A batch manufacturing method and equipment for ultra-fine magnesium wire

Abstract

The invention provides a method and equipment for batch manufacturing of superfine magnesium wires. The method comprises the following steps: changing original large diameters of pure magnesium wires into required small diameters through multi-step continuous drawing; performing annealing treatment of in-situ injection on the magnesium wires by heated inert gas in the drawing process, wherein an anti-oxidation protection effect is achieved in the drawing process; finally after processing, performing coating protection treatment on the surfaces of the magnesium wires, and taking the process as an anti-oxidation measure for long storage. The equipment comprises a continuous diameter-changing and drawing device, an in-situ annealing device and a coating protection treatment device. According to the invention, the safety and the stability of the magnesium wires are guaranteed, the inert gas is adopted for protection in the whole manufacturing process, an anti-oxidation protection coating is used for coating in the end, and the long-term storage problem of the magnesium wires is solved.

Description

technical field [0001] The invention relates to a manufacturing method in the technical field of metal materials, in particular to a batch manufacturing method and equipment for superfine-diameter magnesium wires. Background technique [0002] Metal wire is a very important raw material in the field of medical devices. It can be used to weave various types of implantable stents and other device products. However, the production of magnesium wire is relatively difficult, mainly because magnesium and magnesium alloys and other metals After the material is processed, severe work hardening will occur. If the work hardening cannot be effectively removed, fracture will occur in subsequent processing. Magnesium wire with a small diameter (for example, less than 0.3mm) can be obtained by drawing, but there is also a serious problem of work hardening. It is necessary to effectively remove the processing stress and soften the material so that the processing can be continued and stably...

AI Technical Summary

Problems solved by technology

[0006] China Invention Patent Application No. 200910001699.2 discloses a magnesium-based alloy wire. In order to improve the mechanical properties of the magnesium wire, 0.1-12.0% Al and 0.1-1.0% Mn are added in this patent. Al has high cytotoxicity and cannot meet the requirements of medical magnesium. The biocompatibility requirements of the wire, and its manufacturing process is the same as the traditional processing method, requiring multi-step drawing and intermediate multi-pass annealing treatment, which greatly reduces the processing efficiency of magnesium metal wire and increases the risk of oxidation defect formation

[0007] Chinese patent application number 201220166881.0 discloses an annealing control device for a continuous annealing large drawing machine. This patent mainly anneals the processed material by changing its direct current. There is no protective gas to protect the material during the drawing process. Manufacturing During the process, the material contacts and reacts with oxygen and moisture in the air, resulting in adverse consequences such as oxidation or pitting corrosion

In this regard, there is no public report in the prior art

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