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Production and preparation process of high-strength aluminum alloy casting rod

A preparation process and aluminum alloy technology, which is applied in the field of aluminum alloy cast rod production, can solve the problems of many impurities, non-equilibrium crystallization, and affecting product performance, and achieve the effects of easy moisture, strong water absorption, and high efficiency

Inactive Publication Date: 2020-10-30
湖北华力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a production and preparation process of high-strength aluminum alloy casting rods, which solves the problem of excessive impurities in aluminum alloy casting rod waste, which reduces the clarity of aluminum alloy casting rods during production and affects product performance. When the aluminum alloy cast rod is extruded, it is not heated, resulting in an imbalance of chemical composition in the grain, resulting in the problem of non-equilibrium crystallization

Method used

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  • Production and preparation process of high-strength aluminum alloy casting rod

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Comparison scheme
Effect test

Embodiment 1

[0030] A production and preparation process of high-strength aluminum alloy cast rods, comprising the following steps:

[0031] S1. Material preparation: remove the impurities on the surface of the waste material to remove the surface oxide, so that the surface of the waste material is smooth;

[0032] S2. Material melting: Add the scrap polished in step S1 into the melting furnace, and melt the scrap into an aqueous solution through the high temperature of 710°C in the melting furnace;

[0033] S3. Melting and refining: Open the upper cover of the furnace again, add refining agent to step S2 in the furnace, release chlorine gas and hydrogen gas to form HCL volatilization, prevent secondary pollution caused by impure nitrogen (including O2, H2O), pure N2, refining The agent can melt the slag to almost nothing, the temperature inside the furnace rises from 750℃, and the content of aluminum catalyst is 0.7kg / t;

[0034] S4. Melting casting: raise the casting temperature in the ...

Embodiment 2

[0048]A production and preparation process of high-strength aluminum alloy cast rods, comprising the following steps:

[0049] S1. Material preparation: remove the impurities on the surface of the waste material to remove the surface oxide, so that the surface of the waste material is smooth;

[0050] S2. Material melting: Add the waste material polished in step S1 into the furnace, and melt the waste material into an aqueous solution through the high temperature of 760°C in the furnace;

[0051] S3. Melting and refining: Open the upper cover of the furnace again, add refining agent to step S2 in the furnace, release chlorine gas and hydrogen gas to form HCL volatilization, prevent secondary pollution caused by nitrogen impurity (including O2, H2O), pure N2, refining The agent can melt the slag to almost nothing, the temperature inside the furnace rises from 760℃, and the content of aluminum catalyst is 1kg / t;

[0052] S4. Melting casting: raise the temperature of casting in ...

Embodiment 3

[0066] A production and preparation process of high-strength aluminum alloy cast rods, comprising the following steps:

[0067] S1. Material preparation: remove the impurities on the surface of the waste material to remove the surface oxide, so that the surface of the waste material is smooth;

[0068] S2. Material melting: Add the waste material polished in step S1 into the melting furnace, and melt the waste material into an aqueous solution through the high temperature of 735°C in the melting furnace;

[0069] S3. Melting and refining: Open the upper cover of the furnace again, add refining agent to step S2 in the furnace, release chlorine gas and hydrogen gas to form HCL volatilization, prevent secondary pollution caused by nitrogen impurity (including O2, H2O), pure N2, refining The agent can melt the slag to almost nothing, the temperature inside the furnace rises from 755℃, and the content of aluminum catalyst is 0.85kg / t;

[0070] S4. Melting casting: raise the temper...

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Abstract

The invention discloses a production and preparation process of a high-strength aluminum alloy casting rod, and relates to the technical field of aluminum alloy casting rod production. The process comprises the steps that a refining agent is added into a smelting furnace, chlorine gas is released to be combined with hydrogen gas to form HCL volatilization, secondary pollution caused by impure nitrogen (containing O2 and H2O) is prevented, pure N2 is obtained, the refining agent can basically totally melt dross, stirring is carried out for 20 min every other 15 min so that the refining agent can mix with a solution more sufficiently, a magnesium surface burns and absorbs hydrogen, thus, the solution in the smelting furnace can react and remove impurities more sufficiently by stirring, and the power of an oil gun is adjusted to the state that the rod temperature rises to about 570-590 DEG C within 2 hours as much as possible by heating the aluminum rod; a heat preservation area is homogenized, specifically, it should be ensured that the rod is subjected to heat preservation for 2 hours at 570-590 DEG C to reduce the rod temperature to an ideal extrusion temperature; and in the extrusion process of the aluminum rod, coarse grains in the aluminum rod are homogenized during extrusion, the homogenization time is much longer than that of fine grains, and therefore the finer the grains, the shorter the homogenization time.

Description

technical field [0001] The invention relates to the technical field of production of aluminum alloy cast rods, in particular to a production and preparation process of high-strength aluminum alloy cast rods. Background technique [0002] During the smelting and casting process of aluminum and aluminum alloys, the dissolved hydrogen atoms in the melt are prone to form bubbles after being precipitated during casting solidification, resulting in defects in aluminum and aluminum alloy ingots or castings. At the same time, during the smelting process, the melt reacts with the air to form oxides, and being involved in the melt will reduce its purity. If it is not removed in the subsequent production, oxide inclusions will be formed in the ingot or casting, which will affect the performance of the product. . Therefore, in the production of aluminum and aluminum alloys, refining treatment must be carried out to reduce the hydrogen content and remove inclusions. During the casting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/06B21C23/02
CPCB21C23/02C22C1/026C22C1/06
Inventor 叶光华叶天佑
Owner 湖北华力科技有限公司