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Method for increasing medical embedded stainless steel tube inner surface quality

A stainless steel and inner surface technology, applied in the field of materials, can solve the problems of unsuitable medical implanted stainless steel pipes and inability to treat the inner surface of the pipes, and achieve the effects of good polishing effect, good corrosion resistance and high surface roughness.

Inactive Publication Date: 2008-03-26
CHANGSHU MICROTUBE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a method cannot deal with the inner surface of the pipe, and is not suitable for the inner surface of medical implant stainless steel pipes with small diameter features.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A medical implant stainless steel pipe (vascular stent pipe) with an outer diameter of 1.575mm, a wall thickness of 0.127mm, and a component grade of 316L is processed through the following steps:

[0014] (1) Immerse the self-made treatment solution in the treatment tank. The treatment solution is obtained by mixing ordinary stainless steel pickling solution and 1% by volume of nano-alumina particles.

[0015] (2) Put the pipe into a treatment tank and heat to 50°C.

[0016] (3) Use a water pump to inject the treatment hydraulic pressure into the pipe and make it circulate. The treatment time is 0.5 minutes.

[0017] (4) After taking it out, rinse it with running water.

[0018] The inner surface of the pipe obtained through the above steps is bright, the surface roughness is less than 5um, and the polishing thickness is about 1um, which is basically close to the mirror effect.

Embodiment 2

[0020] A medical implant stainless steel pipe (vascular stent pipe) with an outer diameter of 1.575mm, a wall thickness of 0.127mm, and a component grade of 316L is processed through the following steps:

[0021] (1) Immerse the self-made treatment solution in the treatment tank. The treatment liquid is obtained by mixing ordinary stainless steel pickling liquid and 10% by volume of nano-alumina particles.

[0022] (2) Put the pipe into a treatment tank and heat to 80°C.

[0023] (3) Use a water pump to inject the treatment hydraulic pressure into the pipe and make it circulate. The treatment time is 30 minutes.

[0024] (4) After taking it out, rinse it with running water.

[0025] The inner surface of the pipe obtained through the above steps is very bright, the surface roughness is less than 0.5um, and the thickness is reduced by about 10um by polishing to achieve a perfect mirror effect.

Embodiment 3

[0027] A medical implant stainless steel pipe (vascular stent pipe) with an outer diameter of 1.575mm, a wall thickness of 0.127mm, and a component grade of 316L is processed through the following steps:

[0028] (1) Immerse the self-made treatment solution in the treatment tank. The treatment liquid is obtained by mixing ordinary stainless steel pickling liquid and 20% by volume of nano-alumina particles.

[0029] (2) Put the pipe into a treatment tank, and heat to 100°C.

[0030] (3) Use a water pump to inject the treatment hydraulic pressure into the pipe and make it circulate. The treatment time is 60 minutes.

[0031] (4) After taking it out, rinse it with running water.

[0032] The inner surface of the pipe obtained through the above steps is very bright, the surface roughness is less than 0.2um, and the thickness is reduced by about 50um by polishing to achieve a perfect mirror effect.

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PUM

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Abstract

The process of treating medical implanted stainless steel pipe in high inner surface quality includes soaking medical implanted stainless steel pipe in mixed treating fluid comprising stainless steel pickling solution and nanometer alumina particle inside a treating trough, heating the treating fluid to 50-100 deg.c, pressing the treating fluid into the pipe and circulating with a water pump, treating for 0.5-60 min, and flushing the taken out pipe with flowing water. Compared with available technology, the present invention has the advantages of high polishing effect, excellent anticorrosive performance, wide application range and other features.

Description

technical field [0001] The invention relates to a method for improving surface quality in the field of materials, in particular to a method for improving the inner surface quality of medically implanted stainless steel pipes. Background technique [0002] Various types and specifications of stainless steel metal materials have been widely used in the medical field. For example, vascular stents for interventional therapy are made of fine stainless steel tubes, which are then manufactured by laser cutting and electrochemical polishing. However, at present, the stainless steel pipes produced by the general process have various defects or deficiencies such as dimensional accuracy and surface quality, especially micro-oxidation, small burrs, processing marks or wrinkles on the inner surface, and are not easy to handle, which restricts They are used in many implant medical fields such as interventional medicine. Therefore, it is of great significance to improve the surface quality...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F3/06A61F2/82A61F2/91
Inventor 张小农
Owner CHANGSHU MICROTUBE TECH
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