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Extrusion cast aluminum alloy material and preparation method thereof

An aluminum alloy material and squeeze casting technology, which is applied in the field of metal materials, can solve the problems of large fluctuation in the tensile strength of the alloy, and the reliability of the strength needs to be improved, and achieves the reduction of the hot cracking tendency of the alloy, the simple preparation method, and the feasible process. high control effect

Active Publication Date: 2018-10-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with cast Al-Si alloys, the mechanical properties of this alloy are significantly improved, but the tensile strength of the alloy fluctuates greatly, and the reliability of the strength needs to be improved

Method used

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  • Extrusion cast aluminum alloy material and preparation method thereof
  • Extrusion cast aluminum alloy material and preparation method thereof
  • Extrusion cast aluminum alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]The extrusion casting aluminum alloy material provided in this embodiment is composed of the following elements in mass percentage: Mg: 2.5%, Zn: 3.0%, Cu: 0.5%, Y: 0.01%, Ti: 0.01%, B: 0.002%, Sr: 0.1%, Zr: 0.1%, and unavoidable impurities Fe≤0.3%, Si≤0.15%, Al balance.

[0045] The extrusion casting method of aluminum alloy provided in this embodiment, the steps are as follows:

[0046] a. Melting the alloy to obtain an aluminum alloy melt.

[0047] The smelting steps are: (1) Bake the material, preheat the raw material at 250°C for 2 hours; (2) Smelt, set the melting temperature of the melting furnace to 710°C, and when the furnace temperature rises to 300°C, add industrial pure aluminum, aluminum and copper Alloy, until the melt is clear, and stir evenly; when the melt temperature drops to 690°C, add industrial pure zinc and industrial pure magnesium, melt, and stir evenly, until melt clear; heat the melt to 740°C, add aluminum-yttrium Intermediate alloy, stir even...

Embodiment 2

[0053] The extrusion casting aluminum alloy material provided in this embodiment is composed of the following elements in mass percentage: Mg: 2.5%, Zn: 3.0%, Cu: 0.5%, Y: 0.01%, Ti: 0.01%, Sr: 0.1%, Zr: 0.1%, and unavoidable impurities Fe≤0.3%, Si≤0.15%, Al balance.

[0054] The extrusion casting method of aluminum alloy provided in this embodiment, the steps are as follows:

[0055] a. Melting the alloy to obtain an aluminum alloy melt. Melting steps: (1) Bake the material, preheat the raw material at 250°C for 2 hours; (2) Melt, set the melting temperature of the melting furnace to 710°C, when the furnace temperature rises to 300°C, add industrial pure aluminum, aluminum-copper master alloy , until the melt is clear, and stir evenly; when the melt temperature drops to 690°C, add industrial pure zinc and industrial pure magnesium, melt, and stir evenly, until the melt is clear; heat the melt to 740°C, and add aluminum-yttrium intermediate Stir the alloy evenly until it mel...

Embodiment 3

[0060] The extrusion casting aluminum alloy material provided in this embodiment is composed of the following elements in mass percentage: Mg: 2.5%, Zn: 3.0%, Cu: 0.5%, aluminum-cerium-rich mixed rare earth: 1.5%, Ti: 0.01% , B: 0.002%, Sr: 0.1%, Zr: 0.15%, and unavoidable impurities Fe≤0.3%, Si≤0.15%, Al balance.

[0061] This embodiment provides a squeeze casting method for the aluminum alloy, the steps are as follows:

[0062] a. Melting the alloy to obtain an aluminum alloy melt. Melting steps: (1) Bake the material, preheat the raw material at 250°C for 2 hours; (2) Melt, set the melting temperature of the melting furnace to 710°C, when the furnace temperature rises to 300°C, add industrial pure aluminum, aluminum-copper master alloy , until the melt is clear, and stir evenly; when the melt temperature drops to 690°C, add industrial pure zinc and industrial pure magnesium, melt, and stir evenly, until the melt is clear; heat the melt to 740°C, add aluminum-rich cerium M...

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Abstract

The invention belongs to the technical field of metal materials, and in particular, relates to an extrusion cast aluminum alloy material and a preparation method thereof. The extrusion cast aluminum alloy material comprises the following elements in percentage by mass: 2.5-6.0% of Mg, 3.0-6.0% of Zn, 0.5-2.0% of Cu, 0.01-1.5% of rare earth element RE, 0.00005-0.2% of Ti, 0.00001-0.1% of B, 0-0.2%of Sr, 0-0.2% of Zr, the balance of Al, and impurities not more than 0.45%, wherein the rare earth element is one or combination of more in Ce, Y, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu. The aluminum alloy material is excellent in room-temperature comprehensive mechanical performance and casting performance.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a squeeze casting aluminum alloy material and a preparation method thereof. Background technique [0002] As a traditional metal material, cast aluminum alloy is widely used in automobiles, aerospace and other fields due to its low density and high specific strength. The cast aluminum alloy is mainly Al-Si series, such as A356, its main disadvantages are low strength and low plasticity. With the development of modern industry, there is an increasing demand for high-performance cast aluminum alloys. However, the high-strength and tough cast aluminum alloys in the prior art have the problems of poor castability and low mechanical properties. [0003] Chinese patent CN105603274A discloses a high-strength, high-toughness, corrosion-resistant cast aluminum alloy for gravity casting, the alloy composition in terms of mass percentage is Mg: 13-15%, Zn: 3.35-4.97%, C...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/03C22C1/06C22F1/04
CPCC22C1/026C22C1/03C22C1/06C22C21/00C22F1/04
Inventor 王渠东汤华平雷川丁文江
Owner SHANGHAI JIAO TONG UNIV
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