A kind of extrusion casting magnesium alloy material and preparation method thereof

A technology of squeeze casting and magnesium alloy, which is applied in the field of squeeze casting magnesium alloy material and its preparation to achieve the effects of structure refinement, improvement of alloy strength and toughness, and improvement of mechanical properties

Active Publication Date: 2020-11-17
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no domestic and foreign reports on the microstructure modification and modification of AE series magnesium alloys by adding rare earth elements with the above characteristics and the introduction of new strengthening phases to improve the strength and toughness of the alloys.

Method used

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  • A kind of extrusion casting magnesium alloy material and preparation method thereof
  • A kind of extrusion casting magnesium alloy material and preparation method thereof
  • A kind of extrusion casting magnesium alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Alloy composition (mass percentage) of squeeze cast magnesium alloy: 3.82% Al, 2.11% Ce, 1.08% La, 0.98% Pr, 0.01% Sm, 0.32% Mn, other unavoidable impurities are less than 0.2%, and the rest is Mg.

[0046] This embodiment relates to the smelting method of conventional rare earth magnesium alloy and the alloy squeeze casting method among the present invention:

[0047] Among them, the smelting process is in SF 6 and CO 2 Under the condition of mixed gas protection, the steps are as follows:

[0048] (1) Baking material: Preheat the smelting raw material at 200°C for 3 hours;

[0049] (2) Molten magnesium: Put the dried pure magnesium into the SF 6 / CO 2 Melting in a gas shielded crucible resistance furnace;

[0050] (3) Adding pure aluminum and magnesium-manganese master alloy: when the pure magnesium is completely melted and the temperature reaches 670°C, add the preheated pure aluminum and magnesium-manganese master alloy;

[0051] (4) Magnesium rare earth maste...

Embodiment 2

[0057] Alloy composition (mass percentage) of squeeze cast magnesium alloy: 3.74% Al, 2.06% Ce, 1.04% La, 1.01% Pr, 0.44% Sm, 0.12% Nd, 0.03% Er, 0.30% Mn, other unavoidable impurities Less than 0.2%, the rest is Mg.

[0058] This embodiment relates to the smelting method of conventional rare earth magnesium alloy and the alloy squeeze casting method among the present invention:

[0059] Among them, the smelting process is in SF 6 and CO 2 Under the condition of mixed gas protection, the steps are as follows:

[0060] (1) Baking material: Preheat the smelting raw material at 250°C for 2 hours;

[0061] (2) Molten magnesium: Put the dried pure magnesium into the SF 6 / CO 2 Melting in a gas shielded crucible resistance furnace;

[0062] (3) Add pure aluminum and magnesium-manganese master alloy: when the pure magnesium is completely melted and the temperature reaches 680°C, add the preheated pure aluminum and magnesium-manganese master alloy;

[0063] (4) Magnesium rare e...

Embodiment 3

[0069] Alloy composition (mass percentage) of squeeze casting magnesium alloy: 3.94% Al, 4.09% La, 1.09% Sm, 0.19% Nd, 0.04% Er, 0.30% Mn, other unavoidable impurities are less than 0.2%, and the rest is Mg.

[0070] This embodiment relates to the smelting method of conventional rare earth magnesium alloy and the alloy squeeze casting method among the present invention:

[0071] Among them, the smelting process is in SF 6 and CO 2 Under the condition of mixed gas protection, the steps are as follows:

[0072] (1) Baking material: Preheat the smelting raw material at 200°C for 6 hours;

[0073] (2) Molten magnesium: Put the dried pure magnesium into the SF 6 / CO 2 Melting in a gas shielded crucible resistance furnace;

[0074] (3) Add pure aluminum and magnesium-manganese master alloy: when the pure magnesium is completely melted and the temperature reaches 690°C, add the preheated pure aluminum and magnesium-manganese master alloy;

[0075] (4) Magnesium rare earth maste...

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Abstract

The invention belongs to the field of structural metallic materials, and particularly relates to an extrusion casting magnesium alloy material and a preparation method thereof. The material is prepared from the following elements in percentage by mass: a% of Al, b% of one or more of La, Ce and Pr, c% of Mn, d% in total of one or more of RE rare earth elements Gd, Y, Sm, Nd, Er, Eu, Ho, Tm, Lu, Dyand Yb, less than 0.2% of impurities and the balance Mg, wherein a, b, c and d satisfy the following conditions: a is greater than or equal to 3.5 and less than or equal to 4.5, b is greater than or equal to 3.5 and less than or equal to 4.5, c is greater than or equal to 0.2 and less than or equal to 0.5, and d is greater than or equal to 0.01 and less than or equal to 3.0. The material has the advantages of being excellent in mechanical property, good in casting performance and capable of expanding the application field of the magnesium alloy material. The invention further provides a preparation technology. The preparation technology has the advantages of being good in stability and high in controllability.

Description

technical field [0001] The invention belongs to the field of metal structural materials, and in particular relates to a squeeze casting magnesium alloy material and a preparation method thereof. Background technique [0002] As global energy shortages, environmental pollution and other issues become more and more prominent, energy conservation and emission reduction of automobiles has become an inevitable choice for the world to deal with major challenges of resources and the environment. The report of the World Automobile Association pointed out that the fuel consumption of the body weight accounts for ~ 70% of the total fuel consumption of the car. For every 10% reduction in car weight, the fuel consumption can be reduced by 6% to 8%, and the emission can be reduced by 5% to 6%. Therefore, the car body is light. Quantification has become an important development trend of today's car body materials. Magnesium and its alloys are the lightest metal structural materials curre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C23/06C22C1/03C22C1/06C22F1/06B22D17/00
CPCB22D17/00C22C1/03C22C1/06C22C23/02C22C23/06C22F1/06
Inventor 王渠东魏杰雷川
Owner SHANGHAI JIAOTONG UNIV
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