Novel magnesium alloy with high medical performance

A technology of magnesium alloy and high performance, which is applied in the field of selective laser melting preparation technology and heat treatment, can solve the problems of corrosion resistance, poor wear resistance, loss of mechanical integrity, etc., and achieve excellent biocompatibility and mechanical compatibility Effect

Active Publication Date: 2019-03-08
陕西智宇寰宸医疗器械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, medical magnesium alloys have poor corrosion resistance and wear resistance as implants, resulting in too fast degradation rates, and the implants lose their mechanical integrity before the tissue heals.

Method used

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  • Novel magnesium alloy with high medical performance
  • Novel magnesium alloy with high medical performance
  • Novel magnesium alloy with high medical performance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. The composition of the above alloy powder: 2% molybdenum; 1% tantalum; 0.5% chromium; 5% titanium; the rest is magnesium and inevitably contains C, S, P and other impurities. Pour the above-mentioned powder into the miniature omnidirectional planetary ball mill F-P400E, the speed of the ball mill tank is 600r / min, so that the metal powder is fully mixed and ground.

[0035] 2. Such as figure 1 As shown, the selective laser melting method

[0036] SLM Solutions 500 is used to process the ball-milled mixed powder obtained in step (1); SLM parameters include a laser power of 110W, a fiber laser spot size of 0.15mm, a groove pitch of 0.10mm, and a powder layer thickness of 0.03mm; using 200mm The scanning speed of / s prepares a cylindrical sample with a size of 10mm×5mm. The heating rate in the SLM system is 10°C / s, and the protective gas nitrogen is input. The concentration of nitrogen is 1800cc. The temperature is raised to the preset temperature of 1200°C and the temperat...

Embodiment 2

[0040] 1. The composition of the above alloy powder: molybdenum 3%; tantalum 2%; chromium 1.5%; titanium 10%; the rest is magnesium and inevitably containing C, S, P and other impurities. Pour the above powder into the miniature omnidirectional planetary ball mill F-P400E, the rotating speed of the ball mill tank is 700r / min, so that the metal powder is fully mixed and ground.

[0041] 2. Such as figure 1 As shown, the selective laser melting method

[0042] SLM Solutions 500 is used to process the ball-milled mixed powder obtained in step (1); SLM parameters include a laser power of 115W, a spot size of 0.18mm, a groove spacing of 0.11mm, and a powder layer thickness of 00.4mm. A cylindrical sample with a size of 10mm×5mm was prepared with a scanning speed of 220mm / s. The heating rate in the SLM system is 15°C / s, and the protective gas nitrogen is input. The nitrogen concentration is 1800cc, and the temperature is increased to the preset temperature of 1300°C. The temperature is ...

Embodiment 3

[0046] 1. The composition of the above alloy powder: molybdenum 4.5%; tantalum 3%; chromium 2.5%; titanium 10%; the rest is magnesium and inevitably containing C, S, P and other impurities. Pour the above powder into the miniature omnidirectional planetary ball mill F-P400E, the rotating speed of the ball mill tank is 750r / min, so that the metal powder is fully mixed and ground.

[0047] 2. Such as figure 1 As shown, the selective laser melting method

[0048] SLM Solutions 500 is used to process the ball-milled mixed powder obtained in step (1); SLM parameters include a laser power of 125W, a spot size of 0.18mm, a groove pitch of 0.11mm, and a powder layer thickness of 0.06mm; 250mm / s The scanning speed is 10mm×5mm cylindrical sample. The heating rate in the SLM system is 35°C / s, and the protective gas nitrogen is input. The concentration of nitrogen is 1800cc. The temperature is raised to the preset temperature of 1450°C and the temperature is kept for 6 hours. The protective g...

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Abstract

The invention discloses a novel magnesium alloy with high medical performance. The novel magnesium alloy is prepared through the following method which comprises the steps that various magnesium alloycomponents are subjected to ball grinding, levigation and mixing; German SLM Solutions 500 is adopted for selective laser melting treatment; magnesium alloy products generated after selective laser melting treatment are sequentially subjected to 580-800DEG C incomplete quenching for 1 h to 3 h and 200-280DEG C tempering for 1.5 h to 2.5 h; and finally finished products are obtained through cutting. Alloy powder components are adopted, molybdenum, tantalum, chromium and titanium all have good corrosion resistance, the corrosion resistance of the magnesium alloy can be enhanced, and the tensilestrength of the magnesium alloy can be improved.

Description

Technical field [0001] The invention relates to a selective laser melting preparation process and a heat treatment method capable of enhancing the medical performance of magnesium alloys. Background technique [0002] Magnesium alloy has high specific strength and specific rigidity, and is the lightest metal structure material. The elastic modulus of Mg and its alloys is about 45 GPa, which is closer to human cortical bone 17-20 Gpa than other medical metal materials and can avoid stress. Shading effect; Mg density (1.74g / cm3) and human bone (1.75g / cm3) are also very close. Mg released by magnesium alloy in human body 2+ It can promote the growth, proliferation and differentiation of osteoblasts and accelerate the healing of injured bone tissues. [0003] The body's cardiovascular stents, bone nails, bone plates and other bone implant materials need to be naturally degraded after the injured body is repaired. Compared with the traditional titanium alloy, the biggest advantage of ...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/04C22F1/06B22F3/105B33Y10/00B33Y70/00
CPCC22C1/0408C22C23/00C22F1/002C22F1/06B33Y10/00B33Y70/00B22F10/00B22F10/36B22F10/64B22F10/28B22F10/32Y02P10/25
Inventor 鄢腊梅袁友伟
Owner 陕西智宇寰宸医疗器械有限公司
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