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High-strength Mg-Ca-Mn-Al-Zn series wrought magnesium alloy containing gadolinium and yttrium rare earth elements and preparation method thereof

A technology of deforming magnesium alloys and light rare earth elements, which is applied in the field of magnesium alloy materials, can solve problems affecting the advantages of magnesium alloys in light weight, and achieve the effects of improving comprehensive mechanical properties, refining grain size, and ensuring strength and toughness

Inactive Publication Date: 2020-07-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding too much heavy rare earth elements will also affect the advantages of magnesium alloys in light weight

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] High-strength Mg-Ca-Mn-Al-Zn series wrought magnesium alloy Mg-0.5Ca-0.2Mn-0.5Al-0.1Zn-0.2Gd / Y containing gadolinium-yttrium rare earth elements, the composition is: 0.5 wt. %Ca; 0.2 wt.%Mn; 0.5 wt.%Al; 0.5 wt.%Zn; 0.2 wt.%Gd+Y, the balance being Mg.

[0021] The preparation method of the high-strength Mg-Ca-Mn-Al-Zn series deformed magnesium alloy containing gadolinium yttrium rare earth element of the present embodiment is:

[0022] (1) Weigh the following components according to mass percentage: 0.5 wt.%Ca; 0.2 wt.%Mn; 0.5 wt.%Al; 0.5 wt.%Zn; 0.2 wt.%Gd+Y, the balance is Mg; Magnesium-manganese master alloy with a manganese content of 6 wt.%, the metal purity is above 99%;

[0023] (2) Ingot smelting: Under the protection of protective gas, add the raw materials in two batches: the first batch: add pure magnesium and heat to 740~780°C, stir well and wait until it is completely melted; the second batch: add Pure calcium, pure aluminum, pure zinc, pure gadolinium, pu...

Embodiment 2

[0028] High-strength Mg-Ca-Mn-Al-Zn series wrought magnesium alloy Mg-0.8Ca-0.1Mn-0.1Al-0.5Zn-2.3Gd / Y containing gadolinium-yttrium rare earth elements, the composition is: 0.8 wt. %Ca; 0.1 wt.%Mn; 0.1 wt.%Al; 0.5 wt.%Zn; 2.3 wt.%Gd+Y, the balance being Mg.

[0029] The preparation method of the high-strength Mg-Ca-Mn-Al-Zn series deformed magnesium alloy containing gadolinium yttrium rare earth element of the present embodiment is:

[0030] (1) Weigh the following components according to mass percentage: 0.8 wt.%Ca; 0.1 wt.%Mn; 0.1 wt.%Al; 0.5 wt.%Zn; 2.3 wt.%Gd+Y, the balance is Mg; Magnesium-manganese master alloy with a manganese content of 6 wt.%, the metal purity is above 99%;

[0031](2) Ingot smelting: Under the protection of protective gas, add the raw materials in two batches: the first batch: add pure magnesium and heat to 740~780°C, stir well and wait until it is completely melted; the second batch: add Pure calcium, pure aluminum, pure zinc, pure gadolinium, pur...

Embodiment 3

[0036] High-strength Mg-Ca-Mn-Al-Zn series wrought magnesium alloy Mg-2.0Ca-1.1Mn-2.0Al-0.5Zn-0.5Gd / Y containing gadolinium-yttrium rare earth elements, the composition is 2.0 wt. %Ca; 1.1 wt.%Mn; 2.0 wt.%Al; 0.5 wt.%Zn; 0.5 wt.%Gd+Y, the balance being Mg.

[0037] The preparation method of the high-strength Mg-Ca-Mn-Al-Zn series deformed magnesium alloy containing gadolinium yttrium rare earth element of the present embodiment is:

[0038] (1) Weigh the following components according to mass percentage: 2.0 wt.%Ca; 1.1 wt.%Mn; 2.0 wt.%Al; 0.5 wt.%Zn; 0.5 wt.%Gd+Y, the balance is Mg; Magnesium-manganese master alloy with a manganese content of 6 wt.%, the metal purity is above 99%;

[0039] (2) Ingot smelting: Under the protection of protective gas, add the raw materials in two batches: the first batch: add pure magnesium and heat to 740~780°C, stir well and wait until it is completely melted; the second batch: add Pure calcium, pure aluminum, pure zinc, pure gadolinium, pur...

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Abstract

The invention discloses a high-strength Mg-Ca-Mn-Al-Zn series wrought magnesium alloy containing gadolinium and yttrium rare earth elements and a preparation method thereof, and belongs to the field of wrought magnesium alloy materials. The high-strength Mg-Ca-Mn-Al-Zn series wrought magnesium alloy comprises the following components in percentage by mass: 0.50-2.00% of calcium, 0.10-2.00% of aluminum, 0.10-2.00% of zinc, 0.10-3.00% of manganese, 0.10-3.00% of rare earth (gadolinium or yttrium), and the balance magnesium and inevitable impurities (Si, Ni, Cu and the like). The preparation method of the magnesium alloy comprises the following steps of: firstly, melting a pure magnesium ingot; after fully melting, adding metal calcium, manganese, aluminum, zinc, rare earth (gadolinium or yttrium) and the like; after fully stirring, casting into an ingot; then, homogenizing the ingot; extruding through a reverse extrusion process to obtain a corresponding extruded profile; and preparing the novel wrought magnesium alloy with high strength and high plasticity through smelting, homogenizing and subsequent extrusion (reverse extrusion) processes. The strength and the toughness of the wrought magnesium alloy are enhanced, and the wrought magnesium alloy has better mechanical properties.

Description

technical field [0001] The invention belongs to the field of magnesium alloy materials, in particular to a high-strength Mg-Ca-Mn-Al-Zn series deformed magnesium alloy containing gadolinium yttrium rare earth elements and a preparation method thereof. Background technique [0002] With the continuous acceleration of global industrial development, environmental issues and resource shortages have attracted more and more attention, and energy conservation and consumption reduction have become urgent problems to be solved. Lightweight materials can greatly save costs and greatly reduce energy consumption, which is of great significance to improving energy efficiency and protecting the environment. As we all know, magnesium and magnesium alloys are the lightest structural materials in industrial and engineering applications so far, and the density of magnesium is only 1.74g / cm 3 , which is only 2 / 3 of aluminum and 1 / 4 of steel, has high specific strength and specific stiffness, ...

Claims

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Application Information

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IPC IPC(8): C22C23/02C22C23/00C22C23/06C22C1/03C22F1/06C22F1/02
CPCC22C1/03C22C23/00C22C23/02C22C23/06C22F1/002C22F1/02C22F1/06
Inventor 潘虎成谢东升任玉平谢红波秦高梧
Owner NORTHEASTERN UNIV
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