High-strength high-toughness magnesium-base alloy and preparation method thereof

A high-toughness magnesium and base alloy technology, applied in the field of alloy materials, can solve the problems of poor creep resistance, poor alloy strength and tensile properties, low density specific elasticity, etc., to improve heat resistance and mechanical properties. , the effect of improving casting performance

Active Publication Date: 2014-12-24
YANCHENG XINYANG ELECTROTHERMAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although magnesium-based alloys have the characteristics of low density, good heat dissipation, high specific stiffness, large specific elasticity, and easy recycling, they are widely used in the fields of machinery, electronic aerospace and aviation lights, but the tensile pour point and yield strength of magnesium alloys are low. Poor creep resistance is still a factor limiting its application
[0003] Chinese patent CN102719716A relates to a heat-resistant magnesium-based alloy. La and Ce are added to the alloy to improve the heat-resistant performance of the magnesium-based alloy, but the alloy is still difficult to meet th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A high-strength and high-toughness magnesium-based alloy whose composition is shown below is prepared. Contains the following components by weight percentage: Zn 4.5%, Sn 0.7%, Gd 0.28%, Ti 1%, Al 0.5%, Ca 0.7%, Sr 0.9%, La 0.3%, Sm 0.4%, Nd 0.45%, Y 0.4 %, Zr 0.4%, Mn 1%, Cu 0.3%, Ce 0.3%, Nb 1%, boron nitride nanotube particles 4%, graphene 5%, tungsten carbide whiskers 3%, and the remaining components are Mg. The alloy is prepared by the following steps:

[0025] (1) Dosing according to the above weight percentages: prepare pure Mg ingots, pure Zn ingots, and other alloying elements, boron nitride nanotube particles, graphene particles, and tungsten carbide whiskers with corresponding contents;

[0026] (2) Put pure Mg ingots and Zn ingots in a crucible, melt them under the protection of nitrogen, add other alloying elements according to the composition ratio of the product, and then add tungsten carbide whiskers and boron nitride nanotube particles after fully melt...

Embodiment 2

[0031] Prepare another high-strength and high-toughness magnesium-based alloy with a composition ratio. Contains the following components by weight percentage: Zn 5.5%, Sn 0.8%, Gd 0.30%, Ti 1.5%, Al 1%, Ca 0.8%, Sr 1.1%, La 0.4%, Sm 0.45%, Nd 0.55%, Y0. 45%, Zr 0.5%, Mn 1.1%, Cu 0.4%, Ce 0.35%, Nb 1.2%, boron nitride nanotube particles 6%, graphene 6%, tungsten carbide whiskers 4%, and the remaining components are Mg.

[0032] The preparation method of the above-mentioned magnesium-based alloy is as follows:

[0033] (1) Dosing according to the above weight percentages: prepare pure Mg ingots, pure Zn ingots, and other alloying elements, boron nitride nanotube particles, graphene particles, and tungsten carbide whiskers with corresponding contents;

[0034] (2) Put pure Mg ingots and Zn ingots in a crucible, melt them under the protection of nitrogen, add other alloying elements according to the composition ratio of the product, and then add tungsten carbide whiskers and bor...

Embodiment 3

[0039] The ratio of each component of the reinforced magnesium-based alloy described in the present invention is adjusted, and the alloy component with the best overall performance is selected. Specifically, the preferred reinforced magnesium-based alloy with the best effect in the present invention contains the following components by weight percentage: Zn 5%, Sn 0.76%, Gd 0.29%, Ti 1.4%, Al 0.8%, Ca 0.75%, Sr 1.0%, La 0.35%, Sm 0.42%, Nd 0.5%, Y 0.43%, Zr 0.45%, Mn 1.06%, Cu 0.35%, Ce 0.33%, Nb 1.15%, boron nitride nanotube particles 5% graphene 5.5 %, tungsten carbide whiskers 3.5%, and the remaining components are Mg.

[0040] The preparation method of the magnesium-based alloy is as follows:

[0041] (1) Dosing according to the above weight percentages: prepare pure Mg ingots, pure Zn ingots, and other alloying elements, boron nitride nanotube particles, graphene particles, and tungsten carbide whiskers with corresponding contents;

[0042] (2) Put pure Mg ingots and Zn...

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Abstract

The invention relates to a high-strength high-toughness magnesium-base alloy which is characterized by containing the following components in percentage by weight: 4.5-5.5% of Zn, 0.7-0.8% of Sn, 0.28-0.30% of Gd, 1-1.5% of Ti, 0.5-1% of Al, 0.7-0.8% of Ca, 0.9-1.1% of Sr, 0.3-0.4% of La, 0.4-0.45% of Sm, 0.45-0.55% of Nd, 0.4-0.45% of Y, 0.4-0.5% of Zr, 1-1.1% of Mn, 0.3-0.4% of Cu, 0.3-0.35% of Ce, 1-1.2% of Nb, 4-6% of boron nitride nanotube particle, 5-6% of graphene, 3-4% of tungsten carbide crystal whisker and the balance of Mg. The strength, toughness, heat resistance and tensile property of the alloy are greatly enhanced as compared with the prior art.

Description

technical field [0001] The invention relates to the field of alloy materials, in particular to a high-strength and high-toughness magnesium-based alloy and a preparation method thereof. Background technique [0002] Due to the unique properties of magnesium alloy materials, especially its high recovery rate, which not only effectively utilizes resources, but also reduces environmental pollution, major companies in the world have started research on magnesium alloys. Although magnesium-based alloys have the characteristics of low density, good heat dissipation, high specific stiffness, large specific elasticity, and easy recycling, they are widely used in the fields of machinery, electronic aerospace and aviation lights, but the tensile pour point and yield strength of magnesium alloys are low. Poor creep resistance is still a factor limiting its application. [0003] Chinese patent CN102719716A relates to a heat-resistant magnesium-based alloy. La and Ce are added to the al...

Claims

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Application Information

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IPC IPC(8): C22C23/04C22C1/02C22C1/06C22C32/00
Inventor 郭健郭小芳郭乃林
Owner YANCHENG XINYANG ELECTROTHERMAL MATERIAL CO LTD
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