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A kind of high strength toughness high modulus deformation magnesium alloy and preparation method thereof

A deformed magnesium alloy, high modulus technology, applied in the field of non-ferrous metal materials and their processing, to achieve the effect of improving strength and toughness and elastic modulus, improving strength and toughness, and simple preparation method

Active Publication Date: 2021-06-04
SHANGHAI JIAOTONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art, to provide a high-strength, toughness, high-modulus deformed magnesium alloy and its preparation method, through reasonable regulation and control of component ratio, control the precipitation form and ratio of reinforcement phase, and through hot extrusion, hot Forging, hot rolling and other processing techniques further refine the crystal grains and second phases, and homogenize the distribution of the second phases, so that the alloy has high strength, toughness and high elastic modulus at room temperature. The alloy provided by the invention can meet the requirements of high strength Demand for tough and high modulus lightweight materials and / or parts manufacturing

Method used

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  • A kind of high strength toughness high modulus deformation magnesium alloy and preparation method thereof
  • A kind of high strength toughness high modulus deformation magnesium alloy and preparation method thereof
  • A kind of high strength toughness high modulus deformation magnesium alloy and preparation method thereof

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Effect test

Embodiment 1

[0056] Alloy composition (mass percentage) of deformed magnesium alloy: 3.84% Al, 0.94% Ce, 1.12% La, 0.42% Sm, 0.25% Si, 0.50% Zn, 0.33% Mn, other unavoidable impurities are less than 0.2%, and the rest are Mg.

[0057] This embodiment relates to the smelting method of conventional rare earth magnesium alloy and the alloy deformation method in the present invention:

[0058] Among them, the smelting process is in SF 6 and CO 2 Under the condition of mixed gas protection, the steps are as follows:

[0059] Preheat the smelting raw materials at 200°C for 3 hours; put the dried pure magnesium into the SF 6 / CO 2 Melt in a gas-protected crucible resistance furnace; when the pure magnesium is completely melted and the temperature reaches 670°C, add preheated pure aluminum, pure zinc, magnesium-manganese master alloy; when the temperature rises to 720°C, add preheated magnesium Cerium master alloy, magnesium lanthanum master alloy, magnesium samarium master alloy, magnesium si...

Embodiment 2

[0064] Alloy composition (mass percentage) of high strength, toughness and high modulus deformed magnesium alloy: 3.79% Al, 1.14% Ce, 1.28% La, 0.42% Sm, 0.25% Si, 0.50% Zn, 0.30% Mn, other inevitable impurities are less than 0.2%, the rest is Mg.

[0065] This embodiment relates to the smelting method of conventional rare earth magnesium alloy and the alloy deformation method in the present invention:

[0066] Among them, the smelting process is in SF 6 and CO 2 Under the condition of mixed gas protection, the steps are as follows:

[0067] Preheat the smelting raw materials at 250°C for 2 hours; put the dried pure magnesium into the SF 6 / CO 2 Melt in a gas-protected crucible resistance furnace; when the pure magnesium is completely melted and the temperature reaches 680°C, add preheated pure aluminum, pure zinc, magnesium-manganese master alloy; when the temperature rises to 730°C, add preheated magnesium Cerium master alloy, magnesium-lanthanum master alloy, magnesium...

Embodiment 3

[0071] Alloy composition (mass percentage) of high strength, toughness and high modulus deformed magnesium alloy: 3.71% Al, 1.57% Ce, 1.71% La, 0.42% Sm, 0.25% Si, 0.50% Zn, 0.24% Mn, other inevitable impurities are less than 0.2%, the rest is Mg.

[0072] This embodiment relates to the smelting method of conventional rare earth magnesium alloy and the alloy deformation method in the present invention:

[0073] Among them, the smelting process is in SF 6 and CO 2 Under the condition of mixed gas protection, the steps are as follows:

[0074]Preheat the smelting raw materials at 250°C for 2 hours; put the dried pure magnesium into the SF 6 / CO 2 Melt in a gas-protected crucible resistance furnace; when the pure magnesium is completely melted and the temperature reaches 680°C, add preheated pure aluminum, pure zinc, magnesium-manganese master alloy; when the temperature rises to 730°C, add preheated magnesium Cerium master alloy, magnesium-lanthanum master alloy, magnesium-...

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Abstract

The invention discloses a deformed magnesium alloy with high strength, toughness and high modulus and a preparation method thereof, which is composed of the following elements in terms of mass percentage: a% of Al, b% of one or more of La, Ce, and Pr Mixed, c% of Mn, a total of d% of RE rare earth elements Gd, Y, Sm, Nd, Er, Eu, Ho, Tm, Lu, Dy, Yb one or more elements, a total of e% One or several elements in Si, Ge, Ca, Li, Sn, Zn, Sb, the total amount of impurities is less than 0.2%, and the balance is Mg; a, b, c, d and e satisfy 3.5≤a≤6.0 , 0.5≤b≤4.5, 0.01≤c≤1.0, 0.01≤d≤2.5 and 0

Description

technical field [0001] The invention belongs to the field of non-ferrous metal materials and their processing, and in particular relates to a deformed magnesium alloy with high strength, toughness and high modulus and a preparation method thereof. Background technique [0002] Magnesium and its alloys are the lightest metal structural materials currently available in industry, with low density (about 2 / 3 of aluminum and 1 / 4 of steel), high specific strength and specific stiffness, damping, and machinability , Casting performance and other advantages, has been widely used in automotive, communication electronics, aerospace, military and other fields. In recent years, with the rapid development of aerospace and transportation tools, the power required for operation is increasing, so higher requirements are placed on the strength, toughness and elastic strain resistance of material components. However, the lower absolute strength, plasticity and elastic modulus of magnesium al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C23/06C22C23/00C22C23/04C22C1/03C22C1/06C22F1/06
CPCC22C1/03C22C1/06C22C23/00C22C23/02C22C23/04C22C23/06C22F1/06
Inventor 王渠东魏杰
Owner SHANGHAI JIAOTONG UNIV
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