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Preparation method of biomedical magnesium alloy wire

A biomedical and magnesium alloy technology is applied in the field of preparation of biomedical magnesium alloy wire, which can solve the problems of limited size of magnesium wire, unsuitable for large-scale production, large material processing loss, etc., and achieves improvement of microstructure, strength and plasticity. and corrosion resistance improvement effect

Active Publication Date: 2020-06-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese Patent Application No. 201710159114.4 discloses a preparation method of equal angular extrusion combined with multi-pass drawing to obtain a magnesium-zinc alloy wire with better mechanical and corrosion properties than those obtained by simple drawing. However, the equal angular extrusion process The size of the prepared magnesium wire is limited, and the material processing loss is large, which is not suitable for large-scale production

Method used

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  • Preparation method of biomedical magnesium alloy wire
  • Preparation method of biomedical magnesium alloy wire
  • Preparation method of biomedical magnesium alloy wire

Examples

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Embodiment 1

[0031] In this embodiment, the composition of the Mg-2Zn-0.5Nd alloy is by weight percentage: 2% Zn, 0.5% Nd, and the balance is Mg.

[0032] Preparation method: by weight percentage, pure magnesium, 2% Zn, 0.5% Nd are smelted into liquid metal, cast into slabs, surface defects and impurities are removed, the slabs are subjected to homogenization heat treatment at 300°C for 5 hours, and passed through hot rolling ( The furnace temperature is 480°C, the heating time is 4h), processed into a magnesium alloy plate with a thickness of 70mm, a width of 540mm, and a length of 400mm; 400mm magnesium alloy sheet; then the sheet is processed into a magnesium alloy sheet with a thickness of 2mm, a width of 540mm, and a length of 400mm by hot rolling (out of furnace temperature 440°C, heating time 2h).

[0033] Such as figure 1 As shown, the magnesium alloy plate 1 is processed by a mechanical stirring process, the direction of the mechanical stirring is along the rolling direction of t...

Embodiment 2

[0039] In this embodiment, the composition of the Mg-0.2Zn-2.0Nd alloy is by weight percentage: 0.2% Zn, 2.0% Nd, and the balance is Mg.

[0040] Preparation method: by weight percentage, pure magnesium, 0.2% Zn, 2.0% Nd are smelted into liquid metal, cast into a flat ingot, surface defects and impurities are removed, the flat ingot is subjected to homogenization heat treatment at 320 ° C for 5 hours, and passed through hot rolling ( The furnace temperature is 480°C, the heating time is 4h), processed into a magnesium alloy plate with a thickness of 70mm, a width of 540mm, and a length of 400mm; 400mm magnesium alloy sheet; then the sheet is processed into a magnesium alloy sheet with a thickness of 2mm, a width of 540mm, and a length of 400mm by hot rolling (out of furnace temperature 440°C, heating time 2h).

[0041] Such as figure 1 As shown, the magnesium alloy plate 1 is processed by a mechanical stirring process, the direction of the mechanical stirring is along the rol...

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Abstract

The invention relates to the technical field of metal material magnesium alloy preparation, and particularly provides a preparation method of a biomedical magnesium alloy wire. The preparation methodof the biomedical magnesium alloy wire comprises the steps that a magnesium-zinc-neodymium alloy is subjected to the processes of smelting, casting, rolling and the like to prepare a plate, the plateis subjected to a special mechanical stirring process to prepare a machining area having the same thickness with the plate, the machining area is subjected to machining treatment and then taken as a final product of the wire or subjected to multiple passes of drawing, and the wire with the needed diameter is finally formed. According to the preparation method of the biomedical magnesium alloy wire, the rolling and the mechanical stirring processes are introduced, therefore, the forming property of the wire is improved, alloy grains are significantly refined, the size of a second phase is significantly decreased, most of the second phase are solid soluble in a matrix, the strength, especially the elongation, of the obtained wire is significantly improved, the good corrosion resistance is achieved, and the property requirements of the medical magnesium alloy wire are met.

Description

technical field [0001] The invention relates to the technical field of preparation of magnesium alloys as metal materials, and in particular provides a method for preparing biomedical magnesium alloy wires. Background technique [0002] Magnesium alloy wire, as a degradable material with good biological safety, can gradually degrade and metabolize in the body until it disappears after realizing the implant function, avoiding secondary removal surgery, and has broad application prospects in the biomedical field. As implant materials for sternal connection in cardiac surgery, cartilage connection in orthopedic surgery, gastrointestinal anastomosis in general surgery, tracheal stent support, esophageal stent support and duodenal food filtration. [0003] The strength, plasticity and corrosion rate of magnesium alloy wire are the key to its medical application. Magnesium fine wire is formed by drawing, and its microstructure, mechanical properties and corrosion resistance are n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04C22C1/02C22C23/04C22C23/00C22F1/06
CPCB21C37/045B21C37/047C22C1/02C22C23/00C22C23/04C22F1/06
Inventor 马政谭丽丽杨柯
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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