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Flux-free aluminium alloy additive agent and preparation method

An additive and aluminum alloy technology, which is applied in the field of flux-free aluminum alloy additives and preparation, can solve problems such as air, soil and water pollution, and achieve the effects of improved purity of melt, simple addition method, and stable content

Inactive Publication Date: 2009-03-11
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional aluminum alloy additives contain halide salts such as fluoroaluminate as a flux, which will release a large amount of fluorine-containing pollutants such as fluorine fume during use, causing great pollution to the atmosphere, soil and water

Method used

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  • Flux-free aluminium alloy additive agent and preparation method

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Effect test

preparation example Construction

[0023] 2. Preparation of Additives

[0024] Add 5% to 30% aluminum powder to the metal powder, mix well and press it into a briquette of 50 to 500g with a press after weighing. After passing the inspection, it is sealed and packaged.

Embodiment 1

[0025] Example 1 Iron additive

[0026] (1) Using known methods to prepare iron powder with a purity of not less than 98% and an average particle size of the powder between 0.01 and 0.5 mm, and aluminum powder with a purity of not less than 95% and an average particle size of the powder between 0.01 and 0.5 mm;

[0027] (2) by 80% iron powder, the proportioning of 20% aluminum powder mixes raw material in mixer;

[0028] (3) After fully mixing evenly, press it into a 200g briquette with a press for weighing, and seal the package.

Embodiment 2

[0029] Example 2 Manganese additive

[0030] (1) Manganese powder with a purity of not less than 98% and an average powder particle size of 0.01 to 0.5 mm and an aluminum powder with a purity of not less than 95% and an average powder particle size of 0.01 to 0.5 mm are prepared by known methods;

[0031] (2) by 85% iron powder, the proportioning of 15% aluminum powder is mixed with raw material in mixer;

[0032] (3) After fully mixing evenly, press into a 50g briquette with a press for weighing, and seal the package.

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Abstract

The invention belongs to the field of nonferrous metal aluminum alloy processing and relates to a flux-free aluminum alloy additive and a preparation method thereof. The additive is formed by pressing metal powder and aluminum powder, and the compositions in weight percentage of the additive are 70 to 95 percent of the metal powder and 5 to 30 percent of the aluminum powder, wherein the metal powder in the additive is one type or a plurality of types among iron, manganese, copper, titanium, chromium and nickel. The performance of the metal powder and the aluminum powder meets the demands that: firstly, the purity of the metal powder is not less than 98 percent, and the average mean diameter of the powder is between 0.01 and 0.5 millimeter; and secondly, the purity of the aluminum powder is not less than 95 percent, and the average mean diameter of the powder is between 0.01 and 0.5 millimeter. The preparation method is to uniformly mix the metal powder and the aluminum powder, to press the mixture into blocks by a press machine, and to perform hermetical package. The preparation method has the advantages of simple addition means, quick melting under the condition of normal aluminum alloy casting temperature, high extraction yield, stable content, easy control, no flux contained, incapability of exhausting fluorine-containing pollutant, and improvement of the purity of fused masses.

Description

technical field [0001] The invention belongs to the field of nonferrous metal aluminum alloy processing, and relates to a flux-free aluminum alloy additive and a preparation method. Background technique [0002] About 82% of aluminum is used in the form of alloys. When smelting aluminum alloy, it is necessary to add iron, manganese, copper, titanium, chromium, nickel and other metals to adjust the composition of the alloy. In the smelting process, master alloys are usually used to add alloy elements, but master alloys have the disadvantages of high energy consumption, unstable composition, inconvenient feeding, storage and transportation, and high cost. Aluminum alloy additives not only have the superior characteristics of master alloys, but also overcome some shortcomings of master alloys, so aluminum alloy additives are more and more widely used. [0003] Traditional aluminum alloy additives contain halide salts such as fluoroaluminate as flux, which will release a large...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22B21/00
Inventor 曾克里许根国张淑婷陈舒予杨晓华孙建刚解峰陈美英魏伟王磊肖宁冀国娟谢建刚国俊丰占佳方淑媛
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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