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Processing method for obtaining alloy layer through modifying surface of stainless steel

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

Inactive Publication Date: 2018-04-06
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

[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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PUM

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Abstract

The invention discloses a processing method for obtaining a modified alloy layer on the surface of stainless steel. The austenitic stainless steel sample is ground and polished with sandpaper until the surface roughness Ra<0.06 μm; the austenitic stainless steel sample is placed on the surface for alloying In the equipment, a small amount of Ar gas is filled, a DC voltage is applied between the cathode and the source, a glow discharge is generated, the surface of the sample and the pure copper target is bombarded, and the hollow cathode effect formed between the cathode and the source is used to make the sample When the temperature of the sample rises to 800-900°C, adjust the cathode and source voltages to keep the temperature stable for copper infiltration. After holding for 2 hours, turn off the source voltage and cathode voltage, and the sample is cooled with the furnace. The present invention adopts the plasma surface alloying technology, prepares and obtains an alloy layer containing copper on the surface of stainless steel, and the thickness of the antibacterial surface layer of the prepared stainless steel is 1.3-1.4 μm, and the mass percentage of copper on the surface is 3.00%, which is effective against Escherichia coli and golden yellow Staphylococcus showed some antibacterial effect.

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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IPC IPC(8): C23C10/28C23C10/02C22C38/40
CPCC23C10/28C22C38/40C23C10/02
Inventor 王兆民
Owner 徐州新永嘉特种金属科技有限公司
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