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A kind of 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 low output, high price of rare earth elements, and high price

Active Publication Date: 2022-03-11
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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  • A kind of treatment-free aluminum alloy and preparation method thereof
  • A kind of treatment-free aluminum alloy and preparation method thereof
  • A kind of 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 method for preparing the above-mentioned treatment-free aluminum alloy casting includes the steps of:

[0044] S100 calculates the amount of required raw materials 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 satisfies: 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%, among which, the content ratio of Mn element to Mg element is 1.5~2.2;

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

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

Embodiment 1

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

[0051] (1) According to the alloy composition and stoichiometric ratio, calculate the amount of raw materials required, and use a 300kg resistance furnace to melt the molten aluminum so that the component content in the molten aluminum alloy 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, among them, Mn element and Mg element The content ratio is 1.54;

[0052] (2) When the temperature is stable at 720°C, start refining and degassing for 50 minutes. During the degassing process, add the modifying agent Al-10Sr master alloy and the super refiner TCB seed alloy, during which the refining and degassing is continued. Add modifiers and refiners during the degassing process;

[0053] (3) Stand still for 10 minutes after refining and degassing, and transfer to the side furnace of a 300T-Buh...

Embodiment 2

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

[0056] (1) Calculate the amount of required raw materials according to the alloy composition and stoichiometric ratio, and use a 300kg resistance furnace to melt the molten aluminum so that the content of the components in the molten aluminum alloy satisfies: 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 them, Mn element and Mg element The content ratio is 2.24;

[0057] (2) When the temperature is stable at 720°C, start refining and degassing for 50 minutes. During the degassing process, add the modifying agent Al-10Sr master alloy and the super refiner TCB seed alloy, during which the refining and degassing is continued. Add modifiers and refiners during the degassing process;

[0058] (3) Stand still for 10 minutes after refining and degassing, and transfer to the side furnace...

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Abstract

The invention discloses a treatment-free aluminum alloy and a preparation method thereof, comprising the following components in mass percentage: 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%, among which, The content ratio of Mn element and Mg element is 1.5-2.2. There is no need for heat treatment strengthening, and the elongation rate is increased while maintaining a certain strength, so that the obtained product can directly achieve the ideal performance in the cast 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 ultra-high vacuum and high-pressure casting of conventional parts because of their good casting properties. With the continuous improvement of automobile lightweight technology, due to its high strength and elongation, Silafont-36 alloy is particularly favored in the manufacture of structural parts that require extremely high safety performance such as car body frames and shock absorbing towers. In particular, the continuous innovation of ultra-high vacuum pressure casting technology and the increasing maturity of large-scale die-casting machine technology, as well as the rapid development needs of new energy vehicles, have made Silafont-36 alloy in the application of die-casting large-scal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/03C22C1/06
CPCC22C21/02C22C1/03C22C1/026C22C1/06
Inventor 贺艳阳许钢
Owner NINGBO HELI TECH CO LTD