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A kind of yttrium-containing 6063 aluminum alloy and its preparation method

A technology of aluminum alloy and aluminum alloy melt, applied in the field of alloys, can solve the problems of difficulty in determining the optimal combination of 6063 aluminum alloy with the improvement direction of 6063 aluminum alloy, mechanical properties such as tensile strength and elongation, etc.

Active Publication Date: 2020-03-06
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

[0031] The present invention also provides a method for preparing the yttrium-containing 6063 aluminum alloy described in the above technical solution, comprising the following steps:

[0032] adding an Al-Ti-B master alloy and an Al-Y master alloy to the primary aluminum alloy melt, performing a modification reaction to obtain a modified alloy liquid, and then performing casting, homogenization and heat treatment in sequence to obtain an yttrium-containing 6063 aluminum alloy;

[0033] The temperature of the modification reaction is 720-740° C., and the time is 5-10 minutes.

[0034]The invention provides a primary aluminum alloy melt; the primary aluminum alloy melt preferably melts a raw material alloy containing aluminum, magnesium and silicon 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.

[0035] After the original aluminum alloy melt is obta...

Embodiment 1

[0046] Based on 100% mass content, industrial pure aluminum, industrial magnesium ingots, and aluminum-silicon alloys are used as the original charge, according to Si: 0.47%, Mg: 0.55%, Fe: 0.35%, Cu: 0.05%, Mn: 0.07%, Zn : 0.05%, 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 9 minutes, and then refine at 715°C Let stand for 5min.

[0047] After standing still, when the furnace temperature drops to 720°C, based on the mass of the primary aluminum alloy melt as 100%, add 0.2wt.% Al-5Ti-1B master alloy and 1wt.% Al-20Y master alloy, And keep it at 730°C for 5 minutes, after filtering, cast the alloy liquid into aluminum rods, raise the temperature to 565-575°C at a rate of 15°C / min, and keep it at this temperature for 3.5 hours to homogenize the aluminum rods. Then keep warm at 520-525°C for 11 hours, then water-cool, and then keep warm at 200-210°C for 2 hou...

Embodiment 2

[0049] Based on 100% mass content, industrial pure aluminum, industrial magnesium ingot, and aluminum-silicon alloy are used as the original charge, according to Si: 0.54%, Mg: 0.55%, Fe: 0.25%, Cu: 0.04%, Mn: 0.05%, Zn : 0.03%, the balance is Al, and put it into the furnace to melt at 750°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.

[0050] After standing still, when the furnace temperature drops to 720°C, based on the mass of yttrium-containing aluminum alloy as 100%, add 0.2wt.% Al-5Ti-1B master alloy and 0.7wt.% Al-20Y master alloy, And keep it at 730°C for 8 minutes, after filtering, cast the alloy solution into an aluminum rod, raise the temperature to 565-575°C at a rate of 15°C / min, and keep it at this temperature for 4 hours to homogenize the aluminum rod. Then keep warm at 520-525°C for 11.5 hours, then water-cool, then keep warm at 200-210°C for 2 ho...

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Abstract

The invention belongs to the technical field of alloy and specially relates to yttrium-containing 6063 aluminum alloy and a preparation method for the same. The yttrium-containing 6063 aluminum alloyprovided by the invention, by mass, comprises the following ingredients including 0.45%-0.54% of Si, 0.52%-0.56% of Mg, no more than 0.35% of Fe, no more than 0.05% of Cu, no more than 0.07% of Mn, nomore than 0.05% of Zn, 0.0075%-0.01% of Ti, 0.1%-0.2% of Y (yttrium), 0.0015%-0.002% of B and the balance being Al. The aluminum alloy and the method provided by the invention have the beneficial effects that scopes of low contents of elements such as Mg and Si are determined; and the strength of the yttrium-containing 6063 aluminum alloy is enhanced through simultaneous precipitation of boridesand intermetallic compounds. According to results of the embodiment, the tensile strength of the yttrium-containing 6063 aluminum alloy provided by the invention reaches 230MPa and the elongation of the yttrium-containing 6063 aluminum alloy reaches 25% under a room temperature.

Description

technical field [0001] The invention belongs to the field of alloy technology, in particular to a 6063 aluminum alloy containing yttrium 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 currently ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C1/06C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05
Inventor 丁万武李常锋赵小燕唐兴昌张海霞赵文军李建胜赵哲臣
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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