Preparation method of cast aluminium alloy with high heat conductivity

A technology of casting aluminum alloy and high thermal conductivity, applied in the field of casting, can solve the problems of low thermal conductivity of cast aluminum alloy, unable to meet the development needs of automobiles, etc., and achieve the effects of improving process performance, increasing strength, and improving thermal conductivity.

Inactive Publication Date: 2015-09-02
LIUZHOU BAITIAN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing cast aluminum alloys with high thermal conductivity, whic...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation method of the high thermal conductivity cast aluminum alloy of this embodiment includes the following steps:

[0017] A. The alloy is prepared according to the following weight percentage raw materials: Si0.35%, Mn0.58%, Mg0.6%, Fe0.08%, Cu0.05%, Zn0.04%, Ti0.2%, Nb0. 09%, Ce4.4%, Zr0.09%, Sc0.06%, the total weight of other impurities is less than 0.1%, the balance is Al;

[0018] B. First heat the graphite crucible to 350-400°C in a resistance furnace, then melt the pure aluminum ingot into molten aluminum. When the temperature of the molten aluminum reaches 750-780°C, add Si and Mn to the molten aluminum to melt sequentially. Then the temperature is reduced to 680-720°C, and Mg is completely pressed into the alloy liquid;

[0019] C. Put Sc into the alloy liquid in the graphite crucible, stir under the protection of argon, then add the remaining raw materials, after the melting is complete, stir for 4-6 minutes;

[0020] D. Remove scum, refining at 770-780°C,...

Embodiment 2

[0024] The preparation method of the high thermal conductivity cast aluminum alloy of this embodiment includes the following steps:

[0025] A. The alloy is prepared according to the following raw materials by weight percentage: Si0.5%, Mn0.3%, Mg0.8%, Fe0.15%, Cu0.08%, Zn0.03%, Ti0.05%, Nb0. 06%, Ce4.2%, Zr0.06%, Sc0.03%, the total weight of other impurities is less than 0.1%, the balance is Al;

[0026] B. First heat the graphite crucible to 350-400°C in a resistance furnace, then melt the pure aluminum ingot into molten aluminum. When the temperature of the molten aluminum reaches 750-780°C, add Si and Mn to the molten aluminum to melt sequentially. Then the temperature is reduced to 680-720°C, and Mg is completely pressed into the alloy liquid;

[0027] C. Put Sc into the alloy liquid in the graphite crucible, stir under the protection of argon, then add the remaining raw materials, after the melting is complete, stir for 4-6 minutes;

[0028] D. Remove scum, refining at 770-780°...

Embodiment 3

[0032] The preparation method of the high thermal conductivity cast aluminum alloy of this embodiment includes the following steps:

[0033] A. The alloy is prepared according to the following weight percentages of raw materials: Si0.2%, Mn0.8%, Mg0.5%, Fe0.2%, Cu0.04%, Zn0.06%, Ti0.01%, Nb0. 08%, Ce4.6%, Zr0.12%, Sc0.08%, the total weight of other impurities is less than 0.1%, the balance is Al;

[0034] B. First heat the graphite crucible to 350-400°C in a resistance furnace, then melt the pure aluminum ingot into molten aluminum. When the temperature of the molten aluminum reaches 750-780°C, add Si and Mn to the molten aluminum to melt sequentially. Then the temperature is reduced to 680-720°C, and Mg is completely pressed into the alloy liquid;

[0035] C. Put Sc into the alloy liquid in the graphite crucible, stir under the protection of argon, then add the remaining raw materials, after the melting is complete, stir for 4-6 minutes;

[0036] D. Remove scum, refining at 770-780°...

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Abstract

The invention discloses a preparation method of a cast aluminium alloy with high heat conductivity, relating to the technical field of casting. The method comprises the following steps: preparing raw materials of the alloy; firstly oppressively heating a graphite crucible to 350-400 DEG C in a resistance furnace, then melting a pure aluminium ingot to form molten aluminium, adding Si and Mn to the molten aluminium when the temperature of the molten aluminium is 750-780 DEG C, melting Si and Mn in sequence, then reducing the temperature to 680-720 DEG C and pressing Mg in the alloy liquid entirely; putting Sc in the alloy liquid in the graphite crucible, stirring the alloy liquid under the protection of argon, then adding the remaining raw materials and stirring the materials for 4-6 minutes after the remaining raw materials are completely molten; removing dross, refining at 770-780 DEG C, stirring for 20-30 minutes, and then slagging off and degassing; carrying out blast furnace component analysis, and then casting after the components are qualified. The problems that the existing cast aluminium alloys have lower heat conductivity and can not meet the development requirements of automobiles are solved by adopting the preparation method.

Description

Technical field [0001] The invention relates to the field of casting technology, in particular to a method for preparing high thermal conductivity cast aluminum alloy. Background technique [0002] Aluminum alloy is a common lightweight metal material. It is widely used in industries such as automobiles, ships, aerospace, machinery, and communications. It has the characteristics of good processing performance, light weight, and energy saving. With the continuous development of the automobile industry, the requirements for automobile lightweight and low energy consumption have become a major trend in the automobile manufacturing industry, and the demand for aluminum alloys as the first material for lightweighting in automobiles has also continued to expand. Most of the aluminum alloy parts used in automobiles are formed by casting. Compared with other processing methods, casting has high metal utilization rate and high dimensional accuracy. It can produce parts with complex shapes...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/02
Inventor 谭皓原
Owner LIUZHOU BAITIAN MACHINERY
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