Efficient aluminum alloy refining agent and preparation method thereof

A refining agent and aluminum alloy technology, which is applied in the field of aluminum alloy processing, can solve the problems of high hydrogen content and non-metallic inclusion content, and achieve the effects of good impurity removal effect, strong degassing ability, and uniform microstructure compactness

Inactive Publication Date: 2018-03-09
广西平果铝合金精密铸件有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency refining agent for aluminum alloys and its preparation method, to solve the problems of high hydrogen content and non-metallic inclusions in aluminum alloys, and to reduce the gas content and non-metallic inclusions in aluminum alloy melts. Targeting of Metal Inclusion Content to Improve Properties of Aluminum Alloy Materials

Method used

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  • Efficient aluminum alloy refining agent and preparation method thereof

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preparation example Construction

[0024] The preparation method of the high-efficiency refining agent for aluminum alloy comprising the above raw materials and components comprises the following steps:

[0025] S1: La 2 o 3 Dissolve in hydrochloric acid and dilute to 120-130g / L, heat the solution to 72-75°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, and dry the precipitate until the water content is ≤2% , crushed to a particle size of ≤2mm, and dehydrated under the condition of a vacuum of 0.5-0.8MPa to obtain F 3 La powder;

[0026] S2: put Nd 2 o 3 Dissolve in hydrochloric acid and dilute to 120-130g / L, heat the solution to 72-75°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, and dry the precipitate until the water content is ≤2% , Grinding to particle size ≤ 2mm, and dehydrating under the condition of vacuum degree of 0.5-0.8MPa to obtain FNd powder;

[0027] S3: KCl, NaCl, KNO 3 , A1F 3 , MgF 2 、Na 3 A1F 6 、Na 2 SiF 6 Put the po...

Embodiment 1

[0030] A high-efficiency refining agent for aluminum alloys, in parts by weight, comprising the following components: 30 parts of KCl, 30 parts of NaCl, KNO 3 30 copies, A1F 3 11 parts, MgF 2 4 parts, Na 3 A1F 6 5 parts, Na 2 SiF 6 7 parts, FNd 0.2 parts, F 3 La0.7 parts;

[0031] The preparation method of the high-efficiency refining agent for aluminum alloy comprising the above raw materials and components comprises the following steps:

[0032] S1: La 2 o 3 Dissolve in hydrochloric acid and dilute to 120g / L, heat the solution to 75°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, dry the precipitate to a water content of ≤2%, and crush to particle size ≤2mm, dehydration under the condition of vacuum degree of 0.6MPa to get F 3 La powder;

[0033] S2: put Nd 2 o 3 Dissolve in hydrochloric acid and dilute to 120g / L, heat the solution to 75°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, dry the preci...

Embodiment 2

[0037] A high-efficiency refining agent for aluminum alloys, in parts by weight, comprising the following components: 40 parts of KCl, 24 parts of NaCl, KNO 3 40 copies, A1F 3 7 parts, MgF 2 3 parts, Na 3 A1F 6 4 parts, Na 2 SiF 6 3 parts, FNd 0.6 parts, F 3 La 0.5 parts;

[0038] The preparation method of the high-efficiency refining agent for aluminum alloy comprising the above raw materials and components comprises the following steps:

[0039] S1: La 2 o 3 Dissolve in hydrochloric acid and dilute to 130g / L, heat the solution to 74°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, dry the precipitate to a water content of ≤2%, and crush to particle size ≤2mm, dehydration under the condition of vacuum degree of 0.5MPa to get F 3 La powder;

[0040] S2: put Nd 2 o 3 Dissolve in hydrochloric acid and dilute to 130g / L, heat the solution to 74°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, dry the pre...

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Abstract

The invention belongs to the technical field of aluminum alloy processing and discloses an efficient aluminum alloy refining agent and a preparation method thereof. The refining agent comprises, by weight, 30-40 parts of KCl, 20-30 parts of NaCl, 30-40 parts of KNO3, 6-11 parts of A1F3, 3-8 parts of MgF2, 4-10 parts of Na3A1F, 2-7 parts of Na2SiF6, 0.2-0.6 part of FNd and 0.5-1.1 parts of F3La. The efficient aluminum alloy refining agent is efficient in removal of small-size oxide inclusions, great in impurity removal, excellent in degassing and refining performance and capable of decreasing hydrogen content of aluminum alloy melt to 0.0816ml / 100gAl or below.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a high-efficiency refining agent for aluminum alloys and a preparation method thereof. Background technique [0002] China ranks third in the world's aluminum consumption rankings. Although China's aluminum production ranks second in the world, most of the aluminum used in China is imported, and it is the world's largest aluminum importer. The reason for this situation is that China's aluminum industry is still far behind advanced countries in terms of production process control, product quality control, and production scale. Most importantly, China's lack of capacity and a large gap in the supply of high-quality aluminum billets are the main problems. In the process of smelting and casting, aluminum and its alloys are easily oxidized and absorb gas. This characteristic makes gas and inclusions easy to form in molten aluminum, which in turn causes a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C21/00
CPCC22C1/06C22C21/00
Inventor 梁春才梁健梁祥友
Owner 广西平果铝合金精密铸件有限公司
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