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Aluminum-boron-carbon-nitrogen master alloy and preparation method thereof

A master alloy and pure aluminum technology, applied in the field of aluminum-boron-carbon-nitrogen master alloy and its preparation, can solve the problems of long preparation period, high cost of raw materials, complex preparation process, etc.

Active Publication Date: 2012-03-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this method is complicated, the preparation cycle is long, and the cost of raw materials is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) First prepare the required raw materials according to the following mass percentages: 26.7% of the aluminum-boron master alloy, 12% of the aluminum-carbon master alloy, 61.3% of pure aluminum, and dry treated pure nitrogen; wherein the aluminum- The mass percentage of boron in the boron master alloy is 3%, and the mass percentage of carbon in the aluminum-carbon master alloy used is 5%.

[0015] (2) Melt pure aluminum in an intermediate frequency furnace and heat it to 1000°C, then add the preheated aluminum-boron and aluminum-carbon intermediate alloys in sequence, and continuously blow nitrogen into the molten aluminum during the addition process, at 1200°C After heat preservation and stirring for 2-30 minutes, it is poured into ingots or made into wire rods.

[0016] The aluminum-boron-carbon-nitrogen master alloy prepared according to the above-mentioned proportion and process has the following mass percentages of chemical components: boron 0.80, carbon 0.60, ni...

Embodiment 2

[0018] (1) First prepare the required raw materials by the following mass percentages: 30% aluminum-boron master alloy, 15% aluminum-carbon master alloy, 55% pure aluminum, and pure nitrogen through dry treatment; wherein the aluminum-boron master alloy used The mass percentage of boron in the boron master alloy is 1%, and the mass percentage of carbon in the aluminum-carbon master alloy used is 8%.

[0019] (2) Melt pure aluminum in an intermediate frequency furnace and heat it to 1200°C, then add the preheated aluminum-boron and aluminum-carbon intermediate alloys in sequence, and continuously blow nitrogen into the molten aluminum during the addition process, at 1350°C After heat preservation and stirring for 2-30 minutes, it is poured into ingots or made into wire rods.

[0020] The aluminum-boron-carbon-nitrogen master alloy prepared according to the above-mentioned proportion and process has the following mass percentages of chemical components: boron 0.30, carbon 1.20, ...

Embodiment 3

[0022] (1) At first prepare the required raw materials by the following mass percentages: 60% aluminum-boron master alloy, 10% aluminum-carbon master alloy, 30% pure aluminum, and dry treated pure nitrogen; The mass percentage of boron in the boron master alloy is 5%, and the mass percentage of carbon in the aluminum-carbon master alloy used is 5%.

[0023] (2) Melt pure aluminum in an intermediate frequency furnace and heat it to 1100°C, add the preheated aluminum-boron and aluminum-carbon intermediate alloys in sequence, and continuously blow nitrogen into the molten aluminum during the addition process, at 1250°C After heat preservation and stirring for 2-30 minutes, it is poured into ingots or made into wire rods.

[0024] The aluminum-boron-carbon-nitrogen master alloy prepared according to the above-mentioned proportion and process has the following mass percentages of chemical components: boron 3.00, carbon 0.50, nitrogen 0.05-0.07, and the balance is aluminum.

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Abstract

The invention belongs to the metal material field, and relates to an aluminum-boron-carbon-nitrogen master alloy for thinning magnesium and magnesium alloy and a preparation method thereof. The aluminum-boron-carbon-nitrogen master alloy is characterized by comprising the following elements in percentage by mass: 94.00 to 99.00 percent of aluminum, 0.10 to 4.00 percent of boron, 0.10 to 2.00 percent of carbon, and 0.01 to 0.50 percent of nitrogen. The preparation method for the aluminum-boron-carbon-nitrogen master alloy comprises the following steps of: melting pure aluminum in an intermediate frequency furnace and heating the aluminum melt to between 1,000 and 1,200 DEG C, then adding the preheated aluminum-boron and aluminum-carbon master alloy into the aluminum melt in turn while continuously blowing dried pure nitrogen into the aluminum melt, preserving the heat at the temperature of between 1,200 and 1,400 DEG C, stirring the mixture for 2 to 30 minutes, and casting the mixture to form ingots or wires. The prepared aluminum-boron-carbon-nitrogen master alloy has obvious grain thinning effect on the magnesium and the magnesium alloy.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to an aluminum-boron-carbon-nitrogen master alloy for refining magnesium and magnesium alloy grains and a preparation method thereof. Background technique [0002] Magnesium and its alloys have the advantages of low density, high specific strength and specific stiffness, and are more and more widely used in transportation, aerospace and other fields that require lightweight, energy saving and emission reduction, becoming the third largest after steel and aluminum alloys. Big metal material. However, due to the hexagonal close-packed crystal structure of magnesium, its slip system is less, which leads to its poor plastic deformation ability, which limits the application of magnesium alloys to a large extent. The study found that fine equiaxed grains can improve the plastic deformation ability of magnesium alloys, and at the same time increase their strength in the way of f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/03
Inventor 刘相法马国龙韩广丁海民
Owner SHANDONG UNIV
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