One-step forming processing method of magnesium alloy small-diameter thin-wall capillary tube used for vascular stent

One-step forming processing method of magnesium alloy small-diameter thin-wall capillary tube used for vascular stent

  • CN 105,964,716 A
  • Filed: 05/11/2016
  • Published: 09/28/2016
  • Est. Priority Date: 05/11/2016
  • Status: Active Application
First Claim
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1. the intravascular stent simultaneous manufacturing method of magnesium alloy fine-radial thin-walled capillary tubing, it is characterised in that comprise the steps:

  • (1) heat treatment of magnesium alloy extrusion blank;

    magnesium alloy extrusion blank is incubated under 400 DEG C of-500 DEG C of temperature conditionss 240h-480h;

    (2) design of mould;

    add an aligning pipe in extrusion die tube extrusion exit, the internal diameter of aligning pipe is identical with the external diameter of extrusion capillary tubes;

    (3) carrying out extrusion process according to required capillary tubes wall thickness;

    extrude as disposable thermal extruded, extrusion ratio scope is 100-400, and the extrusion billet after heat treatment, at 350 DEG C-450 DEG C, is directly extruded by mold preheating temperature;

    (4) rate of extrusion of capillary tubes;

    initial extrusion rates 150mm/s-200mm/s, blank constantly hardens afterwards, rate of extrusion is gradually reduced, until becoming 0, obtain external diameter be 1.5mm-3.5mm, wall thickness be the capillary tubes of 0.050mm-0.35mm, extruding postcapillary material cool down in atmosphere.

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