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High-strength die-casting aluminum alloy and processing technology thereof

A technology of casting aluminum alloy and processing technology, applied in the field of high-strength die-casting aluminum alloy and its processing technology, can solve the problems of thin natural oxide film thickness, unsuitable for heat treatment, uneconomical, etc., to improve corrosion resistance, improve mechanical performance and anti-corrosion performance, the effect of improving mechanical properties

Inactive Publication Date: 2022-06-03
海安宏宇合金材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, die castings are not suitable for heat treatment, and it is easy to cause quality risks such as deformation and foaming of castings, and it is not economical and the purpose of the country's advocacy of energy saving and emission reduction
[0003] Moreover, although the aluminum alloy is easy to form a dense natural oxide film, which has a certain protective effect, the thickness of the natural oxide film is extremely thin, and the solution will corrode in humid air.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

Step 1: take the primary aluminum for heating and melting, the melting temperature is 685 ℃; add metal silicon, heat up and melt, the melting temperature is 765 ℃; at 740 ℃, add copper, iron, magnesium, manganese, melt at 740 ℃, static Set for 7min to obtain a melt.

[0019] Step 2: Refining treatment: compress ammonium chloride and perchloroethane into blocks, add them into the melt, set the melt temperature to 740°C, degas for 1.5 minutes, and let stand for 15 minutes.

[0020] Step 3: heating the ceramic foam to 190°C, and filtering when the aluminum alloy melt temperature reaches 780°C.

[0021] Step 4: Take the primary aluminum for heating and melting, and the melting temperature is 685°C; add rare earth La, rare earth Yb, Al-Ti-B refiner, Ti, Mo, stir for 1.5 hours, keep the temperature for 65 minutes, and perform intermittent ultrasonic treatment. The temperature of the aluminum melt is lowered to 710° C., refining treatment, heating the ceramic foam to 200° C., filteri...

Embodiment 2

Step 1: Take the primary aluminum for heating and melting, the melting temperature is 650 ℃; add metal silicon, heat up and melt, the melting temperature is 730 ℃; at 730 ℃, add copper, iron, magnesium, manganese, melt at 730 ℃, static Set for 5min to obtain a melt.

[0026] Step 2: Refining treatment: compress ammonium chloride and perchloroethane into blocks, add them into the melt, set the melt temperature to 730°C, degas for 1 min, and let stand for 10 min.

[0027] Step 3: heating the ceramic foam to 190°C, and filtering when the aluminum alloy melt temperature reaches 770°C.

[0028]Step 4: Take the primary aluminum for heating and melting, and the melting temperature is 650°C; add rare earth La, rare earth Yb, Al-Ti-B, Ti, Mo, stir for 1 hour, keep the temperature for 60 minutes, perform intermittent ultrasonic treatment, and adjust the temperature of the primary aluminum melt to The temperature is lowered to 700° C., refining treatment, heating the ceramic foam to 190°...

Embodiment 3

Step 1: Take primary aluminum for heating and melting, the melting temperature is 720 °C; add metal silicon, heat up and melt, and the melting temperature is 800 °C; at 750 °C, add copper, iron, magnesium, manganese, and melt at 750 °C, static Set for 10min to obtain a melt.

[0033] Step 2: Refining treatment: Compress ammonium chloride and perchloroethane into blocks, add them into the melt, set the melt temperature to 750°C, degas for 2 minutes, and let stand for 20 minutes.

[0034] Step 3: heating the ceramic foam to 200°C, and filtering when the aluminum alloy melt temperature reaches 790°C.

[0035] Step 4: Take the primary aluminum for heating and melting, and the melting temperature is 720°C; add rare earth La, rare earth Yb, Al-Ti-B, Ti, Mo, stir for 2 hours, keep the temperature for 70 minutes, perform intermittent ultrasonic treatment, and adjust the temperature of the primary aluminum melt to The temperature is lowered to 720° C., refining treatment, heating the c...

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Abstract

The invention discloses a high-strength die-casting aluminum alloy and a processing technology thereof. The prepared aluminum alloy material comprises aluminum, silicon, iron, copper, manganese and magnesium. La and Yb are added, the prepared rare earth aluminum alloy is good in quality and compact in structure through intermittent ultrasonic treatment, aluminum oxide, magnesium oxide, lanthanum oxide, ytterbium oxide and other inclusions are removed through ceramic foam filtration, the rare earth aluminum alloy prepared through the method is added into an aluminum alloy melt, and the rare earth aluminum alloy is obtained. And the mechanical property of the aluminum alloy is obviously improved. And meanwhile, the aluminum alloy is coated with a hydrotalcite film layer prepared from vanillin L-aspartic acid disodium salt, the film layer is modified through perfluorooctyltriethoxysilane, and the corrosion resistance of the aluminum alloy is improved.

Description

technical field [0001] The invention relates to the technical field of alloy smelting, in particular to a high-strength die-casting aluminum alloy and a processing technology thereof. Background technique [0002] Aluminum alloys are widely used because of their light weight, easy processing and excellent economy. To meet the standard, the current mainstream die-casting aluminum alloys need to be heat treated to increase the elongation to more than 10%. In fact, die castings are not suitable for heat treatment, and are prone to quality risks such as deformation and blistering of the castings. [0003] Moreover, although the aluminum alloy is easy to form a dense natural oxide film, which has a certain protective effect, the thickness of the natural oxide film is extremely thin, and the solution will corrode in humid air. How to improve the corrosion resistance and mechanical ability of aluminum alloys is very important without the need for heat treatment. [0004] The inv...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C21/02C22B9/02C22B21/06B22D17/00C09D1/00C09D5/08
CPCC22C1/026C22C1/03C22C21/02C22B9/026C22B21/066B22D17/00B22D31/002C09D1/00C09D5/08Y02P10/20
Inventor 颜宏庆王文伟
Owner 海安宏宇合金材料有限公司
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