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Processing method of antibacterial stainless steel

A technology of antibacterial stainless steel and processing method, which is applied in the direction of metal material coating process, ion implantation plating, coating, etc., can solve the problems of complex process, deterioration of overall mechanical properties of stainless steel, etc., and achieve good antibacterial effect

Inactive Publication Date: 2018-02-27
徐州新永嘉特种金属科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current common method is to directly add some antibacterial metal elements (such as silver, copper, etc.) And the addition of low melting point silver / copper alloy elements can easily lead to the deterioration of the overall mechanical properties of stainless steel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The processing method of antibacterial stainless steel comprises the steps:

[0017] (1) Grinding and polishing the austenitic stainless steel sample with sandpaper to a surface roughness of Ra<0.03 μm;

[0018] (2) Place the austenitic stainless steel sample in the surface alloying equipment, and the ultimate vacuum degree is -2 Pa, workpiece voltage -550~-600V; fill a small amount of nitrogen, apply a DC voltage between the cathode and the source, generate glow discharge, bombard and clean the surface of the sample and pure copper target, and use the gap formed between the cathode and the source The hollow cathode effect causes the sample to heat up. When the sample temperature rises to 900°C, adjust the cathode and source voltages to keep the temperature stable for copper infiltration, and turn off the source voltage after holding for 60 minutes;

[0019] (3) Adjust the cathode voltage to keep the temperature of the sample at 800°C. After holding the temperature for ...

Embodiment 2

[0028] The processing method of antibacterial stainless steel comprises the steps:

[0029] (1) Grinding and polishing the austenitic stainless steel sample with sandpaper to a surface roughness of Ra<0.03 μm;

[0030] (2) Place the austenitic stainless steel sample in the surface alloying equipment, and the ultimate vacuum degree is -2 Pa, workpiece voltage -550~-600V; fill a small amount of nitrogen, apply a DC voltage between the cathode and the source, generate glow discharge, bombard and clean the surface of the sample and pure copper target, and use the gap formed between the cathode and the source The hollow cathode effect causes the sample to heat up. When the sample temperature rises to 1000°C, adjust the cathode and source voltages to keep the temperature stable for copper infiltration, and turn off the source voltage after holding for 60 minutes;

[0031] (3) Adjust the cathode voltage to keep the temperature of the sample at 900°C. After holding the temperature for...

Embodiment 3

[0034] The processing method of antibacterial stainless steel comprises the steps:

[0035] (1) Grinding and polishing the austenitic stainless steel sample with sandpaper to a surface roughness of Ra<0.03 μm;

[0036] (2) Place the austenitic stainless steel sample in the surface alloying equipment, and the ultimate vacuum degree is -2 Pa, workpiece voltage -550~-600V; fill a small amount of nitrogen, apply a DC voltage between the cathode and the source, generate glow discharge, bombard and clean the surface of the sample and pure copper target, and use the gap formed between the cathode and the source The hollow cathode effect causes the sample to heat up. When the sample temperature rises to 950°C, adjust the cathode and source voltages to keep the temperature stable for copper infiltration, and turn off the source voltage after holding for 60 minutes;

[0037] (3) Adjust the cathode voltage to keep the temperature of the sample at 850°C. After holding the temperature for ...

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PUM

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Abstract

The invention discloses a processing method of antibacterial stainless steel. The austenitic stainless steel sample is placed in surface alloying equipment, filled with a small amount of nitrogen, and a direct current voltage is applied between the cathode and the source, and the surface of the sample is cleaned by bombardment. The hollow cathode effect formed between the cathode and the source causes the temperature of the sample to rise. When the temperature of the sample rises to 900-1000°C, adjust the voltage of the cathode and source to keep the temperature stable for copper infiltration, and turn off the source voltage after 60 minutes of heat preservation; adjust The cathode voltage keeps the temperature of the sample at 800-900°C. After 3 hours of heat preservation, the cathode voltage is turned off, and the sample is cooled with the furnace. The present invention adopts plasma surface alloying and glow bombardment thermal diffusion technology to prepare an alloy layer containing copper on the surface of stainless steel. The thickness of the antibacterial surface layer of stainless steel is 3.0 μm, and the mass percentage of copper on the surface is 5.26%. Bacillus and Staphylococcus aureus both showed good antibacterial effect.

Description

technical field [0001] The invention relates to a processing method of antibacterial stainless steel, which belongs to the field of metal material processing. Background technique [0002] Stainless steel is widely used in the manufacture of medical devices such as scalpels because of its good corrosion resistance and strength. However, it needs to have excellent antibacterial properties in order to be used in the hygiene field. The current common method is to directly add some antibacterial metal elements (such as silver, copper, etc.) And the addition of low melting point silver / copper alloy elements can easily lead to the deterioration of the overall mechanical properties of stainless steel. The area that exerts antibacterial function in actual use is the surface that is in contact with other media. Therefore, surface modification can be considered to improve antibacterial ability. Contents of the invention [0003] In view of the above-mentioned problems in the prior...

Claims

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Application Information

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IPC IPC(8): C23C14/34C23C14/16
CPCC23C14/34C23C14/165
Inventor 王兆民
Owner 徐州新永嘉特种金属科技有限公司
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