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A low-cost high-strength toughness micro-rare earth deformed magnesium alloy and its preparation method

A deformed magnesium alloy, low-cost technology, applied in the field of metal materials and metal material processing, can solve the problems of high cost and difficulty in realizing mass commercial production, and achieve the effect of improving strength, low price and reducing production cost

Active Publication Date: 2019-10-29
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the existing high-strength magnesium alloys that use a large number of rare earth elements or high-priced alloy elements to cause excessive cost, or use special deformation processing technology to improve strength, so that it is difficult to realize large-scale commercial production. Provide a low-cost high-strength toughness deformed magnesium alloy and its preparation method

Method used

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  • A low-cost high-strength toughness micro-rare earth deformed magnesium alloy and its preparation method
  • A low-cost high-strength toughness micro-rare earth deformed magnesium alloy and its preparation method
  • A low-cost high-strength toughness micro-rare earth deformed magnesium alloy and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Design and select the Mg-2.5Bi-2.5Sn-0.5Ca-0.05Nd (wt%) alloy composition ratio to form a magnesium alloy. The preparation method includes the following steps: (Bi element and Sn element content (mass) ratio is 1: 1, and the ratio of the sum of the two contents to the content (mass) of Ca element is 10:1)

[0045] 1) Ingredients: use pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Sn (99wt%) block, Mg-20Ca and Mg-30Nd master alloy as raw materials, after surface pretreatment (such as decontamination thing, scale etc., the following examples are the same), carry out batching according to the weight percent of above-mentioned magnesium alloy as target composition;

[0046] 2) The furnace temperature is set to 740°C, and the heating rate is 20°C / min. When the temperature rises to 740°C, put the Mg ingot preheated to 200°C into the crucible of the melting furnace and keep it. The Mg-Ca master alloy and Mg-Nd master alloy at 200°C are added to the magnesium melt; ...

Embodiment 2

[0055] (1) design and select Mg-3.0Bi-3.0Sn-0.6Ca-0.06Nd (wt%) alloy composition ratio to form a magnesium alloy, and the preparation method comprises the following steps:

[0056] 1) Ingredients: use pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Sn (99wt%) block, Mg-20Ca and Mg-30Nd master alloy as raw materials, after surface pretreatment, according to the above magnesium The weight percentage of the alloy is the target composition for batching; (the content (mass) ratio of the Bi element and the Sn element is 1:1, and the sum of the two contents and the content (mass) ratio of the Ca element is 10:1)

[0057] 2) The furnace temperature is set to 740°C, and the heating rate is 20°C / min. When the temperature rises to 740°C, put the Mg ingot preheated to 200°C into the crucible of the melting furnace and keep it. The Mg-Ca master alloy and Mg-Nd master alloy at 200°C are added to the magnesium melt; heat preservation for 15 minutes to fully melt, then stir for 5 minute...

Embodiment 3

[0066] (1) design and select Mg-3.6Bi-3.6Sn-0.7Ca-0.05Nd (wt%) alloy composition ratio to form a magnesium alloy, and the preparation method includes the following steps:

[0067] 1) Ingredients: use pure Mg (99.8wt%) ingot, pure Bi (99wt%) block, pure Sn (99wt%) block, Mg-20Ca and Mg-30Nd master alloy as raw materials, after surface pretreatment (such as decontamination matter, oxide skin, etc., the following examples are the same), and the weight percentage of the above-mentioned magnesium alloy is the target composition; Content (mass) ratio 10.28:1

[0068] 2) The furnace temperature is set at 750°C, and the heating rate is 20°C / min. When the temperature rises to 740°C, put the Mg ingot preheated to 200°C into the crucible of the melting furnace and keep it. The Mg-Ca master alloy and Mg-Nd master alloy at 200°C are added to the magnesium melt; heat preservation for 15 minutes to fully melt, then stir for 5 minutes, and then heat preservation for 8 minutes; the melting, ...

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Abstract

The invention discloses a low-cost high-strength and high-ductility micro rare earth deforming magnesium alloy and a preparation method thereof. The alloy is Mg-Bi-Sn-Zn-Ca-Nd magnesium alloy. The alloy is composed of, by mass, 2.0-4.5% of Bi, 2.0-4.5% of Sn, 0.3-0.8% of Ca, and 0.04-0.1% of Nd. The mass ratio of the element Bi to the element Sn is 0.8-1.5:1, the mass ratio of the sum of masses ofthe element Bi and the element Sn to the element Ca is 8-15:1, and the balance is magnesium and unavoidable impurities. In the atmosphere, the alloy can be directly poured, low-temperature rolling can be realized at the temperature of 100-150 DEG C, the yield strength of the alloy is 363 MPa or above, the tensile strength is 460 MPa or above, the elongation percentage reaches 12% or above, and agood flame retardant effect is realized.

Description

technical field [0001] The invention relates to the field of metal materials and metal material processing, in particular to a low-cost, high-strength and tough micro-rare-earth deformed magnesium alloy and a preparation method thereof; the novel magnesium alloy can be used as a potential heat-resistant magnesium alloy material. Background technique [0002] Magnesium and magnesium alloys have three advantages: abundant resources, light weight, energy saving, and environmental friendliness. The density of magnesium is about 1.74g / cm 3 Compared with other metal structural materials, magnesium alloy is the lightest commercial metal structural material. It has the advantages of high specific strength and rigidity, strong shock absorption, electromagnetic shielding and radiation resistance, easy cutting, and recyclable. It is used in automobiles. , electronics, electrical appliances, transportation, aerospace and other fields have broad application prospects, known as the green...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22F1/06
Inventor 赵维民孟帅举董立山闻晶晶李其智刘浩余晖
Owner HEBEI UNIV OF TECH
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