CN107699813A - A kind of stainless steel with antibacterial functions - Google Patents
A kind of stainless steel with antibacterial functions Download PDFInfo
- Publication number
- CN107699813A CN107699813A CN201711200653.4A CN201711200653A CN107699813A CN 107699813 A CN107699813 A CN 107699813A CN 201711200653 A CN201711200653 A CN 201711200653A CN 107699813 A CN107699813 A CN 107699813A
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- Prior art keywords
- stainless steel
- copper
- antibacterial functions
- layer
- top layer
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/48—Ion implantation
Abstract
The invention discloses a kind of stainless steel with antibacterial functions, including basic unit and top layer, the basic unit is austenitic stainless steel, top layer is copper infiltrated alloy layer, austenitic stainless steel main component is 0.060 0.080wt%C, 17.35 18.05wt%Cr, 6.50 7.00wt%Ni, copper infiltrated alloy thickness degree is 2.5 3.0 μm, the 5.50wt% of Cu contents 5.20.The present invention is using plasma surface alloying and aura bombardment thermal diffusion composite treatment technology, the alloy-layer of surface cupric has been prepared in stainless steel surfaces, obtained 3.0 μm of stainless steel antimicrobial surface thickness, surface cupric mass percent is 5.26%, has reached 99.9% to the sterilizing rate of Escherichia coli and staphylococcus aureus.
Description
Technical field
The present invention relates to a kind of stainless steel with antibacterial functions, belong to metal material processing field.
Background technology
The corrosion resistance and intensity that stainless steel has had by it, thus be widely used in manufacturing the Medical treatment devices such as scalpel
Tool, but want to apply to health field and also need to that there is excellent anti-microbial property.Method common at present is given birth in stainless steel
Some metallic elements (such as silver, copper) with antibacterial action are directly added during production, then are by special antimicrobial treatment
It can make the stainless steel there is antibiotic property, but this overall smelting process complex process, and low melting point silver/copper alloying element adds
Add, be easily caused the deterioration of stainless steel overall mechanical properties.The region that antibacterial functions are played during actual use is itself and other media
The surface of contact, therefore, it may be considered that pass through the antibacterial ability of surface Modified lift stainless steel.
The content of the invention
In view of the above-mentioned problems of the prior art, it is an object of the invention to provide a kind of stainless with antibacterial functions
Steel, stainless steel can be made to obtain anti-microbial property in the case where not influenceing the overall mechanical properties of stainless steel.
To achieve the above object, the technical solution adopted by the present invention is：A kind of stainless steel with antibacterial functions, including base
Layer and top layer, the basic unit are austenitic stainless steel, and top layer is copper infiltrated alloy layer, and austenitic stainless steel main component is 0.060-
0.080wt%C, 17.35-18.05wt%Cr, 6.50-7.00wt%Ni, copper infiltrated alloy thickness degree are 2.5-3.0 μm, Cu contents
5.20-5.50wt%.
As the present invention a preferred scheme, the austenitic stainless steel main component be 0.060wt%C,
17.35wt%Cr, 6.50wt%Ni.
As the preferred scheme of the present invention, the copper infiltrated alloy thickness degree is 3.0 μm, Cu contents 5.50wt%.
The plasma surface metallurgical technology that the application uses, due to the bombardment of ion pair workpiece surface, causes metallic matrix
Top layer forms the crystal defect layer in a large amount of rooms, and so as to dissolve in more alloying elements, it is dense to form room in matrix skin
Spend gradient in addition, during plasma surface alloying, it is blunt that bombardment of the argon ion to workpiece surface can eat away oxide on surface etc.
Change layer, constantly activate workpiece surface, adsorption capacity of the enhancing matrix to metal ion.
During plasma surface alloying, copper is easy to sputter out from cathode surface, that is, forms reverse sputtering.
