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Preparation method of Mg-Zn-Ca series biomedical magnesium alloy

A biomedical and magnesium alloy technology is applied in the field of Mg-Zn-Ca series biomedical deformed magnesium alloy, Mg-Zn-Ca series biomedical magnesium alloy preparation, low-cost preparation, and can solve the problem of increasing the deformation degree of alloy blanks, It is not applicable to the problems of cost industrial production, hindering the growth of recrystallized grains, etc., to achieve the effect of increasing the degree of deformation, reducing the amount of solidification shrinkage, and increasing the nucleation rate

Active Publication Date: 2020-06-23
GRIMAT ENG INST CO LTD
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  • Application Information

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Problems solved by technology

Thirdly, Ca with high melting point exists in the as-cast structure of Mg-Zn-Ca alloy 2 Mg 6 Zn 3 Ternary eutectic compound, the melting point is above 410°C, most of them are distributed in continuous or semi-continuous network between dendrites, in order to avoid oxidation and overburning, there are still a large number of compounds remaining after conventional homogenization process, after deformation There are coarse compound streamlines in the structure, which is very unfavorable to uniform corrosion. If the homogenization at a higher temperature can be carried out in a protective gas environment, the network compound becomes discrete spherical, which can increase the degree of deformation of the alloy blank. And these spherical compounds can hinder the growth of recrystallized grains
In short, the existing Mg-Zn-Ca biomedical magnesium alloy preparation technology is not suitable for industrial production with high cost requirements.

Method used

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  • Preparation method of Mg-Zn-Ca series biomedical magnesium alloy
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  • Preparation method of Mg-Zn-Ca series biomedical magnesium alloy

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Embodiment Construction

[0055] The present invention provides a low-cost preparation method of a Mg-Zn-Ca series biomedical magnesium alloy. The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0056] The preparation method of the Mg-Zn-Ca series biomedical magnesium alloy of the present invention comprises the following steps:

[0057] (1) Batching, melting and solidification system preparation

[0058] Determine the chemical composition of the alloy according to the required mechanical and degradation properties, use magnesium ingots with a purity greater than or equal to 99.9%, zinc ingots with a purity greater than or equal to 99.9%, Mg-Ca and Mg-Sr master alloys, and clean and dry the raw materials before smelting Grinding to remove the oxide layer.

[0059] The invention adopts submerged flow die-casting equipment for smelting and transfer, and adopts an integrated equipment for precisely controlling solidification and residual hea...

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Abstract

The invention relates to a preparation method of Mg-Zn-Ca series biomedical magnesium alloy, and belongs to the technical field of batch preparation of biomedical degradable magnesium alloy. The method comprises the steps of burdening, smelting and solidification system preparation, alloy smelting and purification, undercurrent transfer injection and forced filtration, precise solidification control and waste heat homogenization, near solidus homogenization treatment and plastic deformation treatment. The low-cost preparation technology has the greatest advantages that the preparation of a Mg-Zn-Ca series biomedical magnesium alloy ingot blank with the high thermal cracking tendency and the cross section area larger than 70000 mm <2> is met, homogeneous clean casting of industrial scale isachieved, and therefore the production efficiency can be greatly improved, the deformation degree is increased, and the performance is improved; and meanwhile, the cracking risk of a large cast ingotis greatly reduced, homogenization of a pasty area and a liquid phase area is achieved, the nucleation rate is increased, dendritic crystals are refined, and meanwhile specific gravity segregation and reverse segregation of Zn are effectively avoided.

Description

technical field [0001] The invention relates to a preparation method of Mg-Zn-Ca series biomedical magnesium alloy, in particular to a low-cost preparation method of Mg-Zn-Ca series biomedical deformed magnesium alloy, which belongs to the batch preparation technology of biomedical degradable magnesium alloy field. Background technique [0002] At present, the biomedical metal materials in clinical application mainly include stainless steel, titanium alloy, and cobalt-based alloy. These materials are all non-degradable materials. After a short-term implantation, they must be removed again, which increases the pain of patients and medical expenses. In addition, a common problem with existing metal implant materials such as stainless steel and titanium alloys is that they have poor mechanical compatibility with biological bone. The tensile strength of stainless steel and titanium alloys is more than five times higher than that of natural bone, and the elastic modulus is even h...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/04C22C1/03C22F1/06B22D21/04
CPCB22D21/007B22D21/04C22C1/03C22C23/00C22C23/04C22F1/06
Inventor 石国梁张奎李兴刚李永军马鸣龙袁家伟
Owner GRIMAT ENG INST CO LTD
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