum-containing 6063 aluminum alloy described in the above technical solution, comprising the following steps:

[0034] (1) Provide primary aluminum alloy melt;

[0035] (2) Add Al-Ti-C-La master alloy to the primary aluminum alloy melt in the step (1), carry out metamorphic reaction, obtain metamorphic alloy material liquid, then carry out casting and homogenization treatment successively, obtain containing Lanthanum 6063 aluminum alloy;

[0036] The temperature of the modification reaction is 720-740° C., and the time is 5-10 minutes.

[0037]The invention provides a primary aluminum alloy melt; preferably, a raw material alloy containing silicon, magnesium and aluminum is melted to obtain an original aluminum alloy melt. In the present invention, the melting temperature is preferably 740-780°C, more preferably 740-770°C, even more preferably 740-760°C. The present invention has no special limita...

Embodiment 1

[0048] Based on 100% mass content, industrial pure aluminum, industrial magnesium ingot, and aluminum-silicon alloy are used as the original charge, according to Si: 0.46%, Mg: 0.52%, Fe: 0.15%, Cu: 0.02%, Mn: 0.03%, Zn : 0.03%, the balance is Al, and put it into the furnace to melt at 740°C, stir for 5 minutes, add 0.5wt.% hexachloroethane after removing slag, carry out refining at 715°C for 8 minutes, and then refine at 715°C Let stand for 5min.

[0049] After standing still, when the furnace temperature drops to 720°C, add 0.2% Al-5Ti-0.62C-1La master alloy of the mass of the primary aluminum alloy melt, and keep it at 730°C for 5 minutes, and filter the alloy liquid Cast into aluminum rods, raise the temperature to 510-520°C at a rate of 15°C / min, and keep the temperature at this temperature for 12 hours to homogenize the aluminum rods to obtain lanthanum-containing 6063 aluminum alloy.

Embodiment 2

[0051] Based on 100% mass content, industrial pure aluminum, industrial magnesium ingot, and aluminum-silicon alloy are used as the original charge, according to Si: 0.5%, Mg: 0.54%, Fe: 0.17%, Cu: 0.042%, Mn: 0.01%, Zn : 0.02%, the balance is Al, and put it into the furnace to melt at 750°C, stir for 5 minutes, add 0.5wt.% hexachloroethane after slag removal, refine at 715°C for 8 minutes, and then refine at 715°C Let stand for 5min.

[0052] After standing still, when the furnace temperature drops to 720°C, add 0.5% Al-5Ti-0.62C-1La master alloy of the mass of the primary aluminum alloy melt, and keep it at 730°C for 5 minutes, and filter the alloy liquid Cast into an aluminum rod, raise the temperature to 510-520°C at a rate of 15°C / min, and keep it at this temperature for 12 hours to homogenize the aluminum rod to obtain lanthanum-containing 6063 aluminum alloy.

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Abstract

The invention belongs to the technical field of alloys, and particularly relates to a lanthanum-containing 6063 aluminum alloy and a preparation method thereof. The lanthanum-containing 6063 aluminumalloy provided by the invention is prepared from the following components in percentage by mass: 0.45 to 0.54 percent of Si, 0.52 to 0.56 percent of Mg, less than or equal to 0.35 percent of Fe, lessthan or equal to 0.05 percent of Cu, less than or equal to 0.07 percent of Mn, less than or equal to 0.05 percent of Zn, 0.01 to 0.05 percent of Ti, 0.005 to 0.02 percent of La, 0.001 to 0.006 percentof C and the balance of Al. According to the lanthanum-containing 6063 aluminum alloy and the preparation method thereof, specific small content ranges of the elements, such as Mg and Si, are determined; and the strength of the lanthanum-containing 6063 aluminum alloy is improved through common precipitation of carbides and intermetallic compounds. Embodiment results show that the lanthanum-containing 6063 aluminum alloy provided by the invention achieves the tensile strength of 177 MPa and the elongation of 23.8 percent at room temperature.

Description

technical field [0001] The invention belongs to the field of alloy technology, in particular to a 6063 aluminum alloy containing lanthanum and a preparation method thereof. Background technique [0002] The main alloying elements of 6063 aluminum alloy are magnesium and silicon, which has excellent processing performance, excellent weldability, extrudability and electroplating property, good corrosion resistance, toughness, and easy polishing, color film, anodic oxidation The many advantages of excellent effect are typical extrusion alloys. 6063 aluminum alloy profiles are widely used in building doors and windows, decorative curtain walls and industrial structures due to their good plasticity, moderate heat treatment strength, good welding performance and gorgeous surface color after anodizing treatment. [0003] However, in the development and construction needs of modern sea view houses, skyscrapers, ship structures and offshore engineering, 6063 aluminum alloys currentl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C21/08C22C1/03
CPCC22C1/026C22C1/03C22C21/04C22C21/08
Inventor 丁万武赵小燕张海霞赵文军唐兴昌张志坚李建胜赵哲臣
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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