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Rolling machining method of small-specification high-strength cobalt-based alloy pipe

A cobalt-based alloy and processing method technology, applied in the field of cobalt-based alloy material processing, can solve the problems of difficult preparation, high work hardening rate, high strength of cobalt-based alloy, etc., achieve good surface quality, increase deformation, and reduce costs Effect

Active Publication Date: 2020-01-10
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high strength and high work hardening rate of cobalt-based alloys make it difficult to prepare small-sized pipes by conventional processing methods

Method used

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  • Rolling machining method of small-specification high-strength cobalt-based alloy pipe
  • Rolling machining method of small-specification high-strength cobalt-based alloy pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment includes the following steps:

[0031] Step 1. Tube blank preparation: Place a Co-20Cr-15W-10Ni (L605) cobalt-based alloy tube blank with a size of 45mm×5.0mm (outer diameter×wall thickness) prepared by centrifugal casting in a tubular annealing furnace Carry out solution treatment, and then carry out rapid cooling with argon filling; the temperature of the solution treatment is 1300°C, the holding time is 60min, and the solution treatment is carried out under the protection of argon;

[0032] Step 2, surface treatment: use a flame gun to heat the rapidly cooled L605 cobalt-based alloy tube blank in step 1 until the surface turns red, and then evenly coat the lubricant on the inside and outside of the heated L605 cobalt-based alloy tube blank. The outer surface is dried at a temperature of 250°C; the lubricant is mixed with graphite and water, wherein the mass content of graphite is 20%;

[0033] Step 3, hot rolling: Turn on the rolling mill, use a gas fl...

Embodiment 2

[0037] This embodiment includes the following steps:

[0038] Step 1, tube blank preparation: the forged Co-28Cr-6Mo cobalt-based alloy tube blank with a size of 30mm×3.0mm (outer diameter×wall thickness) prepared by centrifugal casting method is placed in a tubular annealing furnace for solid solution treatment , and then carry out rapid cooling with argon filling; the temperature of the solution treatment is 1150°C, the holding time is 45min, and the solution treatment is carried out under vacuum conditions;

[0039] Step 2. Surface treatment: use a flame gun to heat the forged Co-28Cr-6Mo cobalt-based alloy tube billet that has been rapidly cooled with argon in step 1 until the surface turns red, and then evenly coat the lubricant on the heated Co- The inner and outer surfaces of the 28Cr-6Mo cobalt-based alloy tube blank are dried at a temperature of 200° C.; the lubricant is mixed with graphite and water, wherein the mass content of graphite is 25%;

[0040] Step 3, hot ...

Embodiment 3

[0044] This embodiment includes the following steps:

[0045] Step 1. Tube blank preparation: Place the Co-19Cr-17Ni-14Fe-7Mo-1.5Mn (Phynox) cobalt-based alloy tube blank with a size of 25mm×2.0mm (outer diameter×wall thickness) prepared by powder sintering method in Solution treatment is carried out in a tubular annealing furnace, followed by quick cooling with argon filling; the solution treatment temperature is 1000°C, the holding time is 30min, and the solution treatment is carried out under the protection of argon;

[0046] Step 2, surface treatment: use a flame gun to heat the rapidly cooled Phynox cobalt-based alloy tube blank in step 1 until the surface turns red, and then evenly coat the lubricant on the inside and outside of the heated Phynox cobalt-based alloy tube blank. The outer surface is dried at a temperature of 150°C; the lubricant is mixed with graphite and water, wherein the mass content of graphite is 40%;

[0047] Step 3, hot rolling: Turn on the rolling...

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Abstract

The invention discloses a rolling machining method of a small-specification high-strength cobalt-based alloy pipe. The rolling machining method comprises the following steps of firstly, after solutiontreatment is carried out on a cobalt-based alloy pipe blank, the cobalt-based alloy pipe blank is cooled; secondly, the cooled cobalt-based alloy pipe blank is heated and coated with a lubricant fordrying; thirdly, hot rolling is carried out on a die of a rolling mill and the dried cobalt-based alloy pipe blank to obtain a cobalt-based alloy pipe intermediate; and fourthly, the cobalt-based alloy pipe intermediate is cold-rolled and straightened and acid-washed to obtain the cobalt-based alloy pipe. According to the method, the cobalt-based alloy pipe intermediate product with a smaller sizeis obtained through hot rolling of a large deformation amount, and then the dimensional precision of the cobalt-based alloy pipe is controlled through the cold rolling of a small deformation amount,so that the small-specification high-strength cobalt-based alloy pipe with good surface quality, high wall thickness uniformity and excellent comprehensive mechanical property is obtained, and the method is suitable for medical support materials.

Description

technical field [0001] The invention belongs to the technical field of processing cobalt-based alloy materials, and in particular relates to a rolling processing method for small-sized high-strength cobalt-based alloy pipes. Background technique [0002] At present, cardiovascular and cerebrovascular diseases have become the number one killer threatening human life and health, and worldwide, the incidence of cardiovascular and cerebrovascular diseases is increasing year by year. Percutaneous transluminal coronary angioplasty (PTCA) is the first choice for non-drug treatment of coronary heart disease. effective means. A large number of clinical studies have proved that intracoronary stent implantation can reduce the acute vascular occlusion rate of PTCA to less than 3%, and the restenosis rate to less than 15%. At home and abroad, the emergence of minimally invasive interventional surgery and related precision medical devices, as well as other measures taken, have greatly re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06
CPCB21C37/06
Inventor 于振涛张亚峰刘汉源余森荆磊王昌赵利渊
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH