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High-strength and high-toughness die-casting aluminum alloy for automobile structural part and preparation method and application of high-strength and high-toughness die-casting aluminum alloy for automobile structural part

A technology for casting aluminum alloys and structural parts, applied in the field of aluminum alloys for vehicles, can solve the problems of large usage and high usage costs, and achieve the effects of development promotion, good climbing performance, and excellent mechanical properties.

Inactive Publication Date: 2021-01-05
苏州有色金属研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the aluminum alloy disclosed in this technical solution has more elemental components, among which Zr, Ti and other metal elements with high cost are used, and the amount of Sr is also relatively large. Although its various performance indicators are relatively high, But its cost is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-strength, high-toughness die-casting aluminum alloy for automotive structural parts: the composition of the aluminum alloy includes: Si 8.0%, Mn 1.2%, Mg 0.1%, Sr 0.2%, Fe 0.005%, and the balance is Al and Unavoidable trace impurities, wherein, the single element content in trace impurities is ≤0.1%, and the total amount of trace impurities is ≤0.3%.

[0030] Further, the raw materials used are pure aluminum, aluminum-silicon master alloy, aluminum-manganese master alloy, aluminum-strontium master alloy, and pure magnesium.

[0031] Furthermore, unavoidable trace impurities include Cu, P, Ti, Ca, and Zn.

[0032] A method for preparing high-strength and high-toughness die-casting aluminum alloys for automotive structural parts: the preparation steps are:

[0033] a. Take pure aluminum, aluminum-silicon master alloy, aluminum-manganese master alloy, aluminum-strontium master alloy and pure magnesium according to the element content, and preheat;

[0034] b. Put ...

Embodiment 2

[0046] A high-strength, high-toughness die-casting aluminum alloy for automotive structural parts: the composition of the aluminum alloy includes: Si 12.0%, Mn0.4%, Mg 0.6%, Sr 0.01%, Fe 0.25%, and the balance is Al and Unavoidable trace impurities, wherein, the single element content in trace impurities is ≤0.1%, and the total amount of trace impurities is ≤0.3%.

[0047] Further, the composition also includes 0.2% Sc.

[0048] Further, the raw materials used are electrolytic aluminum, industrial silicon, manganese agent, aluminum strontium master alloy, pure magnesium, and aluminum scandium master alloy.

[0049] Furthermore, unavoidable trace impurities include Cu, P, Ti, Ca, and Zn.

[0050] A method for preparing high-strength and high-toughness die-casting aluminum alloys for automotive structural parts: the preparation steps are:

[0051] a. Take electrolytic aluminum, industrial silicon, manganese agent, aluminum-strontium master alloy and pure magnesium according to...

Embodiment 3

[0064] A high-strength, high-toughness die-casting aluminum alloy for automotive structural parts: the composition of the aluminum alloy includes: Si 10.0%, Mn0.8%, Mg 0.35%, Sr 0.1%, Fe 0.1%, and the balance is Al and Unavoidable trace impurities, wherein, the single element content in trace impurities is ≤0.1%, and the total amount of trace impurities is ≤0.3%.

[0065] Further, the composition also includes 0.005% Sc.

[0066] Further, the raw materials used are pure aluminum, fast-melting silicon, aluminum-manganese master alloy, aluminum-strontium master alloy, pure magnesium, and aluminum-scandium master alloy.

[0067] Furthermore, unavoidable trace impurities include Cu, P, Ti, Ca, and Zn.

[0068] A method for preparing high-strength and high-toughness die-casting aluminum alloys for automotive structural parts: the preparation steps are:

[0069] a. Take pure aluminum, fast-melting silicon, aluminum-manganese master alloy, aluminum-strontium master alloy, and pure ...

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Abstract

The invention discloses a high-strength and high-toughness die-casting aluminum alloy for an automobile structural part and a preparation method and application of the high-strength and high-toughnessdie-casting aluminum alloy for the automobile structural part. The high-strength and high-toughness die-casting aluminum alloy for the automobile structural part comprises the components of, 8.0%-12.0% of Si, 0.4%-1.2% of Mn, 0.1%-0.6% of Mg, 0.01%-0.2% of Sr, 0.005%-0.25% of Fe, 0.005%-0.2% of Sc and the balance Al and inevitable trace impurities, the content of a single element in the trace impurities is smaller than or equal to 0.1%, and the total amount of the trace impurities is smaller than or equal to 0.3%. The high-strength and high-toughness die-casting aluminum alloy is applied to the automobile stress structural part, the automobile stress structural part comprises an auxiliary frame and a shock absorber support, compared with a traditional aluminum alloy die-casting material and a mainstream Silafot36 aluminum alloy, the high-strength and high-toughness die-casting aluminum alloy has more excellent mechanical properties at a lower cost, is excellent in yield strength, tensile strength and elongation, is beneficial to the automobile industry to obtain higher performance at a lower cost, and is beneficial to the light weight of an automobile.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys for automobiles, and in particular relates to a high-strength and high-toughness die-casting aluminum alloy for automobile structural parts, a preparation method and application thereof. Background technique [0002] Structural parts in automobiles, such as subframes, shock absorber supports, rear cover frames, A / B pillars, etc., are load-bearing parts and are closely related to automobile safety. This kind of structural parts usually has the characteristics of complex thin wall and large size. Because the reliable safety of the car must be guaranteed during driving, these stressed structural parts require high strength, especially yield strength and excellent elongation. Most of the traditional automotive structural parts are made of steel and produced by stamping, forging, welding, riveting and other processes. In the automobile market, the competition is becoming more and more fierce....

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/03B62D29/00F16F15/02
CPCB62D29/008C22C1/026C22C1/03C22C21/02F16F15/02
Inventor 张俊超钟鼓邱楚路通李虎田周玉立
Owner 苏州有色金属研究院有限公司
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