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A kind of processing method of medical 316l stainless steel surface

A treatment method and stainless steel technology, applied in pharmaceutical formulations, pharmaceutical science, metal material coating technology and other directions, can solve the problems of limited coating service life, thermodynamic instability, and insufficient binding force, and achieve improved thermodynamic stability, The effect of improving the service life and antibacterial performance, and reducing the generation of impurities

Active Publication Date: 2019-04-30
ANHUI BAOHENG ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a commonly used surface treatment technology for 316L stainless steel is plasma spraying. The sprayed powder is hydroxyapatite. Amorphous and thermally decomposed into other calcium phosphate salts, affecting their biological activity
In addition, the thermal expansion coefficient of hydroxyapatite does not match that of 316LSS, resulting in insufficient bonding between hydroxyapatite and the substrate. In clinical practice, the coating often peels off, which greatly limits the service life of the coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A processing method for medical 316L stainless steel surface, comprising the following steps:

[0019] (1) Soak 316L stainless steel in the soaking solution for 2 hours, take it out, put it into an ethanol solution with a volume fraction of 70%, and use ultrasonic treatment for 10 minutes, then wash it with distilled water;

[0020] (2) Rapidly melting the prepared modified hydroxyapatite with plasma flow;

[0021] (3) Spray the molten modified hydroxyapatite on the surface of the soaked 316L stainless steel;

[0022] (4) After the modified hydroxyapatite is solidified on the surface of 316L stainless steel, irradiate with ultraviolet rays for 10 minutes to obtain medical 316L stainless steel;

[0023] The above soaking solution is made of the following components in parts by weight: 1-3 parts of sodium molybdate dihydrate, 12 parts of sodium ethylenediaminopropanesulfonate, 0.6 parts of benzyltrimethylammonium bromide, imazalil sulfate 2 parts, 0.5 parts of 2,3-dibro...

Embodiment 2

[0028] A processing method for medical 316L stainless steel surface, comprising the following steps:

[0029] (1) Soak the 316L stainless steel in the soaking solution for 2.5 hours, take it out, put it in an ethanol solution with a volume fraction of 70%, use ultrasonic treatment for 10 minutes, and then wash it with distilled water;

[0030] (2) Rapidly melting the prepared modified hydroxyapatite with plasma flow;

[0031] (3) Spray the molten modified hydroxyapatite on the surface of the soaked 316L stainless steel;

[0032] (4) After the modified hydroxyapatite is solidified on the surface of 316L stainless steel, irradiate with ultraviolet rays for 10 minutes to obtain medical 316L stainless steel;

[0033] The above soaking solution is made of the following components in parts by weight: 2 parts of sodium molybdate dihydrate, 14 parts of sodium ethylenediaminopropanesulfonate, 0.7 parts of benzyltrimethylammonium bromide, and 3 parts of imazalil sulfate , 0.6 parts of...

Embodiment 3

[0038] A processing method for medical 316L stainless steel surface, comprising the following steps:

[0039] (1) Soak 316L stainless steel in the soaking solution for 3 hours, take it out, put it into an ethanol solution with a volume fraction of 70%, and use ultrasonic treatment for 10 minutes, then wash it with distilled water;

[0040] (2) Rapidly melting the prepared modified hydroxyapatite with plasma flow;

[0041] (3) Spray the molten modified hydroxyapatite on the surface of the soaked 316L stainless steel;

[0042](4) After the modified hydroxyapatite is solidified on the surface of 316L stainless steel, irradiate with ultraviolet rays for 10 minutes to obtain medical 316L stainless steel;

[0043] The above soaking solution is made of the following components in parts by weight: 3 parts of sodium molybdate dihydrate, 16 parts of sodium ethylenediaminopropanesulfonate, 0.8 parts of benzyltrimethylammonium bromide, and 4 parts of imazalil sulfate , 0.7 parts of 2,3-...

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Abstract

The invention discloses a processing treatment method for the surface of medical 316L stainless steel. The method includes the following steps that (1) the 316L stainless steel is put in soaking liquid to be soaked for 2-3 hours, then taken out, put in an ethanol solution with the volume percentage being 70%, subjected to ultrasonic treatment for 10 minutes and then washed through distilled water; (2) prepared modified hydroxyapatite is fast molten through plasma jet; (3) molten modified hydroxyapatite is sprayed to the surface of the soaked 316L stainless steel; and (4) after the modified hydroxyapatite is solidified on the surface of the 316L stainless steel, ultraviolet irradiation is performed for 10 minutes, and final medical 316L stainless steel is obtained. By means of the method provided by the invention, the obtained 316L stainless steel can have excellent chemical stability, corrosion resistance and antibacterial property, the thermodynamic stability of hydroxyapatite powder and the adhesive force on the surface of the stainless steel are improved, and the quality of the 316L stainless steel is greatly improved.

Description

technical field [0001] The invention belongs to the field of medical stainless steel manufacturing, in particular to a method for processing the surface of medical 316L stainless steel. Background technique [0002] Stainless steel is the earliest type of biological material. Among medical stainless steel materials, austenitic stainless steel is widely used because of its good mechanical properties, corrosion resistance and low price. Among them, 316L stainless steel is widely used in hard tissue repair and replacement materials due to its good biocompatibility, mechanical properties, ease of processing and corrosion resistance to body fluids. As a bone implant material, in long-term clinical use, it is still difficult to avoid some problems and deficiencies, such as 316LSS itself does not have biological activity, poor antibacterial performance, etc. As an artificial joint material, there is only a gap between the implant and the bone after implantation. Mechanical interlo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/04C23C4/02A61L27/32A61L27/50
CPCA61L27/32A61L27/50A61L2400/18A61L2430/02C23C4/02C23C4/04
Inventor 洪功正潘永刚蔡永波
Owner ANHUI BAOHENG ADVANCED MATERIAL TECH CO LTD