A method of processing cobalt-base alloy superfine thin-walled tubes for stents
A technology of cobalt-based alloys and processing methods, applied in metal processing equipment, metal rolling, manufacturing tools, etc., can solve the problems of low pipe yield and difficult pipe processing, achieve excellent mechanical properties, ensure critical deformation, Economical effect
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[0023] The processing method of the cobalt-based alloy ultra-fine thin-walled tube for the bracket of the present invention, its technological process is: smelting → forging → hot rolling → hot rolling piercing → internal and external surface boring and grinding cleaning → annealing → cold rolling / drawing → annealing-cold rolling / drawing is repeated several times→finished product. Specific steps are as follows:
[0024] Step 1: The cobalt-based alloy is obtained by smelting in a vacuum induction furnace. Take the cobalt-based alloy ingot prepared by smelting, heat it to 1200°C in a protective atmosphere (argon) furnace, and then use a fast forging machine at 1180°C. Forged to a bar with a diameter of 50mm.
[0025] In this embodiment, by weight percentage, the cobalt-based alloy composition is:
[0026] C: 0.10; Cr: 20.0; Ni: 10.0; W: 15.0; Mn: 1.5; Fe: 1.0; Si: 0.20; P: 0.025;
[0027] Step 2: Reheat the hot-forged alloy bar to 1130° C. in a protective atmosphere (argon),...
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