Al-P intermediate alloy and preparation method thereof

A technology of phosphorus master alloy and black phosphorus, which is applied in the field of aluminum-phosphorus master alloy and its preparation, can solve problems such as easy precipitation, high melting point, and environmental pollution, and achieve small product batch differences, good refinement effect, and metamorphic effect Good results

Inactive Publication Date: 2012-02-15
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these methods all have many disadvantages: red phosphorus has a low ignition point (240°C), and a large amount of toxic P is released during deterioration treatment. 2 o 5 Gas, which seriously pollutes the environment; the phosphorus-copper master alloy has high density and high melting point. Under the condition of static furnace smelting, it is easy to precipitate and difficult to melt after being added to the aluminum alloy melt, and the metamorphic effect is unstable, and the copper content in the alloy increases.
The phosphorus-containing aluminum-based ternary or more than ternary master alloys involved in the above documents and patents are not easy to be rolled into wire rods due to their high brittleness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Prepare the raw materials required for producing the aluminum-phosphorus master alloy by the following mass percentages: 92.5% of 200 mesh industrial aluminum powder, 7.5% of 400 mesh black phosphorus powder;

[0018] (2) Mix the two powders evenly with a mixer, and dry them;

[0019] (3) Press the above-mentioned powder into a block with a press;

[0020] (4) Place the briquette in an electric furnace with an inert atmosphere (argon gas), raise the temperature to 640° C., stop heating after holding the temperature for 80 minutes, and obtain a block aluminum-phosphorus master alloy with regular shape after cooling in the furnace;

[0021] (5) Extrude the sintered block into a Φ9.5mm wire.

[0022] An aluminum-phosphorus master alloy with the best composition is obtained according to the above-mentioned proportion and process, the mass percent of its chemical composition is: aluminum 92.2, phosphorus 7.3, and the rest are impurities.

Embodiment 2

[0024] (1) Prepare the raw materials required for producing the aluminum-phosphorus master alloy by the following mass percentages: 95.5% of 300 mesh industrial aluminum powder, 4.5% of 400 mesh black phosphorus powder;

[0025] (2) Mix the two powders evenly with a mixer, and dry them;

[0026] (3) Press the above-mentioned powder into a block with a press;

[0027] (4) Place the briquette in an electric furnace with an inert atmosphere (argon gas), heat up to 660° C., stop heating after holding the temperature for 60 minutes, and obtain a block aluminum-phosphorus master alloy with a regular shape after cooling in the furnace;

[0028] (5) Extrude the sintered block into a Φ9.5mm wire.

[0029] An aluminum-phosphorus master alloy with optimal composition is obtained according to the above-mentioned proportion and process, the mass percent of its chemical composition is: aluminum 95.3, phosphorus 4.3, and the rest are impurities.

Embodiment 3

[0031] (1) Prepare the required raw materials for producing the aluminum-phosphorus master alloy by the following mass percentages: 98.5% of 500 mesh industrial aluminum powder, 1.5% of 200 mesh black phosphorus powder;

[0032] (2) Mix the two powders evenly with a mixer, and dry them;

[0033] (3) Press the above-mentioned powder into a block with a press;

[0034] (4) Place the briquette in an electric furnace with an inert atmosphere (nitrogen), raise the temperature to 720° C., stop heating after 90 minutes of heat preservation, and obtain a block aluminum-phosphorus master alloy with a regular shape after cooling in the furnace;

[0035] (5) Extrude the sintered block into a Φ9.5mm wire.

[0036] An aluminum-phosphorus master alloy with the best composition is obtained according to the above-mentioned proportion and process, the mass percent of its chemical composition is: aluminum 98.2, phosphorus 1.4, and the rest are impurities.

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Abstract

The invention belongs to the field of metal materials and particularly relates to an Al-P intermediate alloy which is used to refine primary crystal silicon in the Al-Si alloy and Mg2Si in the Mg-Si alloy, and a preparation method thereof. The Al-P intermediate alloy contains two elements, namely Al and P. The Al-P intermediate alloy is characterized in that the alloy comprises the following components by weight percent: 92.5-98.5% of Al, 1.5-7.5% of P and less than 0.8% of impurities. The preparation method of the Al-P intermediate alloy comprises the following steps of: mixing aluminum powder and black phosphorus powder evenly, drying, briquetting with a press machine, placing the obtained blocks in an electric furnace with the inert atmosphere or other heating devices, heating to 600-750 DEG C, keeping the temperature for 45-120 minutes, stopping heating, and cooling along with the furnace to obtain the blocky Al-P intermediate alloy or extruding the sintered blocks into wires. The Al-P intermediate alloy has a good refinement effect on the Al-Si alloy and the Mg-Si alloy.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to an aluminum-phosphorus master alloy used for refining primary silicon in Al-Si alloy and Mg2Si in Mg-Si alloy and a preparation method thereof. Background technique [0002] In industrial production, the method of adding phosphorus is generally used to refine the primary silicon in Al-Si alloy (also known as modification treatment), mainly in the form of red phosphorus, phosphorus salt or phosphorus-copper intermediate alloy. But these methods all have many disadvantages: red phosphorus has a low ignition point (240°C), and a large amount of toxic P is released during deterioration treatment. 2 o 5 Gas, which seriously pollutes the environment; the phosphorus-copper master alloy has high density and high melting point. Under the condition of static furnace smelting, it is easy to precipitate and difficult to melt after being added to the aluminum alloy melt, and the me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/05C22C1/03
Inventor 刘相法孙谦谦
Owner SHANDONG UNIV
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