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Processing method for obtaining modified alloy layer on surface of stainless stain

A technology of surface modification and processing method, which is applied in the direction of metal material coating process, coating, ion implantation plating, etc., and can solve problems such as complex process and overall mechanical property degradation of stainless steel

Inactive Publication Date: 2018-11-06
徐州市贾汪区怀强工贸有限公司
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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

[0014] A processing method for obtaining a modified alloy layer on a stainless steel surface, comprising the steps of:

[0015] (1) Grinding and polishing the austenitic stainless steel sample with sandpaper to a surface roughness of Ra<0.06 μm;

[0016] (2) Place the austenitic stainless steel sample in the surface alloying equipment, and the ultimate vacuum degree is -2 Pa, workpiece voltage -500~-600V; fill a small amount of Ar gas, 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 formation between the cathode and the source The hollow cathode effect of the sample heats up the temperature of the sample. When the temperature of the sample rises to 800 ° C, adjust the cathode and source voltages to keep the temperature stable for copper infiltration. After 2 hours of heat preservation, the source voltage and cathode voltage are turned off, and the sample is cooled wit...

Embodiment 2

[0025] The processing method for obtaining the surface modified alloy layer of stainless steel comprises the following steps:

[0026] (1) Grinding and polishing the austenitic stainless steel sample with sandpaper to a surface roughness of Ra<0.06 μm;

[0027] (2) Place the austenitic stainless steel sample in the surface alloying equipment, and the ultimate vacuum degree is -2 Pa, workpiece voltage -500~-600V; fill a small amount of Ar gas, 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 formation between the cathode and the source The hollow cathode effect of the sample heats up the temperature of the sample. When the sample temperature rises to 900 ° C, adjust the cathode and source voltages to keep the temperature stable for copper infiltration. After 2 hours of heat preservation, the source voltage and cathode voltage are turned off, and the sample is cooled wit...

Embodiment 3

[0030] A processing method for obtaining a modified alloy layer on a stainless steel surface comprises the following steps:

[0031] (1) Grinding and polishing the austenitic stainless steel sample with sandpaper to a surface roughness of Ra<0.06 μm;

[0032] (2) Place the austenitic stainless steel sample in the surface alloying equipment, and the ultimate vacuum degree is -2 Pa, workpiece voltage -500~-600V; fill a small amount of Ar gas, 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 formation between the cathode and the source The hollow cathode effect of the sample heats up the temperature of the sample. When the sample temperature rises to 900 ° C, adjust the cathode and source voltages to keep the temperature stable for copper infiltration. After 2 hours of heat preservation, the source voltage and cathode voltage are turned off, and the sample is cooled with ...

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Abstract

The invention discloses a processing method for obtaining a modified alloy layer on the surface of stainless stain. The processing method comprises the following steps: polishing an austenitic stainless steel test sample with abrasive paper until the surface roughness Ra is smaller than 0.06 mu m; putting the austenitic stainless steel test sample in surface alloying equipment, introducing a smallamount of Ar gas, applying direct-current voltage between a cathode and a source electrode to generate glow discharge, bombarding and cleaning the surfaces of the test sample and a pure copper target, heating the test sample through a hollow cathode effect formed between the cathode and the source electrode, when the temperature of the test sample is increased to 800-900 DEG C, adjusting the voltages of the cathode and the source electrode to enable the temperature to be kept stable to perform copper infiltration, shutting down the voltages of the source electrode and the cathode after preserving heat for 2 hours, and cooling the test sample along with a furnace. A plasma surface alloying technology is adopted, an alloy layer with copper contained on the surface is obtained on the surfaceof the stainless stain, the thickness of the antibacterial layer of the prepared stainless steel is 1.3-1.4 mu m, the mass percent of copper contained on the surface is 3.00%, and the alloy layer hasa certain antibacterial effect on escherichia coli and staphylococcus aureus.

Description

technical field [0001] The invention relates to a processing method for obtaining a modified alloy layer on the surface of stainless steel, belonging 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 abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/02C23C14/16C23C14/34
CPCC23C14/022C23C14/165
Inventor 庄怀强
Owner 徐州市贾汪区怀强工贸有限公司
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