A corrosion-resistant high-strength toughness magnesium alloy pipe and its preparation process

Abstract

The embodiment of the invention provides a corrosion-resistant high strength and toughness magnesium alloy tubular product and a preparation process. The alloy tubular product is prepared from the following elements in percent by mass: 1.0-6.0% of Nd, 0.1-5.0% of Zn, 0.1-5.0% of Ca, 0.1-4.0% of Zr and the balance Mg. The preparation process comprises the following steps: successively preparing a magnesium alloy cast ingot, a magnesium alloy blank, a magnesium round bar and a magnesium hollow round ingot through a series of steps: vacuum semicontinuous casting, solid solution homogenizing, barextrusion processing, hollow round ingot processing and the like; and finally, extruding the hollow round ingot to obtain the corrosion-resistant high strength and toughness magnesium alloy tubular product. The corrosion-resistant high strength and toughness magnesium alloy tubular product solves the problem of hard plastic processing for preparing a bracket as the magnesium alloy tubular productis relatively poor in deformability at room temperature in the prior art, can be degraded uniformly in vivo while achieving an ideal supporting effect of the alloy, and meanwhile, has better corrosionresistance and is relatively uniform to corrode, wherein the corrosion rate is 0.18-0.42 mm / year.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a corrosion-resistant high-strength toughness magnesium alloy pipe and a preparation process. Background technique [0002] According to the statistics of the World Health Organization, by 2030, the number of people suffering from cardiovascular disease will reach 24 million. It can be seen that cardiovascular disease has become the main cause of death in the world. With the rapid development of medical technology in recent years, vascular stent implantation has become the most effective clinical treatment. The implanted stent is the technical core of the whole treatment process. The performance of the stent directly affects the effect of clinical treatment, and the alloy tube used to prepare the stent is a key factor in determining the quality of the stent. [0003] Currently clinically used vascular stents are mainly made of inert metal tubes such as s...

AI Technical Summary

Problems solved by technology

It solves the problem of poor deformation ability of magnesium alloy pipes at room temperature and difficult plastic processing when used to prepare stents in the prior art. While achieving the ideal support effect of the alloy, it can also be degraded uniformly in the body and has better Corrosion resistance, and the corrosion is relatively uniform, the corrosion rate is 0.18 ~ 0.42mm / year

Images