Plastic processing method for magnesium alloy capillary tube

A technology for plastic processing and magnesium alloys, applied in metal processing equipment, metal extrusion control equipment, manufacturing tools, etc., can solve the problems of low strength of magnesium alloy capillary, unsatisfactory flatness, uneven tube wall, etc. The effect of ideal straightness, low cost and uniform wall thickness

Inactive Publication Date: 2011-05-25
于洋
View PDF6 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of magnesium alloy capillary tubes in the prior art, such as low strength, poor plasticity, uneven tube wall, and unsatisfactory straightness, to provide a simple process, low cost, high processing efficiency, and The magnesium alloy capillary has good surface quality, uniform tube wall and ideal flatness. Plastic processing method of magnesium alloy capillary

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: A plastic processing method for a magnesium alloy capillary tube, which includes the following steps: (1) first select an AZ31 magnesium alloy billet with a casting purity greater than 99.99%, and put an AZ31 magnesium alloy casting billet with a diameter of 52×50 mm into a furnace for heating To 100°C, keep warm for 0.5 hours, preheat the bar extrusion die to 450°C, then put the AZ31 magnesium alloy casting billet into the bar extrusion die for extrusion, the extrusion ratio is 10.6, and the extrusion speed is 20mm / s. A Φ16 magnesium alloy extruded rod was obtained. In order to reduce friction during the extrusion process, the inner hole of the die of the extrusion die is lubricated with oil-based graphite. (2) Annealing the extruded magnesium alloy rods at 220°C for 2 hours; (3) Cut the above-mentioned annealed magnesium alloy rods into tubes with a length of 10-50mm, which are used as extruded capillaries Blank; (4) Put the tube blank in the above step...

Embodiment 2

[0009] Embodiment 2: A plastic processing method for a magnesium alloy capillary tube, which includes the following steps: (1) first select an AZ31 magnesium alloy billet with a casting purity greater than 99.99%, and put an AZ31 magnesium alloy casting billet with a diameter of 52×50mm into a furnace for heating To 200°C, keep warm for 0.8 hours, preheat the bar extrusion die to 350°C, then put the AZ31 magnesium alloy casting billet into the bar extrusion die for extrusion, the extrusion ratio is 16, and the extrusion speed is 26mm / s. A Φ13 magnesium alloy extruded rod was obtained. In order to reduce friction during the extrusion process, the inner hole of the die of the extrusion die is lubricated with oil-based graphite. (2) Anneal the extruded magnesium alloy rods at 300°C for 1 hour; (3) Cut the above-mentioned annealed magnesium alloy rods into 10-50mm lengths and process them into tube blanks, which are used as extruded capillaries Blank; (4) Put the tube blank in th...

Embodiment 3

[0011] Example 3: A plastic processing method for a magnesium alloy capillary tube, which includes the following steps: (1) first put an AZ31 magnesium alloy casting billet of Φ52×50mm into a furnace and heat it to 300°C, keep it warm for 1 hour, and preheat the bar Extrude the die to 300°C, then put the AZ31 magnesium alloy casting billet into the rod extrusion die for extrusion, the extrusion ratio is 25, and the extrusion speed is 30mm / s to obtain a Φ10.4 magnesium alloy extruded rod. In order to reduce friction during the extrusion process, the inner hole of the die of the extrusion die is lubricated with oil-based graphite. (2) Anneal the extruded magnesium alloy rods at 420°C for 0.5 hours; (3) Cut the above-mentioned annealed magnesium alloy rods into tube blanks with a length of 10-50 mm, and use them as extruded capillaries Blank; (4) Put the tube blank in the above step (3) into the split extrusion die for extrusion, the extrusion temperature is 100°C, the extrusion ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
lengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a plastic processing method for a magnesium alloy capillary tube, which comprises the following steps: heating a magnesium alloy casting billet to 100-300 DEG C, pre-heating a rod extrusion die to 300-450 DEG C, performing extrusion, controlling the extrusion ratio to be 10-25 and controlling the extrusion speed to be 20-30mm/s; intercepting a magnesium alloy rod with the length of 10-50mm after annealing, and processing into a tube blank; placing the tube blank into a divided flow extrusion die for extrusion under the conditions that the extrusion temperature is 100-300 DEG C, the extrusion ratio is 16-64 and the speed of a punch head of the extrusion die is 20-30mm/s, and getting the capillary tube with the wall thickness of 0.1-0.5mm and the length of 300-1000mm; and then performing destressing annealing treatment and getting the magnesium alloy capillary tube. The process is simple, the cost is low, the processing efficiency is high, the manufactured magnesium alloy capillary tube has good surface quality, the tube wall thickness is uniform, the flatness is ideal, structure is uniform, the mechanical properties are higher, and the plastic processing method can be used for manufacturing a stent in blood vessel.

Description

technical field [0001] The invention relates to a plastic processing method of a metal capillary, in particular to a plastic processing method of a magnesium alloy capillary. The processed magnesium alloy capillary can be used to make biodegradable intravascular stents. Background technique [0002] We know that magnesium alloy is gradually becoming the mainstream biodegradable medical coronary stent material due to its good biocompatibility, degradability and excellent mechanical properties, and has received national attention and support. In March 2009, Biotronik of Germany took the lead in launching a bioabsorbable metal magnesium stent, and the phase I clinical trial has achieved positive results, and a large-scale clinical trial is currently underway. At present, the biggest obstacle in the clinical practice in China is the forming of high-strength and tough magnesium alloy thin-walled capillary. Magnesium alloy thin tubes for stents are currently mainly prepared by p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21C31/00
Inventor 于洋张文丛
Owner 于洋
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap