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Rolling method of biodegradable medical Zn-Li alloy

A biomedical, zn-li technology, applied in the direction of metal rolling, temperature control, etc., can solve the problems of poor mechanical properties of degradable polymer materials, aggravate the mental and economic burden of patients, and limited application range, etc. Large-scale industrial production, low cost, and good biocompatibility

Active Publication Date: 2018-08-07
北京尚宁科智医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned metal materials are not degradable in the human body, and need to be taken out twice after the operation, which increases the mental and economic burden of the patient.
However, the mechanical properties of degradable polymer materials are not good, and the scope of application is limited.

Method used

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  • Rolling method of biodegradable medical Zn-Li alloy
  • Rolling method of biodegradable medical Zn-Li alloy
  • Rolling method of biodegradable medical Zn-Li alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Homogenization treatment: place the Zn-0.1(wt%) Li alloy ingot in a box-type heating and sintering furnace KSL-1400X, heat up to 200°C at a rate of 2°C / min, and keep it for 1 hour; then heat it at 0.5°C / min Raise the temperature to 300°C at a certain speed and keep it warm for 1 hour; cool down with the furnace.

[0024] Preheating: heat the ingot at 300°C for 1 hour.

[0025] Hot rolling: start rolling temperature is 300℃, roll speed is 0.3m / s; the first pass, the alloy sample with a thickness of 21mm is rolled to a thickness of 18mm; the second pass, the alloy sample is rolled to 13mm; minutes; the third pass, the alloy sample was rolled to 10mm; the fourth pass, the alloy sample was rolled to 6mm; quenched in water;

[0026] Warm rolling: place the hot-rolled and quenched sample in a heating furnace at 70°C and keep it warm for 20 minutes; the rolling start temperature is 70°C, the roll speed is 0.3m / s, and the alloy sample is rolled to a thickness of 3mm in one pas...

Embodiment 2

[0028] Homogenization treatment: place the Zn-0.5 (wt%) Li alloy ingot in a box-type heating and sintering furnace KSL-1400X, heat up to 260°C at a rate of 4°C / min, and keep it for 2 hours; then heat it at 0.7°C / min The temperature is raised to 330°C at a certain speed, and the temperature is kept for 2 hours; it is cooled with the furnace.

[0029] Preheating: heat the ingot at 330°C for 1.5 hours.

[0030] Hot rolling: start rolling temperature is 330℃, roll speed is 0.5m / s; the first pass, the alloy sample with a thickness of 18mm is rolled to a thickness of 14mm; the second pass, the alloy sample is rolled to 10mm; minutes; in the third pass, the alloy sample was rolled to 7 mm; in the fourth pass, the alloy sample was rolled to 4 mm; quenched in water.

[0031] Warm rolling: place the hot-rolled and quenched sample in a heating furnace at 200°C for 30 minutes; start rolling at a temperature of 200°C and a roll speed of 0.5m / s, and roll the alloy sample in one pass to a t...

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Abstract

The invention discloses a rolling method of a biodegradable medical Zn-Li alloy and belongs to the technical field of biodegradable medical materials and metal rolling. The method includes: homogenizing alloy ingots: rising temperature to 200-280 DEG C at a speed of 2-6 DEG C per min, holding the temperature for 1-2h, rising the temperature to 300-380 DEG C at a speed of 0.5-1 DEG C per min, holding the temperature for 1-2h, and cooling along with a furnace; after alloy is preheated, hot rolling: putting the alloy back into the furnace and holding the temperature for 10-20min after the secondtime of rolling, and quenching in water after the fourth time of rolling, wherein rolling start temperature is 300-380 Deg C, press-down amount of each time of rolling is 25-40%, and rolling is performed for four times in total; warm rolling: rolling once, and quenching in water, wherein rolling start temperature is 60-250 DEG C, and press-down amount is 50-70%. Through a simple rolling process, the biodegradable Zn-Li alloy with high strength and high plasticity is obtained, the problem of low section plasticity caused by common plastic processing methods is avoided, and material using requirements of various human implantation devices are met. The method is low in cost and easy for large-scale production in factories, thereby having extremely high popularization value and extensive application prospect in the field of medical materials.

Description

technical field [0001] The invention relates to the technical field of biodegradable medical materials and metal rolling, in particular to a heat treatment and rolling method for enhancing the mechanical properties of biomedical degradable Zn-Li alloys. Background technique [0002] At this stage, the human medical implant materials for clinical application are mainly metal materials such as 316L stainless steel, Ti6Al4V, and degradable polymer materials. However, the above-mentioned metal materials are not degradable in the human body, and need to be taken out again after the operation, which increases the mental and economic burden of the patient. However, the mechanical properties of degradable polymer materials are not good, and the scope of application is limited. Therefore, research on degradable metal materials has gradually become a research hotspot in medical materials in recent years. Among them, Fe and its alloys degrade too slowly in the human environment, while...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B3/00B21B37/74
Inventor 王鲁宁郝园石章智
Owner 北京尚宁科智医疗器械有限公司
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