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Method for modifying and thinning of deformable aluminum alloy

A deformed aluminum alloy, metamorphic and refined technology, which is applied in the field of chemical metallurgy, can solve the problems of poor mechanical properties, unstable metamorphic and refined effects, and easy decay, and achieve the effect of not easy to decay, stable refining effect, and increased physical properties

Inactive Publication Date: 2016-09-07
四川朗峰电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for modification and refinement of deformed aluminum alloy, which can solve the problem of unstable modification and refinement effect in traditional modification methods, and easy decline. Eutectic silicon, the problem of poor mechanical properties

Method used

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  • Method for modifying and thinning of deformable aluminum alloy

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Embodiment 1

[0035] A method for modifying and refining a deformed aluminum alloy, comprising the following steps:

[0036] (1) Smelting, put the cast aluminum alloy material into the smelting furnace for smelting, and add 25% SiC by weight and 75% CaC by weight during the smelting process 2 After adding the compound deoxidizer for 10 minutes, remove the scum above the solution to obtain the deoxidized aluminum alloy solution;

[0037] (2) Refining. When the temperature in the furnace reaches 680°C, the Ca-Al-Si-Li-Fe refining agent is blown into the melting chamber through nitrogen rotation, and then kept at a temperature of 680°C for 10 minutes to remove the aluminum alloy solution. Gas and non-metallic impurities, wherein the mass ratio of refining agent to aluminum alloy is 0.05:1;

[0038] (3) Modification, add a modification agent composed of Al-5Ti-B master alloy and Al-10RE master alloy in the tempering chamber, and carry out modification treatment to the aluminum alloy solution. Th...

Embodiment 2

[0047] A method for modifying and refining a deformed aluminum alloy, comprising the following steps:

[0048] (1) Smelting, put the cast aluminum alloy material into the smelting furnace for smelting, and add 30% SiC by weight and 70% CaC by weight during the smelting process 2 Composite deoxidizer. After adding for 10 minutes, remove the scum above the solution to obtain a deoxidized aluminum alloy solution.

[0049] (2) Refining. When the temperature in the furnace reaches 700°C, the Ca-Al-Si-Li-Fe refining agent is blown into the melting chamber through nitrogen rotation, and then kept at a temperature of 700°C for 15 minutes to remove the aluminum alloy solution. Gas and non-metallic impurities, the mass ratio of refining agent to aluminum alloy is 0.07:1.

[0050] (3) Modification, adding a modification agent composed of Al-5Ti-B master alloy and Al-10RE master alloy in the tempering chamber to modify the aluminum alloy solution. The method of modification treatment i...

Embodiment 3

[0059] A method for modifying and refining a deformed aluminum alloy, comprising the following steps:

[0060] (1) Smelting, putting the cast aluminum alloy material into a smelting furnace for smelting, and adding 40% SiC by weight and 60% CaC by weight during the smelting process 2 After adding the compound deoxidizer for 10 minutes, remove the scum above the solution to obtain the deoxidized aluminum alloy solution.

[0061] (2) Refining. When the temperature in the furnace reaches 730°C, the Ca-Al-Si-Li-Fe refining agent is blown into the melting chamber through nitrogen rotation, and then kept at a temperature of 730°C for 10 minutes to remove the aluminum alloy solution. Gas and non-metallic impurities, the mass ratio of refining agent to aluminum alloy is 0.08:1.

[0062] (3) Modification, adding a modification agent composed of Al-5Ti-B master alloy and Al-10RE master alloy in the tempering chamber to modify the aluminum alloy solution. The method of modification tre...

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Abstract

The invention relates to a method for modifying and thinning of a deformable aluminum alloy, and belongs to the field of chemical metallurgy. The method comprises the following steps of performing smelting, performing refining, performing modifying, performing thinning, removing gas, performing filtration for removing residues and the like, wherein the smelting step further comprises a step of deoxidizing. According to the method disclosed by the invention, the thinning effect is stable and not liable to fade; the problems that the aluminum alloy is easy to cut apart and poor in mechanical performances are solved; the tensile strength is 260-270Mpa; a deoxidizing agent is used by the method disclosed by the invention, so that when the aluminum alloy is under a state of smelting, the oxidization of oxygen to the fused solution of the aluminum alloy is isolated; the physical performances of the aluminum alloy are improved. A refining agent is used, so that oxides contained in the aluminum alloy can be removed, and a metallic solution is protected from secondary oxidation. A tombarthite modifying agent is used in the method disclosed by the invention, can enable flat-elongated eutectic silicon to be thinned to short-rod-shaped eutectic silicon or parcel-shaped eutectic silicon, and can be used as an external crystal nucleus of a crystallization, so that the alloy structure is thinned, and the modifying agent has long residual action and is free from pollution.

Description

technical field [0001] The invention relates to the field of chemical metallurgy, in particular to a method for modifying and refining deformed aluminum alloys. Background technique [0002] In the prior art, during the aluminum alloy casting process, according to the solidification characteristics of the ingot, a coarse dendrite structure is often formed inward on the subsurface layer of the ingot, and the remaining low-melting point liquid phase is often adsorbed between the dendrite structures. Dendrite segregation is formed, resulting in uneven structure and composition of the ingot, which has a great impact on the performance of the ingot. On the one hand, due to the uneven structure and composition of the aluminum alloy ingot, the stress level suffered by the ingot during casting is reduced, and the thermal stress during the cooling process of the ingot or casting causes deformation and cracking of the ingot or casting, resulting in serious production accidents; On th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C21/00C22C1/03
CPCC22C1/03C22C1/026C22C1/06C22C21/00
Inventor 梁小燕曾太洋朱丽萍何晓东李拓
Owner 四川朗峰电子材料有限公司
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