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A kind of metal mold gravity casting aluminum alloy material and preparation method thereof

An aluminum alloy material and gravity casting technology, applied in the field of metal materials, can solve the problems of large fluctuation of alloy tensile strength, the reliability of strength needs to be improved, etc., and achieve improved casting performance, simple preparation method, and good process stability. Effect

Active Publication Date: 2020-12-29
SHANGHAI JIAOTONG 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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  • A kind of metal mold gravity casting aluminum alloy material and preparation method thereof
  • A kind of metal mold gravity casting aluminum alloy material and preparation method thereof
  • A kind of metal mold gravity casting aluminum alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]The metal type gravity casting aluminum alloy material provided in this embodiment is composed of the following elements in mass percentage: Mg: 2.0%, 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≤0.15%, Si≤0.15%, Al balance.

[0045] The metal mold gravity casting method of the 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 Inter...

Embodiment 2

[0053] The metal type gravity casting aluminum alloy material provided in this embodiment is composed of the following elements in mass percentage: Mg: 2.0%, Zn: 3.0%, Cu: 0.5%, Y: 0.01%, Ti: 0.01%, Sr: 0.1% , Zr: 0.1%, and unavoidable impurities Fe≤0.15%, Si≤0.15%, Al balance.

[0054] The metal mold gravity casting method of the 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 a...

Embodiment 3

[0060] The metal type gravity casting aluminum alloy material provided in this embodiment is composed of the following elements in terms of mass percentage: Mg: 2.0%, Zn: 3.0%, Cu: 0.5%, cerium-rich mixed rare earth: 1.5%, Ti: 0.01%, B: 0.002%, Sr: 0.1%, Zr: 0.15%, and unavoidable impurities Fe≤0.15%, Si≤0.15%, the balance of Al.

[0061] This embodiment provides a metal mold gravity 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, ...

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Abstract

The invention belongs to the technical field of metal materials, and particularly relates to a metal-type gravity casting aluminum alloy material and a preparation method thereof. The metal-type gravity casting aluminum alloy material is prepared from the following elements in percentage by mass: 2.0 to 4.5 percent of Mg, 3.0 to 5.5 percent of Zn, 0.5 to 1.5 percent of Cu, 0.01 to 1.5 percent of rare earth element RE, 0.00005 to 0.2 percent of Ti, 0.00001 to 0.1 percent of B, 0 to 0.2 percent of Sr, 0 to 0.2 percent of Zr, the balance Al, and less than or equal to 0.30 percent of impurities, wherein the rare earth element is one or combination of multiple elements of Ce, Y, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu. The aluminum alloy material is excellent in indoor temperature integrated mechanical properties and favorable in casting performance.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a metal type gravity 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....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C21/10C22C1/03C22C1/06C22F1/047C22F1/053
CPCC22C1/026C22C1/03C22C1/06C22C21/06C22C21/10C22F1/047C22F1/053
Inventor 王渠东汤华平雷川丁文江
Owner SHANGHAI JIAOTONG UNIV
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