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Aluminum preliminary alloy refiner containing titanium and vanadium, aluminum alloy containing titanium and vanadium and preparation method

An aluminum master alloy and refiner technology, which is applied in the field of aluminum and aluminum alloys, can solve the problems of unfavorable aluminum foil processing, large size, poor wettability between liquid aluminum and carbon, etc.

Active Publication Date: 2010-03-10
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production of aluminum and aluminum alloys, the traditional refiners are mostly carbides and borides containing titanium. However, in the industrial application in the past ten years, it has been found that there are some deficiencies in the use process, such as Al-Ti-B master alloy as its grain refiner, but the TiB produced by adding such refiner 2 Particles will gather and precipitate in the aluminum liquid, which not only leads to the decline of the grain refinement effect on aluminum and aluminum alloys, especially for aluminum alloys containing Zr and Cr, it is easy to cause TiB 2 The particles are "poisoned", and even lose the refining effect on aluminum and aluminum alloys, and due to TiB 2 The size of the particle cluster is large, which is not conducive to the subsequent processing of products such as aluminum foil; when using Al-Ti-C master alloy as the refiner, although the TiC particle size produced by adding the refiner is small, it is not like TiB 2 The particles are easy to aggregate, so it has more potential in the production of aluminum foil, but the wettability of liquid aluminum and carbon is poor, and TiC particles are easy to react with aluminum melt to form Al 4 C 3 , which also leads to a rapid decline in the refining effect on aluminum and its alloys
In short, due to some defects of the traditional grain refiner itself, it also restricts the improvement of the comprehensive performance of aluminum and aluminum alloys.

Method used

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  • Aluminum preliminary alloy refiner containing titanium and vanadium, aluminum alloy containing titanium and vanadium and preparation method
  • Aluminum preliminary alloy refiner containing titanium and vanadium, aluminum alloy containing titanium and vanadium and preparation method

Examples

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Effect test

Embodiment 1

[0083] The raw materials used in this embodiment and the processing steps are as follows:

[0084] The raw material is aluminum powder 1g, (V 0.95 Ti 0.05 ) C powder 99g. The measured aluminum powder and (V 0.95 Ti 0.05 ) C powder is subjected to rolling ball milling, the mass ratio of ball to material is 6:1, the ball milling time is limited to the uniform mixing of raw materials (about 10 hours), and then the uniformly mixed raw materials are pressed into shape, and the compact size is Φ1.6cm×2.5cm, Then put the compact into the heating furnace, and feed in argon or hydrogen at a flow rate of 1.5L / min. After feeding in argon or hydrogen to remove the air in the furnace (about 3 minutes), heat it to 300°C and keep it at 300°C After 4 hours, after the heat preservation is completed, the furnace is cooled to below 100°C and taken out of the furnace, and the vanadium-containing titanium-aluminum master alloy refiner 76.30%V-3.78%Ti-18.92%C-1%Al is obtained.

Embodiment 2

[0086] The raw materials used in this embodiment and the processing steps are as follows:

[0087] The raw materials are 1g of aluminum powder, 5.25g of VC powder and 93.75g of TiC powder. The measured aluminum powder, VC powder, and TiC powder are rolled and ball milled, the mass ratio of ball to material is 6:1, the ball milling time is limited to the uniform mixing of raw materials (about 10 hours), and then the uniformly mixed raw materials are pressed into shape, and compacted The size is Φ1.6cm×2.5cm, and then put the green compact into the heating furnace, and pass in argon or hydrogen, the flow rate is 1.5L / min, and heat it after passing in argon or hydrogen to remove the air in the furnace (3min) Heat it to 700°C and keep it at 700°C for 1 hour. After the heat preservation is over, cool it down to below 100°C and take it out of the furnace to get the vanadium-containing titanium-aluminum master alloy refiner 4.25%V-74.97%Ti-19.78%C-1%Al.

Embodiment 3

[0089] The raw materials used in this embodiment and the processing steps are as follows:

[0090] The raw material is aluminum powder 1g, (V 0.05 Ti 0.95 ) N powder 99g. The measured aluminum powder and (V 0.05 Ti 0.95 )N powder is subjected to rolling ball milling, the mass ratio of ball to material is 10:1, the ball milling time is limited to the uniform mixing of raw materials (about 24 hours), and then the uniformly mixed raw materials are pressed into shape, and the compact size is Φ1.6cm×2.5cm, Then put the compact into the heating furnace and feed nitrogen gas at a flow rate of 5L / min. After the nitrogen gas is fed to remove the air in the furnace (about 3 minutes), heat it to 750°C and keep it at 750°C for 0.5h. Cool the furnace to below 100°C and take out the furnace to obtain a vanadium-containing titanium-aluminum master alloy refiner 4.06%V-72.60%Ti-22.34%N-1%Al.

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Abstract

The invention discloses an aluminum preliminary alloy refiner containing titanium and vanadium, comprising the following components by weight percent: 1 to 99% of aluminum, 0.01 to 77% of vanadium, 0.01 to 77% of titanium, 0 to 20% of carbon and 0 to 23% of nitrogen, wherein at least one of carbon and nitrogen exists in preliminary alloy refiner. Aluminum alloy which contains titanium and vanadium comprises the following chemical components by weight percent: 0.001 to 1% of vanadium and 0.001 to 1% of titanium. The aluminum preliminary alloy refiner containing titanium and vanadium has five preparation methods, and aluminum alloy which contains titanium and vanadium have two preparation methods.

Description

technical field [0001] The invention belongs to the field of aluminum and aluminum alloys, and relates to an aluminum master alloy refiner containing vanadium and titanium, an aluminum alloy containing vanadium and titanium and their preparation methods. Background technique [0002] Due to the characteristics of light weight, abundant resources, and good comprehensive performance, aluminum alloys have been widely used in the fields of machinery, transportation, aerospace and military industries, and their demand is increasing year by year. With the development of high technology, higher requirements are put forward for the comprehensive mechanical properties of aluminum and aluminum alloys. According to the Hall-Petch formula, grain refinement is an effective means to improve the strength and plasticity and toughness of aluminum and aluminum alloys. Therefore, different grain refinement methods can be used to obtain aluminum and aluminum alloys with fine equiaxed grain str...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C30/00C22C21/00C22C27/02C22C1/05C22C1/02C22C1/03C22C21/02C22C21/12C22C21/14C22C21/16B22D21/04
Inventor 刘颖叶金文唐正华邓莉
Owner SICHUAN UNIV
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