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Magnesium alloy profile and preparation method and application thereof

A magnesium alloy and profile technology, applied in metal extrusion control equipment, metal processing equipment, metal extrusion, etc., can solve the problems of low tensile strength, low yield strength, poor corrosion resistance of magnesium alloy profiles, etc., to achieve The effect of high tensile strength, high yield strength and high plastic deformation

Pending Publication Date: 2018-05-08
JIANGSU FENGYUAN MEDICAL DEVICES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the magnesium alloy profiles processed by this method cannot fully meet the requirements of implantable medical devices due to their poor corrosion resistance, low tensile strength, yield strength and low plastic deformation capacity.

Method used

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  • Magnesium alloy profile and preparation method and application thereof
  • Magnesium alloy profile and preparation method and application thereof
  • Magnesium alloy profile and preparation method and application thereof

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preparation example Construction

[0039] The invention also provides a preparation method of the magnesium alloy profile.

[0040] A method for preparing a magnesium alloy profile, comprising the steps of:

[0041] Provide magnesium alloy blanks,

[0042] The magnesium alloy billet is placed in a mold, and the magnesium alloy billet is reciprocally extruded to obtain a magnesium alloy profile.

[0043] When reciprocating extrusion, the positive pressure is 200KN-500KN, and the back pressure is 200KN-500KN. In this way, the grains can be refined, and the first phase and the second phase can be uniformly redistributed in the magnesium alloy profile.

[0044] Preferably, the magnesium alloy billet is machined before being placed in the mold.

[0045] Wherein, the reciprocating extrusion is extruding with a reciprocating extrusion die containing a necking area inside, so that the magnesium alloy billet is also subjected to the force of the necking area during the reciprocating extrusion process.

[0046] Where...

Embodiment 1

[0066] Mg-Zn-Y-Nd magnesium alloy ingots were prepared by smelting technology. During the smelting process, 1840 g of high-purity magnesium ingots; 60 g of high-purity zinc ingots; 50 g of Mg-25wt% Y master alloy; 50 g of Mg-25wt% Nd master alloy were added. Wherein high purity refers to purity ≥ 99.95%.

[0067] then machined Cylindrical magnesium alloy blanks.

[0068] Then place the magnesium alloy billet in the mold, add an appropriate amount of molybdenum disulfide, and carry out two passes of extrusion processing to obtain the magnesium alloy profile. Wherein, the average grain size of the first phase is 3 μm, and the average grain size of the second phase is 210 nm. The parameters of the reciprocating extrusion process are: the positive pressure is 400KN; the back pressure is 400KN; the extrusion temperature is 543K; the extrusion ratio is 10:1; the extrusion rate is 2mm / s; the mold preheating temperature is 523K.

Embodiment 2

[0070] Utilize smelting technology to prepare the magnesium alloy ingot as in embodiment 1, then machining makes Cylindrical magnesium alloy blanks. Then place the magnesium alloy billet in the mold, add an appropriate amount of molybdenum disulfide, and carry out 4 passes of extrusion processing to obtain the magnesium alloy profile. Wherein, the average grain size of the first phase is 1 μm, and the average grain size of the second phase is 90 nm. The parameters of the reciprocating extrusion process are: the positive pressure is 300KN; the back pressure is 300KN; the extrusion temperature is 600K; the extrusion ratio is 25:1; the extrusion rate is 4mm / s; the mold preheating temperature is 640K.

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Abstract

The invention relates to a magnesium alloy profile and a preparation method and application thereof. Grains in the magnesium alloy include first phase grains and second phase grains dispersely distributed between the first phase grains. The first phase grains are micro grains. The size of the second phase grains is 50-230 nm. Compared with a profile prepared through a traditional casting method, the magnesium alloy profile has the characteristics that the tissue structure is refined, the first phase grains and the second phase grains are uniform, and the size of the second phase grains is 50-230 nm. The magnesium alloy profile has the advantages of high corrosion resistance, high tensile strength, high yield strength and high plastic deformation and can meet the requirement for medical instruments implanted in human bodies.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy medical materials, in particular to a magnesium alloy profile and its preparation method and application. Background technique [0002] Magnesium alloy materials have received more and more attention in the medical field, especially implantable medical devices. Compared with other metal biomaterials, it has the advantages of complete degradation and good biocompatibility after being placed in the human body. [0003] At present, most implantable medical devices are prepared by using magnesium alloy materials by as-cast extrusion. However, the magnesium alloy profiles processed by this method cannot fully meet the requirements of implantable medical devices due to their poor corrosion resistance, low tensile strength, yield strength and low plastic deformation capacity. Contents of the invention [0004] Based on this, it is necessary to address the above problems and provide a magnesiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/06B21C31/00C22F1/06A61L31/02A61L31/14
CPCA61L31/022A61L31/14B21C23/06B21C31/00C22F1/06
Inventor 奚廷斐张志雄万子义关绍康朱世杰李爽
Owner JIANGSU FENGYUAN MEDICAL DEVICES CO LTD
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