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A kind of rare earth-containing aluminum alloy sodium-free refining agent

A sodium-free refining agent and aluminum alloy technology, which is applied in the field of aluminum alloy melting and processing to achieve the effects of good refining effect, simple preparation process and good hydrogen removal effect

Active Publication Date: 2018-06-08
广西平果铝合金精密铸件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the refining agents disclosed in my country generally contain one or more of sodium salts such as sodium chloride, sodium fluoroaluminate, sodium carbonate, sodium sulfate, sodium fluoride, and sodium fluorosilicate. For example, the application publication number is CN Patent No. 103255305 A discloses a high-efficiency refining agent for aluminum alloys. The components are: NaCl: 20-45%, KCl: 25-30%, CaF 2 :1-5%, Na 2 SO 4 :1-5%, Na 3 AlF 6 : 15-43%, the use of this sodium salt will introduce sodium into aluminum-magnesium, aluminum-copper, aluminum-lithium alloys, resulting in "sodium embrittlement" phenomenon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A rare earth-containing aluminum alloy sodium-free refining agent, comprising the following raw materials in parts by weight: 55 parts of KCl, K 2 CO 3 32 parts, LiCl12 parts, AlF 3 33 parts, potassium fluoroaluminate 11 parts, CaF 2 8 parts, 8 parts of carbon powder, 20 parts of light calcium carbonate, 6 parts of CaO, 3 parts of fluorite, 8 parts of rare earth; wherein: the rare earth is a mixture of La, Y, Ce and Er, and the ratio of rare earth metals is as follows Composition: 25 parts of La, 25 parts of Y, 25 parts of Ce, 12 parts of Er.

[0034] The preparation method of the above-mentioned rare earth-containing aluminum alloy sodium-free refining agent comprises the following steps: S1, pulverize each raw material separately, and pass through a 60-80 mesh screen; S2, put the raw materials prepared in step S1 in proportion by weight Put it into a blender, mix well and evenly to obtain a uniform mixture; S3, put the uniform mixture prepared in step S2 into an ov...

Embodiment 2

[0037] A sodium-free refining agent for aluminum alloys containing rare earths, comprising the following raw materials in parts by weight: 50 parts of KCl, K 2 CO 3 30 parts, LiCl10 parts, AlF 3 35 parts, potassium fluoroaluminate 15 parts, CaF 2 10 parts, 5 parts of carbon powder, 15 parts of light calcium carbonate, 3 parts of CaO, 5 parts of fluorite, 5 parts of rare earth; wherein: the rare earth is a mixture of La, Y, Ce and Er, and the ratio of rare earth metals is as follows Composition: 30 parts of La, 30 parts of Y, 20 parts of Ce, and 20 parts of Er.

[0038] The preparation method of the above-mentioned rare earth-containing aluminum alloy sodium-free refining agent comprises the following steps: S1, pulverize each raw material separately, and pass through a 60-80 mesh screen; S2, put the raw materials prepared in step S1 in proportion by weight Put it into a blender, and mix well to obtain a uniform mixture; S3, put the uniform mixture prepared in step S2 into a...

Embodiment 3

[0041] A rare earth-containing aluminum alloy sodium-free refining agent, comprising the following raw materials in parts by weight: 60 parts of KCl, K 2 CO 3 35 parts, LiCl15 parts, AlF 3 30 parts, potassium fluoroaluminate 10 parts, CaF 2 5 parts, 10 parts of carbon powder, 25 parts of light calcium carbonate, 8 parts of CaO, 2 parts of fluorite, 10 parts of rare earth; wherein: the rare earth is a mixture of La, Y, Ce and Er, and the rare earth metal is composed of the following weight ratios : 20 parts of La, 20 parts of Y, 30 parts of Ce, 10 parts of Er.

[0042] The preparation method of the above-mentioned rare earth-containing aluminum alloy sodium-free refining agent comprises the following steps: S1, pulverize each raw material separately, and pass through a 60-80 mesh screen; S2, put the raw materials prepared in step S1 in proportion by weight Put it into a blender, mix well and evenly to obtain a uniform mixture; S3, put the uniform mixture prepared in step S2 ...

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PUM

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Abstract

The invention discloses an aluminum alloy sodium-free refining agent containing rare earth. The aluminum alloy sodium-free refining agent comprises, by weight, 50-60 parts of KCl, 30-35 parts of K2CO3, 10-15 parts of LiCl, 30-35 parts of AlF3, 10-12 parts of potassium fluoroaluminate, 5-10 parts of CaF2, 5-10 parts of carbon powder, 15-25 parts of light calcium carbonate, 2-8 parts of CaO, 2-5 parts of fluorite and 5-10 parts of rare earth. By means of the refining agent, no impurity sodium is introduced into the aluminum alloy refining process, rare earth metal is added, and therefore the mechanical performance of alloy can be effectively improved.

Description

technical field [0001] The invention relates to the field of aluminum alloy smelting and processing, in particular to a rare earth-containing aluminum alloy sodium-free refining agent. Background technique [0002] Aluminum and its alloys are easy to oxidize and absorb gas during smelting and casting, which makes it easy to form gas and inclusions in molten aluminum, which will cause pores, shrinkage cavities, shrinkage porosity, cracks, insufficient casting and A series of defects such as leakage greatly reduce the strength, plasticity, fatigue resistance, corrosion resistance and other properties of the material, and even cause the casting to be scrapped, which greatly restricts the application of aluminum alloy. Therefore, it is very important to improve the purity of aluminum alloy. significance; the process of melt purification is also a key technology to ensure the metallurgical quality of aluminum alloy materials, and has become a topic of great concern to researchers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C1/02C22C21/00
CPCC22C1/026C22C1/06
Inventor 梁健
Owner 广西平果铝合金精密铸件有限公司
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