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Treatment-free aluminum alloy and preparation method thereof

An aluminum alloy, treatment-free technology, applied in the field of treatment-free aluminum alloy and its preparation, can solve the problems of long-term use, high price, and high price of rare earth elements

Active Publication Date: 2022-01-14
NINGBO HELI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of rare earth elements is high and the output is small. For example, zirconium is widely used in semiconductor and other fields, and the price is getting higher and higher, so it cannot be used for a long time.

Method used

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  • Treatment-free aluminum alloy and preparation method thereof
  • Treatment-free aluminum alloy and preparation method thereof
  • Treatment-free aluminum alloy and preparation method thereof

Examples

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preparation example Construction

[0043] According to another aspect provided by the present invention, the preparation method of the above-mentioned treatment-free aluminum alloy casting comprises the steps:

[0044] S100 calculates the amount of raw materials required according to the alloy composition and stoichiometric ratio, and melts the ingredients to make aluminum alloy liquid, so that the component content in the aluminum alloy liquid meets: Si: 9.5%~11.5%, Fe: ≤ 0.25% , Mn: 0.4%~0.65%, Mg: 0.17%~0.5%, Cu: ≤0.05%, Sr: 0.02%~0.03%, Zn: 0.07%~0.1%, Ti: ≤0.2%, the balance is Al, and unavoidable impurity elements <0.15%, wherein the content ratio of Mn element and Mg element is 1.5~2.2;

[0045] S200 refining and degassing, adding modifier and refiner in the process of degassing;

[0046] After the S300 is refined and degassed, it is allowed to stand for a period of time, and then injected into the die-casting mold for vacuum die-casting to obtain thin-walled alloy castings. Therefore, the alloy casting...

Embodiment 1

[0050] A preparation method of a treatment-free aluminum alloy casting, comprising the steps:

[0051] (1) Calculate the amount of raw materials required according to the alloy composition and stoichiometric ratio, and use a 300kg resistance furnace to melt the aluminum liquid, so that the component content in the aluminum alloy liquid meets: Si: 9.5%, Fe: 0.25%, Mn: 0.4%, Mg: 0.26%, Cu: 0.05%, Sr: 0.02%, Zn: 0.1%, Ti: 0.2%, the balance is Al, and unavoidable impurity elements. The content ratio is 1.54;

[0052] (2) When the temperature is stable at 720 °C, the refining and degassing starts for 50 minutes. During the degassing process, the modifier Al-10Sr master alloy and the super refiner TCB seed alloy are added. Modifiers and refiners are added during the degassing process;

[0053] (3) After passing the refining and degassing, let it stand for 10 minutes. After the temperature of the molten aluminum is stabilized at 710 °C, it is transferred to the 300T-Buhler small pr...

Embodiment 2

[0055] A preparation method of a treatment-free aluminum alloy casting, comprising the steps:

[0056] (1) Calculate the amount of raw materials required according to the alloy composition and stoichiometric ratio, and use a 300kg resistance furnace to melt the aluminum liquid, so that the component content in the aluminum alloy liquid meets: Si: 11.5%, Fe: 0.15%, Mn: 0.65%, Mg: 0.29%, Cu: 0.05%, Sr: 0.03%, Zn: 0.07%, Ti: 0.2%, the balance is Al, and unavoidable impurity elements, among which, the difference between Mn element and Mg element is The content ratio is 2.24;

[0057] (2) When the temperature is stable at 720 °C, the refining and degassing starts for 50 minutes. During the degassing process, the modifier Al-10Sr master alloy and the super refiner TCB seed alloy are added. Modifiers and refiners are added during the degassing process;

[0058] (3) After passing the refining and degassing, let it stand for 10 minutes. After the temperature of the molten aluminum is...

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Abstract

The invention discloses a treatment-free aluminum alloy and a preparation method thereof. The treatment-free aluminum alloy comprises the following components including, by mass percent, 9.5%-11.5% of Si, not larger than 0.25% of Fe, 0.4%-0.65% of Mn, 0.17%-0.5% of Mg, not larger than 0.05% of Cu, 0.02%-0.03% of Sr, 0.07%-0.1% of Zn, not larger than 0.2% of Ti, the balance of Al and smaller than 0.15% of inevitable impurity elements, wherein the content ratio of the Mn element to the Mg element is 1.5-2.2. Therefore, heat treatment strengthening is not needed, the ductility is improved under the condition that certain strength is kept, and the obtained product can directly achieve ideal performance in a casting state.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a treatment-free aluminum alloy and a preparation method thereof. Background technique [0002] At present, Al-Si alloys such as Magcimal-59, Castasil-37 and Silafont-36 are widely used in UHV high pressure casting of conventional parts due to their good casting properties. With the continuous improvement of automotive lightweight technology, due to its high strength and elongation, Silafont-36 alloy is particularly favored in the manufacture of structural parts such as body frames and shock towers that require extremely high safety performance. In particular, the continuous innovation of ultra-high vacuum pressure casting technology, the growing maturity of large-scale die-casting machine technology, and the rapid development of new energy vehicles have made Silafont-36 alloys in die-casting large-size, complex structures, and ultra-thin wall thickness. Brilliant in the mid...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03C22C1/06
CPCC22C21/02C22C1/03C22C1/026C22C1/06
Inventor 贺艳阳许刚
Owner NINGBO HELI TECH CO LTD