A multi-performance aluminum alloy and its rapid heat treatment process

A rapid heat treatment, aluminum alloy technology, applied in the field of non-ferrous metal aluminum-based alloys, can solve the problems of soft quality, long heat treatment process time, etc., to achieve improved wear resistance, shorten the time of general heat treatment process, and good wear resistance properties Effect

Active Publication Date: 2020-12-29
上海伊泰科钢球有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem that the existing heat treatment process of A356 alloy is too long and the quality is soft, and provides a multi-performance aluminum alloy and its rapid heat treatment process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment prepares the alloy according to the following steps:

[0027] Step 1: Preparation of Alloy Ingot

[0028] (1) Ingredients: Weigh pure Al, Al-Si master alloy and master alloy of other elements according to Si 6%, Mg 0.3%, Ti 0.1%, Sr 0.011%, Cr 1%, B1% mass percentage.

[0029] (2) Melting: first add the Al-Si master alloy and pure aluminum into the crucible preheated to 300°C, heat up to 750°C with the furnace, and keep it warm for 20 minutes after melting; wrap the master alloy with aluminum foil and add it to the melt, After melting, keep it warm for 10 minutes, stir it after it is completely melted, and let it stand for 10 minutes.

[0030] (3) Refining: adjust the temperature to 720°C, quickly skim off the scum on the surface of the melt with a slag skimmer, and use a bell jar to remove the refining agent (C 2 Cl 6 , accounting for 0.6% of the total amount) placed at the bottom of the melt, refined and degassed, left to stand for 10-20 minutes to ...

Embodiment 2

[0037] This embodiment prepares the alloy according to the following steps:

[0038] Step 1: Preparation of Alloy Ingot

[0039] (1) Ingredients: Weigh pure Al, Al-Si master alloy and master alloy of other elements according to Si 7%, Mg 0.35%, Ti 0.1%, Sr 0.011%, Cr 2%, B 2% mass percentage.

[0040] (2) Melting: first add the Al-Si master alloy and pure aluminum into the crucible preheated to 300°C, heat up to 750°C with the furnace, and keep it warm for 20 minutes after melting; wrap the master alloy with aluminum foil and add it to the melt, After melting, keep it warm for 10 minutes, stir it after it is completely melted, and let it stand for 10 minutes.

[0041] (3) Refining: adjust the temperature to 720°C, quickly skim off the scum on the surface of the melt with a slag skimmer, and use a bell jar to remove the refining agent (C 2 Cl 6 , accounting for 0.6% of the total amount) placed at the bottom of the melt, refined and degassed, left to stand for 10-20 minutes t...

Embodiment 3

[0048] This embodiment prepares the alloy according to the following steps:

[0049] Step 1: Preparation of Alloy Ingot

[0050] (1) Ingredients: Weigh pure Al, Al-Si master alloy and master alloy of other elements according to Si 7%, Mg 0.35%, Ti 0.15%, Sr 0.012%, Cr 2%, B 2% mass percentage.

[0051] (2) Melting: first add the Al-Si master alloy and pure aluminum into the crucible preheated to 300°C, heat up to 750°C with the furnace, and keep it warm for 20 minutes after melting; wrap the master alloy with aluminum foil and add it to the melt, Keep warm for 10 minutes after melting. Stir after all melted, and let it stand for 10 minutes.

[0052] (3) Refining: adjust the temperature to 720°C, quickly skim off the scum on the surface of the melt with a slag skimmer, and use a bell jar to remove the refining agent (C 2 Cl 6 , accounting for 0.6% of the total amount) placed at the bottom of the melt, refining and degassing. Let it stand for 10-20 minutes to keep warm, and...

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Abstract

The invention discloses a multifunctional aluminum alloy and a quick thermal treatment process thereof. The multifunctional aluminum alloy is prepared from the following components in percent by mass:6-8% of Si, 0.3-0.4% of Mg, 0.1-0.2% of Ti, 1-3% of Cr, 1-3% of B and 0.011-0.013% of Sr. The multifunctional aluminum alloy after quick thermal treatment reaches performance of an existing A356 product aluminum alloy in strength, hardness, ductility and the like, and the generated CrB2 hard particles are widely distributed in an aluminum matrix, so that the alloy has a good wear-resistant attribute and has wider potential applications. In addition, compared with the current universal A356 alloy thermal treatment process at home and abroad, the time of the used thermal treatment technology isshortened by over 8 hours greatly, so that the multifunctional aluminum alloy and the quick thermal treatment process thereof are of considerable economic significance.

Description

technical field [0001] The invention belongs to the technical field of aluminum-based alloys of non-ferrous metals, and in particular relates to a multi-performance aluminum alloy and a rapid heat treatment process thereof. Background technique [0002] Aluminum alloy is the most widely used material in the field of non-ferrous metals. Various grades of aluminum alloys are used in various industries, and A356 aluminum alloy is one of them. However, the heat treatment process for this alloy at home and abroad is usually more than 8 hours for solid solution and more than 6 hours for aging. The time is too long, which greatly increases the production cost of the enterprise. Some enterprises reduce the time of heat treatment in order to improve efficiency, but this often leads to the failure of product performance to meet the standard and remanufacturing. Some enterprises even only select some qualified products as experimental samples, and put products with low pass rate into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22F1/043
CPCC22C21/02C22F1/002C22F1/043
Inventor 杜晓东董浩张壮庄鹏程雷璇璇
Owner 上海伊泰科钢球有限公司
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