Preparation method for in-situ aluminium base composite material inoculant

An aluminum-based composite material and an inoculant technology, applied in the field of aluminum-based alloys, can solve the problems of low production efficiency, high production cost, dispersion and distribution, etc., and achieve the effects of high production efficiency, low production cost, and enhancement effect.

Active Publication Date: 2013-12-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for preparing an inoculant for in-situ aluminum-based composite materials, which is to obtain a thin strip-shaped AlN-TiN / Al nano-in-situ aluminum-based composite by using plasma metallurgical nitriding and rapid solidification technology. The method of material inoculant, which overcomes the shortcomings of in-situ reinforcement particles in the in-situ composite material produced by the existing in-situ composite material preparation method that cannot be dispersed on the matrix, low production efficiency and high production cost, and at the same time Acicular TiAl 3 The adverse effect on the matrix structure caused by precipitation on the grain boundary finally produces an in-situ aluminum matrix composite inoculant with finer size and more dispersed nucleation particles

Method used

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  • Preparation method for in-situ aluminium base composite material inoculant
  • Preparation method for in-situ aluminium base composite material inoculant
  • Preparation method for in-situ aluminium base composite material inoculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The first step, ingredients

[0050] According to the set composition ratio of 10.0%Ti, 0.9%B and the rest is Al, weigh the required amount of domestic Al-5Ti-1B alloy and metal pure Ti, and carry out the ingredients. The above percentages are weight percentages.

[0051] In the second step, the alloy is smelted to obtain a smelted bulk Al-10Ti-1B alloy

[0052] Put all the ingredients in the first step into a non-consumable vacuum arc furnace, and vacuumize to a degree of vacuum of 1.26×10 -2 Pa, heating all the ingredients to the melting temperature, and pouring into a steel mold after holding for 5 minutes to obtain a smelted Al-10Ti-1B alloy.

[0053]The third step, plasma nitriding treatment to obtain bulk AlN-TiN / Al composites

[0054] Put the smelted Al-10Ti-1B alloy obtained in the second step into a graphite crucible, and then cover the crucible with a graphite lid with a hole in the middle. Each time the plasma nitriding treatment is performed, the flow rate...

Embodiment 2

[0058] The first step, ingredients

[0059] According to the set composition ratio of 10.2%Ti, 1.1%B and the rest are Al, weigh the required amount of domestic Al-5Ti-1B alloy and metal pure Ti, and carry out ingredients, and the above percentages are weight percentages;

[0060] In the second step, the alloy is smelted to obtain a smelted bulk Al-10Ti-1B alloy

[0061] Put all the ingredients in the first step into a non-consumable vacuum arc furnace, and vacuumize to a degree of vacuum of 1.26×10 -2 Pa, heating all the ingredients to the melting temperature, and pouring into a steel mold after holding the temperature for 6 minutes to obtain a smelted Al-10Ti-1B alloy.

[0062] The third step, plasma nitriding treatment to obtain bulk AlN-TiN / Al composites

[0063] Put the smelted Al-10Ti-1B alloy obtained in the second step into a graphite crucible, and then cover the crucible with a graphite lid with a hole in the middle. Each time the plasma nitriding treatment is perfor...

Embodiment 3

[0067] The first step, ingredients

[0068] According to the set composition ratio of 10.5%Ti, 1.2%B and the rest are Al, weigh the required amount of domestic Al-5Ti-1B alloy and metal pure Ti, and carry out ingredients, and the above percentages are weight percentages;

[0069] In the second step, the alloy is smelted to obtain a smelted bulk Al-10Ti-1B alloy

[0070] Put all the ingredients in the first step into a non-consumable vacuum arc furnace, and vacuumize to a degree of vacuum of 1.26×10 -2 Pa, heating all the ingredients to the melting temperature, and pouring into a steel mold after holding for 8 minutes to obtain a smelted block Al-10Ti-1B alloy.

[0071] The third step, plasma nitriding treatment to obtain bulk AlN-TiN / Al composites

[0072] Put the smelted Al-10Ti-1B alloy obtained in the second step into a graphite crucible, and then cover the crucible with a graphite lid with a hole in the middle. Each time the plasma nitriding treatment is performed, the f...

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Abstract

The invention discloses a preparation method for an in-situ aluminium base composite material inoculant, and relates to an aluminium base alloy, in particular to a method for preparing a thin-strip AlN-TiN / Al nanometer in-situ aluminium base composite material inoculant by the plasma metallurgy nitridation and rapid solidification technology. The preparation method comprises the following steps of: weighing domestic Al-5Ti-1B alloy and metal pure Ti of the required amount at the following set ingredient ratio: 10.0-10.5% of Ti, 0.9-1.2% of B and the balance of Al; putting all raw materials into a nonconsumable vacuum arc furnace to be smelted to obtain a smelted blocky Al-10Ti-1B alloy; then, obtaining blocky Al-10Ti-1B alloy composite material by plasma nitriding treatment; and finally, carrying out rapid solidification treatment to obtain the thin-strip AlN-TiN / Al nanometer in-situ aluminium base composite material inoculant. The inoculant is provided with nucleation particles with smaller size and more dispersed distribution, and the particle enhancement effect is improved. The method has the advantages of high production efficiency and low cost.

Description

technical field [0001] The technical scheme of the present invention relates to an aluminum-based alloy, in particular to a preparation method of an in-situ aluminum-based composite material inoculant. Background technique [0002] In the industrial production of aluminum and its alloys, the method of adding an inoculant (also known as a refiner or inoculant refiner) to the melt is used to improve the overall performance of the product, due to its simplicity, practicality and ease of operation. , so it has broad application prospects. So far, Al-5Ti-1B master alloy is recognized as the most effective inoculant, and Al-5Ti-B inoculant is used to inoculate aluminum and its alloy crystals. Grain refinement of aluminum and its alloys by heterogeneous nucleation and alloying. International Materials Reviews, 2002, 47(1):3-29.). The Al-5Ti-B inoculant can increase the casting speed, reduce cracks, eliminate cold insulation and feathery crystals, and bring greater flexibility to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/00C22C1/02C22C32/00
Inventor 崔春翔王奎王倩刘双进戚玉敏
Owner HEBEI UNIV OF TECH
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