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Low-cost non-rare-earth type high-strength magnesium alloy and preparing method thereof

A magnesium alloy, non-rare earth technology, applied in the field of low-cost non-rare earth type high-strength magnesium alloy and its preparation, can solve the problems of high cost, difficulty in realizing mass commercial production, etc., achieve low cost, improve processing or production efficiency, Inexpensive effect

Active Publication Date: 2015-12-09
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 non-rare earth type high-strength magnesium alloy and its preparation method

Method used

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  • Low-cost non-rare-earth type high-strength magnesium alloy and preparing method thereof
  • Low-cost non-rare-earth type high-strength magnesium alloy and preparing method thereof
  • Low-cost non-rare-earth type high-strength magnesium alloy and preparing method thereof

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Embodiment 1

[0042] (1) The design selects the Mg-4.8Bi-0.5Ca-0.2Mn (wt%) alloy composition ratio to form a magnesium alloy, and the preparation method comprises the following steps:

[0043] 1) Ingredients: use pure Mg ingot, pure Bi block, Mg-20Ca master alloy and Mg-5Mn master alloy as raw materials, after surface pretreatment (such as removal of dirt, scale, etc., the same as in the following examples), according to the above magnesium The percentage by weight of alloy (every 1000 grams of target alloy can be prepared by 40 grams of Mg-5Mn master alloy, 25 grams of Mg-20Ca master alloy, 48 grams of pure Bi and 887 grams of pure Mg) is carried out batching;

[0044] 2) Melting: Clean and preheat the crucible, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, set the furnace temperature to 720°C, and heat slowly at a heating rate of 20-40°C / min. After the magnesium is completely melted, add pure bismuth, Mg-20Ca master alloy and Mg-5Mn master alloy preh...

Embodiment 2

[0051] (1) design and select Mg-6.2Bi-0.5Ca-0.3Mn (wt%) alloy composition ratio to form a magnesium alloy, and the preparation method includes the following steps:

[0052] 1) Batching: with pure Mg ingot, pure Bi block, Mg-20Ca master alloy and Mg-5Mn master alloy as raw material, carry out batching according to the weight percentage of above-mentioned magnesium alloy (per 1000 grams of target alloy can be made of 60 grams of Mg-5Mn master alloy, 25 grams of Mg-20Ca master alloy, 62 grams of pure Bi and 853 grams of pure Mg);

[0053] 2) Melting: Clean and preheat the crucible, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, set the furnace temperature to 720°C, and heat slowly at a heating rate of 20-40°C / min. After the magnesium is completely melted, add pure bismuth, Mg-20Ca master alloy and Mg-5Mn master alloy preheated to 200-250 ℃ into the magnesium melt in turn, keep it warm for 15 minutes, mechanically stir it for 2 minutes and the...

Embodiment 3

[0060] (1) design and select Mg-7.6Bi-0.8Ca-0.3Mn (wt%) alloy composition ratio to form a magnesium alloy, and the preparation method comprises the following steps:

[0061] 1) Batching: with pure Mg ingot, pure Bi block, Mg-20Ca master alloy and Mg-5Mn master alloy as raw material, carry out batching according to the weight percentage of above-mentioned magnesium alloy (per 1000 grams of target alloy can be made of 60 grams of Mg-5Mn master alloy, 40 grams of Mg-20Ca master alloy, 76 grams of pure Bi and 824 grams of pure Mg));

[0062] 2) Melting: Clean and preheat the crucible, put the magnesium ingot preheated to 200°C into the crucible of the melting furnace, set the furnace temperature to 720°C, and heat slowly at a heating rate of 20-40°C / min. After the magnesium is completely melted, add pure bismuth, Mg-20Ca master alloy and Mg-5Mn master alloy preheated to 200-250°C into the magnesium melt in turn, keep it warm for 15 minutes, mechanically stir it for 2 minutes, then...

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Abstract

The invention relates to low-cost non-rare-earth type high-strength magnesium alloy and a preparing method thereof. The alloy is Mg-Bi-Ca-Mn magnesium alloy, and is prepared from, by mass, 2-10% of Bi, 0.1-1.5% of Ca, 0.1-1.0% of Mn and the balance magnesium. The novel magnesium alloy is based on a Mg-Bi binary metal series, the element Bi serves as the main alloy element, and the Mg3Bi2 phase with high melting point is contained in the magnesium alloy. Furthermore, the magnesium alloy is evenly dispersed and distributed on a matrix through a simple alloying means, the metamorphism to a second phase by the element Ca and the element Mn and the combination of a plastic deformation processing means so that crystal boundary migration can be effectively pinned in the deformation process to hinder dislocated movement, grains are obviously refined, the strength of the alloy is greatly improved, and thus the ultra-high-strength magnesium alloy is developed in the alloy series.

Description

technical field [0001] The invention relates to the field of metal materials and metal material processing, in particular to a low-cost non-rare earth type high-strength magnesium alloy and a preparation method thereof; the novel magnesium alloy can be used as a potential heat-resistant magnesium alloy and a biomedical magnesium alloy material. Background technique [0002] The density of magnesium is about 1.74g / cm 3 , It is 2 / 3 of aluminum alloy and 1 / 4 of steel. Magnesium and magnesium alloys have three advantages of rich resources, energy saving, and environmental friendliness. 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, etc. It is used in automobiles, Electronics, electrical appliances, transportation, aerospace and other fields h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22F1/06
Inventor 余晖孟帅举王志峰赵维民
Owner HEBEI UNIV OF TECH
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