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Method for refining and strengthening near-eutectic aluminum-silicon alloy through metal glass

A technology of metallic glass and aluminum-silicon alloy, which is applied in the field of forming and processing of aluminum alloy and aluminum alloy parts, can solve the problems of insignificant structure refinement effect of Al-Si alloy, inability of aluminum alloy to meet industrial needs, and purity requirements of aluminum alloy Extremely high-level problems, to achieve huge industrial application potential and value, significant strengthening effect, and the effect of improving room temperature strength and fracture strain

Inactive Publication Date: 2018-04-13
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the strengthening agents of mainstream aluminum alloys such as: Al-Ti-B, Al-Ti-C, Al-Ti-C-B and other inoculants all contain Ti element, which is suitable for inoculation (deterioration) of alloys with silicon content greater than 4% in aluminum alloys. ) treatment, Ti elements will react with Si elements to form TiSi, TiSi 2 and Ti 5 Si 3 Al-B modifiers have excellent effects on refining the structure of Al-Si alloy systems that do not contain Ti, but the Ti impurity content in the alloy is higher than When it is 0.04%, it will have the same poisoning effect as Al-Ti-B and other modifiers. The scope of application to the alloy system is narrow, and the purity of the aluminum alloy is extremely high, so the scope of application is limited
Other modifiers or inoculants such as: Al-Sr, Al-Ce, Al-La, etc. contain rare earths, the cost is high, and the effect on the refinement of Al-Si alloy structure is not significant
Existing ways of strengthening aluminum alloys cannot meet industrial needs

Method used

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  • Method for refining and strengthening near-eutectic aluminum-silicon alloy through metal glass
  • Method for refining and strengthening near-eutectic aluminum-silicon alloy through metal glass
  • Method for refining and strengthening near-eutectic aluminum-silicon alloy through metal glass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The method for refining and strengthening the near-eutectic aluminum-silicon alloy using metallic glass in this embodiment includes the following steps:

[0044] Step 1, preparation of multi-element metal glass alloy ingot:

[0045] 1a. Polish the oxide film on the surface of Ni, Nb and Ti, and then press Ni 60 Nb 25 Ti 10 The atomic percentage ratio is prepared and placed in a beaker filled with absolute alcohol to prevent its oxidation;

[0046] 1b. Stack the prepared Ni, Nb, and Ti in the water-cooled copper mold crucible according to the melting point from low to high;

[0047] 1c. Cover the furnace cover and vacuumize twice before the formal smelting, each time the vacuum reaches 6.0×10 -3 Pa and filled with high-purity Ar gas to dilute residual oxygen;

[0048] 1d. After two times of vacuuming, fill it with high-purity Ar gas with an atmospheric pressure of 0.05MPa to dilute the residual oxygen in the furnace;

[0049] 1e. Turn on the magnetic stirring to sm...

Embodiment 2

[0074] The method for refining and strengthening the near-eutectic aluminum-silicon alloy using metallic glass in this embodiment includes the following steps:

[0075] Step 1, preparation of multi-element metal glass alloy ingot:

[0076] 1a. Polish the oxide film on the surface of Ni, Nb and Ti, and then press Ni 60 Nb 25 Ti 10 The atomic percentage ratio is prepared and placed in a beaker filled with absolute alcohol to prevent its oxidation;

[0077] 1b. Stack the prepared Ni, Nb, and Ti in the water-cooled copper mold crucible according to the melting point from low to high;

[0078] 1c. Cover the furnace cover and vacuumize twice before the formal smelting, each time the vacuum reaches 6.0×10 -3 Pa and filled with high-purity Ar gas to dilute residual oxygen;

[0079] 1d. After two times of vacuuming, fill it with high-purity Ar gas with an atmospheric pressure of 0.06MPa to dilute the residual oxygen in the furnace;

[0080] 1e. Turn on the magnetic stirring to sm...

Embodiment 3

[0105] The method for refining and strengthening the near-eutectic aluminum-silicon alloy using metallic glass in this embodiment includes the following steps:

[0106] Step 1, preparation of multi-element metal glass alloy ingot:

[0107] 1a. Polish the oxide film on the surface of Ni, Nb and Ti, and then press Ni 60 Nb 25 Ti 10 The atomic percentage ratio is prepared and placed in a beaker filled with absolute alcohol to prevent its oxidation;

[0108] 1b. Stack the prepared Ni, Nb, and Ti in the water-cooled copper mold crucible according to the melting point from low to high;

[0109] 1c. Cover the furnace cover and vacuumize twice before the formal smelting, each time the vacuum reaches 6.0×10 -3 Pa and filled with high-purity Ar gas to dilute residual oxygen;

[0110] 1d. After two times of vacuuming, fill it with high-purity Ar gas with an atmospheric pressure of 0.05MPa to dilute the residual oxygen in the furnace;

[0111] 1e. Turn on the magnetic stirring to sm...

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Abstract

The invention discloses a method for refining and strengthening a near-eutectic aluminum-silicon alloy through metal glass. The method comprises the six steps including multielement metal glass alloyingot preparing, metal glass thin strip preparing, metal glass thin strip breaking, metal glass containing prefabricated block preparing, metal glass strengthened treatment aluminum alloy preparing, and heat treatment on the aluminum alloy strengthened through the metal glass. By adoption of the technical scheme, the steps are reasonable, the room-temperature and high-temperature toughness of thealuminum alloy is greatly improved while the structure is refined; particularly, the room-temperature strength and fracture strain of the aluminum alloy and the high-temperature yield strength and thetensile strength of the aluminum alloy are extremely improved; and strengthening is efficient, cost is low, and huge industrial application potentials and value are achieved.

Description

technical field [0001] The invention relates to the field of molding and processing of aluminum alloys and aluminum alloy parts, in particular to a method for refining and strengthening near-eutectic aluminum-silicon alloys by using metallic glass. Background technique [0002] In the fields of automobiles, ships, aerospace and other fields, the materials of many components (such as internal combustion engines, etc.) do not work at room temperature, but serve for a long time under high temperature conditions. Since temperature has a great influence on the performance of materials, it is of great practical significance to develop new lightweight high-temperature materials. With the advancement of lightweight technology for internal combustion engines, the proportion of aluminum alloy parts in engine parts is increasing year by year. Compared with cast iron, aluminum alloy has excellent thermal conductivity (about 3 times higher than that of cast iron), which is conducive to ...

Claims

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Application Information

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IPC IPC(8): C22C1/00C22C21/02C22F1/043
CPCC22C1/026C22C1/03C22C21/02C22F1/043C22C1/12
Inventor 邱丰段涛涛朱琳姜启川
Owner JILIN UNIV