A kind of corrosion-resistant biomedical magnesium alloy and its preparation method and application

A biomedical and magnesium alloy technology, applied in the field of biomedical metal materials, can solve problems such as unsatisfactory, mechanical performance degradation, and inflammation, and achieve the effects of reducing potential difference, improving rolling formability, and improving corrosion resistance.

Active Publication Date: 2020-06-02
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the rapid degradation rate of biomagnesium alloys in the human body environment, the mechanical properties decline and cannot meet the requirements of mechanical properties as medical metal implant materials; at the same time, the gas generated by degradation and the increase of pH may cause inflammation

Method used

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  • A kind of corrosion-resistant biomedical magnesium alloy and its preparation method and application
  • A kind of corrosion-resistant biomedical magnesium alloy and its preparation method and application
  • A kind of corrosion-resistant biomedical magnesium alloy and its preparation method and application

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preparation example Construction

[0048] The invention provides a method for preparing a corrosion-resistant biomedical magnesium alloy, comprising the following steps:

[0049] Step 1, cleaning the surfaces of the raw material high-purity magnesium, pure zinc, pure tin and magnesium-calcium master alloy;

[0050] Step 2. Put the crucible into the resistance furnace for preheating, and then pass the first protective gas into the furnace, put the high-purity magnesium into the crucible, raise the furnace temperature until the high-purity magnesium ingot is completely melted, and perform slag removal; then lower the furnace temperature, Then add pure tin, pure zinc, and magnesium-calcium intermediate alloy into the crucible; after the alloy material is melted and stirred at a constant speed, let it stand still;

[0051] Step 3: pour the melt into the preheated copper mold at a constant speed after slag removal, and demould after solidification to obtain the magnesium alloy ingot;

[0052] Step 4, cutting the ingo...

Embodiment 1

[0067] (1) by the mass percent of element in the alloy: tin 0.8%, zinc 1%, calcium 0.25%, all the other are magnesium, take required high-purity magnesium, pure tin, pure zinc, magnesium-30% calcium intermediate alloy, and The raw materials are polished with grinding wheels to remove surface oxides;

[0068] (2) Melting: Put the crucible in a resistance furnace to preheat, and after the temperature of the furnace rises to 500°C, put CO into the furnace 2 and SF 6 Mixed gas; among them, CO 2 and SF 6 The volume ratio of the flow rate is 100:1; put the high-purity magnesium ingot into the crucible after passing the protective gas for 5-10 minutes, raise the furnace temperature to 700°C, and perform slag breaking after the high-purity magnesium ingot is completely melted. Then the furnace temperature is lowered to 680°C, and then pure tin, pure zinc, and Mg-30Ca intermediate alloy are added to the crucible; after the alloy material is melted, stir at a constant speed and count...

Embodiment 2

[0074] (1) by the mass percent of element in the alloy: tin 3%, zinc 1.25%, calcium 0.05%, all the other are magnesium, take required high-purity magnesium, pure tin, pure zinc, magnesium-30% calcium intermediate alloy, and The raw materials are polished with grinding wheels to remove surface oxides;

[0075] (2) Melting: Put the crucible in a resistance furnace to preheat, and after the temperature of the furnace rises to 500°C, put CO into the furnace 2 and SF 6 Mixed gas; among them, CO 2 and SF 6 The volume ratio of the flow rate is 100:1; put the high-purity magnesium ingot into the crucible after passing the protective gas for 5-10 minutes, raise the furnace temperature to 700°C, and perform slag breaking after the high-purity magnesium ingot is completely melted. Then the furnace temperature is lowered to 680°C, and then pure tin, pure zinc, and Mg-30Ca intermediate alloy are added to the crucible; after the alloy material is melted, stir at a constant speed and coun...

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Abstract

The invention discloses an anti-corrosion biomedical magnesium alloy which comprises 0.8-5.0% of tin, 1.0%-1.25% of zinc, 0.05%-0.5% of calcium and the balance of magnesium. The invention discloses apreparation method for the anti-corrosion biomedical magnesium alloy. The preparation method comprises the following steps: 1) cleaning the surfaces of raw materials including high-purity magnesium, pure zinc, pure tin and magnesium calcium intermediate alloy; 2) putting a crucible into a resistance furnace for preheating, and then introducing a first protective gas into the furnace, putting high-purity magnesium into the crucible, rising temperature till the high-purity magnesium ingot completely melts, and then fishing the slag; cooling the resistance furnace, and then adding pure tin, purezinc and magnesium calcium intermediate alloy into the crucible; melting the alloy and then stirring at a uniform speed, and standing by; 3) pouring the flux into a preheated copper mould at a uniformspeed after fishing the slag, solidifying and then de-molding, thereby acquiring a magnesium alloy cast ingot; 4) cutting the cast ingot into sheets, putting into a tube furnace filled with the second protective gas, and then performing homogenizing treatment; 5) rolling a sample after the homogenizing treatment in the step 4).

Description

technical field [0001] The invention relates to the field of biomedical metal materials, in particular to a corrosion-resistant biomedical magnesium alloy and its preparation method and application. Background technique [0002] At present, the clinically used medical metal materials are mainly stainless steel, titanium alloy, and cobalt-chromium alloy. These materials have excellent mechanical properties and corrosion resistance; however, the elastic modulus of these materials is much different from that of natural bone. Large, it may cause stress shielding effect during use, which is not conducive to bone healing. More importantly, most of these metal materials are permanent implant materials. After the patient's fracture heals, he needs to undergo a second operation to remove it, which increases the pain and financial burden of the patient. [0003] In view of the limitations of existing medical implant materials, the development of new medical metal materials with good ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C23/00C22C1/03C22F1/02C22F1/06
CPCC22C1/03C22C23/00C22C23/04C22F1/002C22F1/02C22F1/06
Inventor 王慧远赵正学刘燕李大伟魏冬松
Owner JILIN UNIV
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