A kind of biodegradable Zn-Na series zinc alloy and preparation method thereof

A biodegradable, zinc alloy technology, used in surgery, medical science and other directions, can solve the problem that zinc alloy is not suitable for medical implant materials, and achieve the effect of high mechanical properties

Active Publication Date: 2020-04-28
北京尚宁科智医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the zinc alloy is not suitable as a medical implant material

Method used

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  • A kind of biodegradable Zn-Na series zinc alloy and preparation method thereof
  • A kind of biodegradable Zn-Na series zinc alloy and preparation method thereof
  • A kind of biodegradable Zn-Na series zinc alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Composition, Preparation and Properties Testing of Biodegradable Zn-Na Binary Zinc Alloy.

[0063] The chemical composition of the four inventive examples of the zinc alloy is shown in Table 1-1, the added Na is 0.01-0.72%, and the balance is Zn. NaZn in the zinc alloy 13 The volume fraction of the second phase is 0.4-30%.

[0064] The preparation and processing flow of the zinc alloy is: continuous casting→hot extrusion→rolling. The raw materials for the continuous casting are metal Zn and Na according to the ratio of Table 1-1, they are put into the graphite crucible of the continuous casting equipment, after vacuuming, the high-purity argon gas is introduced into the protection, and then the graphite crucible is heated by induction. Raise the temperature to 620°C and keep the temperature for 10 minutes until the raw materials are melted and fully mixed under electromagnetic stirring. Heat the temperature of the graphite casting mold to 450°C, start the casting dev...

Embodiment 2

[0075] Composition, preparation and performance testing of biodegradable Zn-Na ternary zinc alloy.

[0076] The chemical composition of the 8 inventive examples of the zinc alloy is shown in Table 2-1. The total amount of alloying elements added is 0.25-0.98%, and the balance is Zn, which belongs to low-alloyed zinc alloy with low cost.

[0077] The preparation and processing flow of the zinc alloy is: continuous casting→hot extrusion→rolling. Use high-purity raw materials for batching according to the content of elements in Table 2-1, put them into the graphite crucible of the continuous casting equipment, put high-purity argon into the protection after vacuuming, and then raise the temperature of the graphite crucible to 650°C by induction heating , keep warm for 8 minutes until the raw materials are melted and fully mixed under electromagnetic force stirring. Heat the temperature of the graphite casting mold to 430°C, start the casting device to slowly pull the continuous ...

Embodiment 3

[0087] Composition, preparation and property test of biodegradable Zn-Na series quaternary zinc alloy.

[0088] The zinc alloy contains 4 alloying elements, 2 of which are essential alloying elements: Zn and Na, and the 3rd to 4th are further added alloying elements. The chemical composition of the 18 examples of the zinc alloy is shown in Table 3-1. The total amount of alloy elements added is 0.46-1.40%, and the balance is Zn, which belongs to low-alloyed zinc alloy and has low cost.

[0089] The preparation and processing flow of the zinc alloy is: continuous casting→homogenizing heat treatment→hot extrusion→rolling. Use high-purity raw materials for batching according to the content of elements in Table 3-1, put them into the graphite crucible of the continuous casting equipment, put high-purity argon into the protection after vacuuming, and then raise the temperature of the graphite crucible to 700°C by induction heating , keep warm for 5 minutes until the raw materials a...

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Abstract

The invention discloses a biodegradable Zn-Na-series zinc alloy, and belongs to the field of medical implant materials. The biodegradable Zn-Na-series zinc alloy comprises 0.01-0.97% of Na, one or more of 27 elements which are harmless or beneficial to a human body, and the balance Zn, wherein in order to lower the cost and obtain excellent comprehensive performance, the total amount of the addedvarious alloy elements is optimally controlled to be no more than 2.0%. A preparation processing process of the zinc alloy comprises the steps of continuous casting, hot extrusion and rolling; or continuous casting, hot extrusion, solidification heat treatment and drawing; or continuous casting, uniform heat treatment, hot extrusion and rolling. According to the biodegradable Zn-Na-series zinc alloy, the yield strength is 100-500 MPa, the tensile strength is 150-700 MPa, and the elongation is 1.5-100%; the degradation rate in simulated body fluid is no more than 0.8 mm / year; and the cytotoxicity to L929 cells and human mesenchymal stem cells is at the zero stage or the one stage, good biocompatibility is shown, and the biodegradable Zn-Na-series zinc alloy can be used for various medical implants.

Description

technical field [0001] The invention relates to the component design, preparation method and application field of a biodegradable Zn-Na series zinc alloy, belonging to the field of medical implant materials. Background technique [0002] Zinc ranks among the top five metals in the world in terms of production and consumption. It is mainly used in zinc-containing products such as coatings, casting alloys, batteries, and brass. Its most important use is the corrosion protection of steel. Zinc is an essential trace element for the human body and is available as a biodegradable metal. However, the tensile strength of zinc is only 120MPa, which cannot meet the mechanical properties requirements of various medical implants, which greatly limits the scope of use of zinc as a biodegradable metal. Zinc and zinc alloys are extremely brittle in the as-cast state, and the elongation at room temperature is usually lower than 3%, which severely limits their applications. [0003] Sodium...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/115C22C1/02C22C18/00C22C18/02C22F1/02C22F1/16A61L31/02A61L31/14A61L31/16
CPCA61L31/022A61L31/148A61L31/16A61L2300/102A61L2300/404B22D11/001B22D11/115C22C1/02C22C18/00C22C18/02C22F1/002C22F1/02C22F1/165
Inventor 石章智刘雪峰王鲁宁于静
Owner 北京尚宁科智医疗器械有限公司
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