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A kind of processing method of aluminum-silicon alloy modification agent

The technology of an aluminum-silicon alloy and a processing method is applied in the processing field of the aluminum-silicon alloy modifier, which can solve the problems of large size of the second phase, complicated preparation process, etc., so as to ensure long-term effect, simple processing method and good versatility. Effect

Active Publication Date: 2019-09-27
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a processing method for an aluminum-silicon alloy modifier in order to solve the problem that the existing modifier preparation process is complex and the size of the second phase in the prepared modifier is relatively large

Method used

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  • A kind of processing method of aluminum-silicon alloy modification agent
  • A kind of processing method of aluminum-silicon alloy modification agent
  • A kind of processing method of aluminum-silicon alloy modification agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Aluminum and strontium were added to the graphite crucible at a mass ratio of 9.0:1.0 (wt%), put into a heating furnace for melting, protected by argon, the melting temperature was 750°C, and kept for 60 minutes. Then, pour it into a water-cooled copper mold and cast it into an ingot, and the casting is cooled to 50°C and taken out;

[0035] Heating the casting to 500°C for rolling, keeping the temperature at 500°C during the rolling process, with a single-pass deformation of 10%, until the plate with a deformation of 90% of the casting is quickly cooled to room temperature to obtain a modified aluminum-silicon alloy agent.

[0036] The grain size of the second phase of the product prepared in Example 1 is obviously reduced, and the average grain size is less than 10 μm according to statistics.

Embodiment 2

[0038] Aluminum and strontium were added to the graphite crucible at a mass ratio of 9.0:1.0 (wt%), put into a heating furnace for melting, protected by argon, the melting temperature was 800°C, and kept for 60 minutes. Then, pour it into a water-cooled copper mold and cast it into an ingot, and the casting is cooled to 50°C and taken out;

[0039] Heating the casting to 500°C for rolling, keeping the temperature at 500°C during the rolling process, with a single-pass deformation of 10%, until the plate with a deformation of 90% of the casting is quickly cooled to room temperature to obtain a modified aluminum-silicon alloy agent.

[0040] The grain size of the second phase of the product prepared in Example 2 is obviously reduced, and the average grain size is less than 10 μm according to statistics.

[0041] figure 1 is the microstructure picture of Al-Si alloy modifier prepared by traditional method, figure 1 It can be seen that the grain size is large, and the grain len...

Embodiment 3

[0046] Aluminum and strontium were added to the graphite crucible at a mass ratio of 9.0:1.0 (wt%), put into a heating furnace for melting, protected by argon, the melting temperature was 850°C, and kept for 60 minutes. Then, pour it into a water-cooled copper mold and cast it into an ingot, and the casting is cooled to 50°C and taken out;

[0047]Heating the casting to 500°C for rolling, keeping the temperature at 500°C during the rolling process, with a single-pass deformation of 10%, until the plate with a deformation of 90% of the casting is quickly cooled to room temperature to obtain a modified aluminum-silicon alloy agent.

[0048] The grain size of the second phase of the product prepared in Example 3 is obviously reduced, and the average grain size is less than 10 μm according to statistics.

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Abstract

The invention provides a processing method of an aluminium-silicon alloy modifier, and belongs to the field of processing methods of aluminium-silicon alloy refining modifiers. According to the method, aluminium and strontium are added into a smelting furnace for smelting, and then cast into an ingot, and after cooling is conducted, a casting is obtained; the obtained casting is heated to 450-600DEG C for rolling, in a rolling process, the temperature is maintained at 450-600 DEG C, single pass deformation is 10%-20% until a panel with casting deformation of 80%-95% is obtained, and a coppermould is used for conducting water-cooling on the panel until the panel is at a normal temperature, so that the aluminium-silicon alloy modifier is obtained. In the aluminium-silicon alloy modifier, the size of a second phase is subjected to gradient change, and is distributed normally, not only can a good deformation effect be achieved in a short time, but also the good deformation effect can bemaintained for a long time, long residual action of the modifier is guaranteed, and the processing technology method is simple and convenient, and has good universality.

Description

technical field [0001] The invention belongs to the field of processing methods of aluminum-silicon alloy modifiers, and in particular relates to a processing method of aluminum-silicon alloy modifiers. Background technique [0002] Aluminum-silicon alloy has good casting performance, small linear expansion coefficient, good wear resistance and other mechanical and physical properties. It is used to manufacture complex-shaped castings in automobiles, shipbuilding, aviation, aerospace, etc., and is currently used in industry. The widest range of cast aluminum alloys. [0003] With the development of modern industry, higher requirements are put forward for the casting performance and strength of aluminum-silicon alloys. Therefore, in order to improve the castability of the Al-Si alloy, the silicon content in the Al-Si alloy will increase accordingly. However, with the increase of silicon content, although the casting performance is improved, more coarse silicon phases will a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/02C22F1/04C22C21/04
Inventor 孙世成金石开陈术林颜国昊谷云峰朱天儒宫文彪
Owner CHANGCHUN UNIV OF TECH
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