Mg-Si-Ca-Zn series magnesium alloy and preparation method and application thereof

A mg-si-ca-zn, magnesium alloy technology, applied in metal rolling, metal processing equipment, manufacturing tools, etc., can solve the problems of low mechanical properties, toxicity, etc.

Active Publication Date: 2019-08-09
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although high-purity magnesium has good biocompatibility and osteogenic properties, its mechanical properties are low, which limits its application.
However, the existing magnesium alloys commonly used i

Method used

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  • Mg-Si-Ca-Zn series magnesium alloy and preparation method and application thereof
  • Mg-Si-Ca-Zn series magnesium alloy and preparation method and application thereof
  • Mg-Si-Ca-Zn series magnesium alloy and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1, preparation cast state Mg-Si-Ca-Zn series magnesium alloy

[0063] Using pure Mg (99.99wt.%), pure Si (99.95wt.%), pure Ca (99.95%) and pure Zn (99.99wt.%) as raw materials, according to different mass ratios (Mg, Si, Ca, Zn The mass ratios are 96.8:0.2:1.0:2.0, 97.3:0.2:0.5:2.0, 95.8:0.2:1.0:3.0, 96.3:0.2:0.5:3.0, 96.6:0.4:1.0:2.0, 97.1:0.4:0.5: 2.0, 95.6:0.4:1.0:3.0, 96.1:0.4:0.5:3.0) mix, in CO 2 +SF 6 Under the protection of the atmosphere, smelt at 750°C. After the raw materials are fully melted and kept warm for 20 minutes, they are poured into graphite molds preheated to 250°C to obtain Mg-Si-Ca-Zn series magnesium alloy ingots. Among them, Mg-0.2Si- 1.0Ca-2.0Zn means that the mass ratios of Mg, Si, Ca, and Zn are 96.8:0.2:1.0:2.0, respectively. Cooling to room temperature was then carried out by furnace cooling.

Embodiment 2

[0064] Embodiment 2, preparation extruded state Mg-Si-Ca-Zn series magnesium alloy

[0065] First, the as-cast Mg-Si-Ca-Zn series magnesium alloy was prepared according to the steps in Example 1, and the Mg-Si-Ca-Zn series magnesium alloy rod was prepared by extrusion, and the radial extrusion was adopted to cast Mg-Si-Ca-Zn series magnesium alloy rods with a diameter of 10mm were prepared by holding the ingot for 4h before extrusion, holding temperature 280°C, extrusion temperature 300°C, extrusion ratio 36, extrusion speed 1mm / s.

Embodiment 3

[0066] Embodiment 3, Mg-Si-Ca-Zn series magnesium alloy microstructure analysis:

[0067] The Mg-Si-Ca-Zn series magnesium alloy in Example 1 was prepared by wire-cutting a φ10×2mm sample, which was sequentially ground and polished by 400#, 800#, 1200# and 2000# SiC sandpaper series. After ultrasonic cleaning in acetone, absolute ethanol and deionized water for 15 min, dry at 25 °C. The sample was subjected to X-ray diffraction analysis, etched with 4% nitric acid alcohol for 5-30 seconds, washed with deionized water, dried, and observed under a metallographic microscope.

[0068] figure 1 It is the metallographic phase of Mg-Si-Ca-Zn magnesium alloy. It can be seen from the figure that after extrusion treatment, the grain size is significantly reduced, and the second phase is evenly distributed. Among them, Mg-0.4Si-0.5Ca-2.0 The grains of Zn alloy and Mg-0.4Si-0.5Ca-3.0Zn alloy are larger than those of other alloys, and the content of the second phase is less. When the co...

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Abstract

The invention discloses an Mg-Si-Ca-Zn series magnesium alloy and preparation method and application thereof. The magnesium alloy comprises Mg-Si-Ca-Zn, the mass percentage of Si in the magnesium alloy is 0-1.0% without being 0, the mass percentage of Ca is 0-1.0% without being 0, and the mass percentage of Zn is 2.0-3.0%, without being 0. The magnesium alloy further comprises trace elements, thetrace elements comprise at least one of strontium, manganese, phosphorus, zirconium, tin, iron, copper and rare earth elements, and the mass percentage of the trace elements is 0-3% without being 0. The mechanical strength of the Mg-Si-Ca-Zn series magnesium alloy conforms to the strength requirements of a medical implanted material, by adjusting and controlling the content of the added alloy elements, the adjustment and control of the degradation speed of the alloy elements in a humane body can be achieved, the experimental results show that the alloy elements has no obvious toxicity to osteoblast, the biocompatibility is high, the patient pain is reduced, and the postoperative safety and comfort are improved.

Description

technical field [0001] The invention relates to a Mg-Si-Ca-Zn series magnesium alloy and a preparation method and application thereof, belonging to the field of medical metal materials. Background technique [0002] Traditional medical metal materials such as stainless steel, cobalt-chromium-molybdenum alloy, titanium alloy, etc. have good mechanical properties and corrosion resistance, and have important social value and economic benefits. However, the long-term existence of these implants in the body may cause varying degrees of irritation to the surrounding tissues, which may cause a series of consequences. For example, the elastic modulus of traditional metal internal fixation materials is much higher than that of human bone, and its long-term existence will cause a "stress shielding" effect, resulting in delayed fracture healing and even induced secondary fractures. For cardiovascular stents, their long-term existence may induce intimal hyperplasia and lead to in-stent...

Claims

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Application Information

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IPC IPC(8): C22C23/04B22D11/06C21D9/08C22C1/02C22F1/06A61L17/06A61L27/04A61L27/50A61L27/58A61L31/02A61L31/14B21C23/00B21B3/00B21J5/00
CPCA61L17/06A61L27/047A61L27/50A61L27/58A61L31/022A61L31/14A61L31/148A61L2430/02A61L2430/12B21B3/00B21C23/002B21J5/00B22D11/0611C21D9/08C22C1/02C22C23/04C22F1/06
Inventor 郑玉峰李文婷成艳夏丹丹刘晓
Owner PEKING UNIV
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