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A kind of metamorphic treatment method of high-silicon aluminum alloy

A high-silicon aluminum alloy and metamorphic treatment technology, applied in the field of alloy materials, can solve the problems of deterioration of modifier effect, long casting time, and growth of silicon phase aggregation, and achieve stable metamorphic effect and reduce residence time.

Active Publication Date: 2015-11-18
SOUTHWEST ALUMINUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to large-scale production component analysis and long casting time, long-term heat preservation at conventional temperatures will cause the silicon phase to aggregate and grow, resulting in the decline of the effect of the modifier

Method used

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  • A kind of metamorphic treatment method of high-silicon aluminum alloy
  • A kind of metamorphic treatment method of high-silicon aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Use 4032 aluminum alloy with a silicon content of 11-13.5%, put 15wt% into a static furnace to melt and keep it at 660°C, put 85wt% into a melting furnace to melt, and rapidly heat up to 900°C at a rate of 3°C / min And keep it warm for 20 minutes, then pour the alloy in the smelting furnace into the standing furnace, stir evenly and cast.

[0038] The high-silicon aluminum alloy obtained after casting in embodiment 1 is carried out microstructure inspection, obtains its 500 times microstructure photo as follows figure 1 shown.

[0039] The structure and morphology of the 4032 aluminum alloy without heat treatment were tested, and the microstructure photos at 200 times were obtained as follows: figure 2 shown.

Embodiment 2

[0041] Use 4A11 aluminum alloy with a silicon content of 11.5~12.5%, put 15wt% into a static furnace to melt and keep it at 660°C, put 85wt% into a melting furnace to melt, and rapidly heat up to 900°C at a rate of 3°C / min And keep it warm for 20 minutes, then pour the alloy in the smelting furnace into the standing furnace, stir evenly and cast.

Embodiment 3

[0043] Use 4032 aluminum alloy with a silicon content of 11~13.5%, put 20wt% into a static furnace to melt and keep it at 660°C, put 80wt% into a melting furnace to melt, and rapidly heat up to 900°C at a rate of 3°C / min And keep it warm for 20 minutes, then pour the alloy in the smelting furnace into the standing furnace, stir evenly and cast.

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Abstract

The invention provides a modification method of high-silicon aluminum alloy, which comprises the following steps: heating to melt 10-20 wt% of high-silicon aluminum alloy, and keeping the low temperature of 660-700 DEG C; and heating to melt 80-90 wt% of high-silicon aluminum alloy, quickly heating to carry out superheating treatment, and pouring into the high-silicon aluminum alloy with low temperature to carry out casting. Compared with the prior art for modification by adding a modifier, the invention carries out modification on the high-silicon aluminum alloy by superheating treatment. In the superheating treatment state, the silicon atoms in the high-silicon aluminum alloy can not aggregate or grow, and therefore, the high-silicon aluminum alloy can use less or no modifier; and the high-silicon aluminum alloy subjected to superheating treatment and the high-silicon aluminum alloy with low temperature are mixed to carry out casting to shorten the retention time of normal temperature of the high-silicon aluminum alloy melt, thereby maintaining stable modification effect.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a modification treatment method for high-silicon aluminum alloys. Background technique [0002] Aluminum alloy with high silicon content is an important casting aluminum alloy. It has excellent properties such as small linear expansion coefficient, low density, wear resistance, heat resistance, and good dimensional stability. It is especially suitable for manufacturing lightweight, wear-resistant and high-temperature resistant It is an important processing material in aerospace, aviation, automobile, electronics and other industries. And because the content of aluminum element ranks first among the crustal metal elements, the density is only 2.72g / cm 3 , so that the density of the aluminum-based alloy is also small, and at the same time, silicon is added as the main alloying element of high-silicon aluminum alloy, which improves the casting performance of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/04C22C1/06B22D27/20
Inventor 田士
Owner SOUTHWEST ALUMINUM GRP