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High-strength and high-toughness die-casting aluminum-silicon alloy and preparation method thereof

A silicon alloy and tough pressure technology is applied in the field of high-strength and toughness die-casting aluminum-silicon alloy and its preparation. Effect

Active Publication Date: 2021-04-16
成都慧腾创智信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problems of existing die-casting aluminum-silicon alloys with poor mechanical properties, toughness, and subsequent heat treatment, and to provide a high-strength and toughness die-casting aluminum-silicon alloy and its preparation method

Method used

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  • High-strength and high-toughness die-casting aluminum-silicon alloy and preparation method thereof
  • High-strength and high-toughness die-casting aluminum-silicon alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A high-strength and tough die-casting aluminum-silicon alloy, the components of which are calculated by mass percentage: Si: 11.5%; Cu: 3%; Zn: 1.5%; Mg: 0.6%; B: 0.1%; La: 0.22%; Sr: 0.06%; Mn: 0.6%; Fe: 0.2%; Ti: 0.2%; the balance is Al.

[0033] The preparation method of the high-strength and tough die-casting aluminum-silicon alloy comprises the following steps:

[0034] (1) Material preparation: According to the set chemical composition, weigh industrial pure aluminum, crystalline silicon, Al-Mn master alloy, pure magnesium, pure zinc, Al-Cu master alloy, Al-Fe master alloy, Al- For 5Ti-B master alloy, Al-Sr master alloy, Al-La master alloy, etc., preheat the above-mentioned raw materials that have been weighed to 180°C for drying treatment.

[0035] (2) Melting aluminum ingots: Put the weighed industrial pure aluminum ingots into a melting furnace for melting. The melting temperature is 750°C.

[0036] (3) Melting: Add the weighed crystalline silicon and Al-Fe m...

Embodiment 2

[0041] A high-strength and tough die-casting aluminum-silicon alloy, the components of which are calculated by mass percentage: Si: 10.5%; Cu: 2%; Zn: 1%; Mg: 0.5%; B: 0.07%; La: 0.14%; Sr: 0.06%; Mn: 0.6%; Fe: 0.18%; Ti: 0.2%; the balance is Al.

[0042] The preparation method is the same as in Example 1.

Embodiment 3

[0044] A high-strength and tough die-casting aluminum-silicon alloy, the components of which are calculated by mass percentage: Si: 9%; Cu: 1.5%; Zn: 0.7%; Mg: 0.4%; B: 0.04%; La: 0.1%; Sr: 0.04%; Mn: 0.6%; Fe: 0.11%; Ti: 0.25%; the balance is Al.

[0045] The preparation method is the same as in Example 1.

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Abstract

The invention discloses a high-strength and high-toughness die-casting aluminum-silicon alloy and a preparation method thereof. The high-strength and high-toughness die-casting aluminum-silicon alloy comprises the following components in percentage by mass: 8.5-11.5% of Si, 1.0-3.0% of Cu, 0.5-1.5% of Zn, 0.2-0.6% of Mg, 0.01-0.1% of B, 0.1-0.22% of La, 0.02-0.08% of Sr, 0.4-0.7% of Mn, not more than 0.2% of Fe, and the balance of Al and inevitable impurities. The high-strength and high-toughness die-casting aluminum-silicon alloy has relatively high strength and toughness, can be widely applied to automobiles, and especially can be applied to chassis and automobile body structural parts with high requirements for strength and toughness.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high-strength and tough die-casting aluminum-silicon alloy and a preparation method thereof. Background technique [0002] With the development of automobile electrification, the requirements for the lightweight of automobile materials are getting higher and higher. Compared with traditional automotive materials (such as steel, cast iron, etc.), aluminum alloy has the characteristics of high specific strength, high specific stiffness, good shock absorption, excellent corrosion resistance and good recycling, and has attracted widespread attention. Among them, the aluminum-silicon alloy with near-eutectic composition is suitable for high-pressure die-casting because of its small crystallization temperature range, good fluidity, and small shrinkage rate. At present, aluminum alloy die castings are developing in the direction of large, thin-walled, complex, high-precision,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/04C22C1/03C22C1/06B22D21/00C22F1/043
Inventor 孙自来
Owner 成都慧腾创智信息科技有限公司
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