High-heat-conductivity corrosion-resistant die-cast aluminum alloy and preparing technique thereof

A technology of corrosion-resistant aluminum alloy and cast aluminum alloy, which is applied in the field of metal materials, can solve the problems of corrosion resistance decline and anodic oxidation difficulty, and achieve the effect of superior thermal conductivity

Inactive Publication Date: 2015-12-02
苏州慧驰轻合金精密成型科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the ADC12 aluminum alloy contains about 10% Si element, the corrosion resistance is reduced, and anodic oxidation is difficult.

Method used

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  • High-heat-conductivity corrosion-resistant die-cast aluminum alloy and preparing technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1:50kgAl-2Si-1Mg-0.01Zn-0.05Sr high thermal conductivity die-casting aluminum alloy, that is, the composition content of the aluminum alloy is: 1.5wt.%Si, 1%wt.%Mg, 0.1%Zn, 0.05wt.%Sr, The rest is aluminum, and the content of other impurity elements is less than 0.005%.

[0030] 1. Ingredients and cleaning of the crucible: According to the amount of alloy to be smelted, the mass of the added alloy is calculated after considering the burning loss rate. If the surface is greasy, it needs to be cleaned, and the alloy ingot needs to be dried in an oven. The crucible should be cleaned and dried to prevent the influence of the residual material from the last smelting on the ratio of alloying elements.

[0031] 2. Melting of aluminum ingots: put pure aluminum ingots into the crucible of the pit furnace, heat the crucible for melting, and control the temperature of the molten aluminum between 700-730°C

[0032] 3. Add the master alloy: when the temperature of the aluminum liqu...

Embodiment 2

[0038] 50kgAl-3Si-2Mg-0.3Zn-0.07Sr high thermal conductivity die-casting aluminum alloy, that is, the composition content of the aluminum alloy is: 3wt.%Si, 2.5%wt.%Mg, 0.3%Zn, 0.07wt.%Sr, and the rest is aluminum , the content of other impurity elements is less than 0.005%.

[0039] 1. Ingredients and cleaning of the crucible: According to the amount of alloy to be smelted, the mass of the added alloy is calculated after considering the burning loss rate. If the surface is greasy, it needs to be cleaned, and the alloy ingot needs to be dried in an oven. The crucible should be cleaned and dried to prevent the influence of the residual material from the last smelting on the ratio of alloying elements.

[0040] 2. Melting of aluminum ingots: put pure aluminum ingots into the crucible of the pit furnace, heat the crucible for melting, and control the temperature of the molten aluminum between 710-730°C

[0041] 3. Add the master alloy: when the temperature of the aluminum liquid...

Embodiment 3

[0047] 50kgAl-4Si-2.5Mg-0.4Zn-0.08Sr high thermal conductivity die-casting aluminum alloy, that is, the composition content of the aluminum alloy is: 5wt.%Si, 3%wt.%Mg, 0.5%Zn, 0.1wt.%Sr, and the rest is Aluminum and other impurity elements are less than 0.005%.

[0048] 1. Ingredients and cleaning of the crucible: According to the amount of alloy to be smelted, the mass of the added alloy is calculated after considering the burning loss rate. If the surface is greasy, it needs to be cleaned, and the alloy ingot needs to be dried in an oven. The crucible should be cleaned and dried to prevent the influence of the residual material from the last smelting on the ratio of alloying elements.

[0049] 2. Melting of aluminum ingots: put pure aluminum ingots into the crucible of the pit furnace, heat the crucible for melting, and control the temperature of the molten aluminum between 710-730°C

[0050] 3. Add the master alloy: when the temperature of the aluminum liquid reaches 710°...

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Abstract

The invention discloses high-heat-conductivity corrosion-resistant die-cast aluminum alloy. The high-heat-conductivity corrosion-resistant die-cast aluminum alloy comprises, by weight, 1.5%-5% of Si, 1.0%-3% of Mg, 0.01%-0.5% of Zn, 0.05%-0.1% of Sr and the balance aluminum and other impurity elements. The content of the other impurity elements is smaller than 0.005%. After pure aluminum is molten, corresponding intermediate alloy is added according to the composition proportion, refining is conducted at the temperature of 750 DEG C by means of a specialized refining agent, the temperature is decreased to 730 DEG C after stirring is conducted sufficiently, and standing is conducted for 10 min. An Al-Ti-B modificator is used for modification. According to the high-heat-conductivity corrosion-resistant die-cast aluminum alloy, at the temperature of 20 DEG C, the heat conductivity coefficient is 175-190 W/mk, the tensile strength of a die casting ranges from 170 MPa to 200 MPa, the yield strength ranges from 130 MPa to 145 MPa, the ductility is 2%-4%, and the high-heat-conductivity corrosion-resistant die-cast aluminum alloy can be applied to structural components, having high requirements for the heat conductivity coefficients and the corrosion resistance of materials, in the industries such as the automobile industry and the communication industry. Compared with conventional AD12 alloy, the high-heat-conductivity corrosion-resistant die-cast aluminum alloy has remarkable advantages on the aspect of the heat conductivity coefficient.

Description

technical field [0001] The invention relates to a novel aluminum alloy with good thermal conductivity, high strength, corrosion resistance and suitable for die-casting and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] With the demand for energy saving, emission reduction and green low carbon, the automobile and communication industries have put forward higher and higher demands for lightweight materials and technologies. Die casting is the most commonly used casting process for the production of spare parts for the automotive and communication industries. Aluminum-magnesium alloy components in the communication, electronics, and automotive industries are all developing in the direction of thinner walls, high thermal conductivity, and corrosion resistance, which provides an opportunity for the development of new aluminum alloy materials. [0003] In the communication industry, with the development of 3G and 4G communic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C21/02C22C21/08C22C1/03
Inventor 周银鹏汪时宜谌晓勇罗云斌赵华曾小勤
Owner 苏州慧驰轻合金精密成型科技有限公司
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