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High-strength high-toughness high-modulus deformed 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 excellent mechanical properties and fine structure

Active Publication Date: 2019-07-05
SHANGHAI JIAO TONG 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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  • High-strength high-toughness high-modulus deformed magnesium alloy and preparation method thereof
  • High-strength high-toughness high-modulus deformed magnesium alloy and preparation method thereof
  • High-strength high-toughness high-modulus deformed magnesium alloy and preparation method thereof

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Experimental program
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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 high-strength high-toughness high-modulus deformed magnesium alloy and a preparation method thereof. The high-strength high-toughness high-modulus deformed magnesium alloy iscomposed of the following elements of, by mass, a% of Al, b% of one of La, Ce and Pr or b% of a mixture of several of the La, the Ce, the Pr, c% of Mn, a total of d% of one or several of RE rare earth elements Gd, Y, Sm, Nd, Er, Eu, Ho, Tm, Lu, Dy and Yb, a total of e% of one or several of Si, Ge, Ca, Li, Sn, Zn and Sb, a total of less than 0.2% of impurities and the balance Mg, wherein the a, the b, the c, the d and the e meet the requirements that the a is greater than or equal to 3.5 and less than or equal to 6.0, the b is greater than or equal to 0.5 and less than or equal to 4.5, the c is greater than or equal to 0.01 and less than or equal to 1.0, the d is greater than or equal to 0.01 and less than or equal to 2.5, and the e is greater than 0 or less than or equal to 4.0. A raw material are preheated, melted and cast to obtain a magnesium alloy cast ingot, the magnesium alloy cast ingot undergoes hot extrusion or hot forging or hot rolling to obtain the magnesium alloy deformedpiece, the method is simple, the process stability is good, and the controllability is high.

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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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 JIAO TONG UNIV
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