Because solid solubility of the copper in stainless steel is very low, diffusion of the copper to stainless steel base can be restricted, and copper itself sputtering raste is very high, can
To provide sufficient quantity delivered, so as to which sedimentary can be formed in stainless steel surfaces.Therefore, this experiment is using in stainless steel surfaces shape
Into after certain copper concentration gradient, the supply of source electrode cut-out copper is closed, is bombarded by workpiece pole glow plasma
And thermal diffusion effect makes copper continue to spread to intrinsic silicon.
The present invention is using plasma surface alloying and aura bombardment thermal diffusion composite treatment technology, in stainless steel surfaces system
The standby alloy-layer for obtaining surface cupric, obtained 3.0 μm of stainless steel antimicrobial surface thickness, surface cupric mass percent are
5.26%, 99.9% has been reached to the sterilizing rate of Escherichia coli and staphylococcus aureus.
Embodiment
The present invention is described in further detail with reference to embodiment.
Embodiment 1
The processing method of anti-bacteria stainless steel comprises the following steps：
(1) austenite stainless steel curved beam polished with sand paper, be polished to 0.03 μm of surface roughness Ra ＜；
(2) austenite stainless steel curved beam is placed in surface alloying equipment, final vacuum ＜ 6.7 × 10-2Pa, workpiece
Voltage -550~-600V；A small amount of nitrogen is filled with, applies DC voltage between negative electrode and source electrode, produces glow discharge, bombardment is clear
Sample and fine copper target material surface are managed, sample is heated up using the hollow cathode effect formed between negative electrode and source electrode, specimen temperature liter
During to 900 DEG C, adjustment is cloudy, the pole tension of source two, temperature is kept stable and carries out oozing copper, source voltage is closed after being incubated 60min；
(3) adjustment cathode voltage makes specimen temperature be maintained at 800 DEG C, after being incubated 3h, closes cathode voltage, sample is cold with stove
But.
The anti-microbial property of sample is tested, strain used is Escherichia coli and staphylococcus aureus, test procedure
It is as follows：
(1) by the control sample after being cleaned with ethanol and the sample of embodiment 1 the autoclaving 20min at 121 DEG C respectively；
(2) by the bacterium solution normal saline dilution after inoculation into concentration be 105Cfu/mL bacterium solution, and respectively by 0.4mL
Bacterium solution uniformly drop to copper alloy sample and control sample surface；
(3) will be placed in respectively after the test sample for having dripped bacterium solution and bacterium solution effect 1-12h in culture dish, it is anti-with physiological saline
Specimen surface is rinsed again, and bacterium solution is diluted into 3 gradient after well mixed takes 0.1mL to drop to from the bacterium solution after dilution respectively
In the solid medium to sterilize in advance, bacterium solution is evenly coated in media surface with spreading rod；
(4) solid medium for having applied bacterium solution is positioned in the incubator that temperature is 37 DEG C and cultivates 18h, measure each training
The bacterium colony number in ware is supported, calculates antibiotic rate；Antibiotic rate=100% × [(λ 0- λ t)/λ 0], wherein, λ 0 is right after antibacterial experiment
According to the clump count of specimen surface, λ t are the clump count of the application specimen surface after antibacterial experiment.
After testing, with the extension of time of contact, the application to the antibiotic rate of Escherichia coli and staphylococcus aureus by
It is cumulative big.After time of contact reaches 12h, stainless steel all reaches 99.9% to the sterilizing rate of two kinds of bacteriums.
Analyzed through EDS, surface cupric mass percent is 5.20%, illustrates that Cu has penetrated into stainless steel surfaces, the surface
The copper ion of copper ion dissolutions can be slowly discharged when being contacted with bacterium solution to be had an effect with the cell membrane of bacterium, afterwards and bacterium
DNA molecular be combined, the metabolic process of bacterium is destroyed, so as to have the function that sterilization.
Embodiment 2
The processing method of anti-bacteria stainless steel, comprises the following steps：
(1) austenite stainless steel curved beam polished with sand paper, be polished to 0.03 μm of surface roughness Ra ＜；
(2) austenite stainless steel curved beam is placed in surface alloying equipment, final vacuum ＜ 6.7 × 10-2Pa, workpiece
Voltage -550~-600V；A small amount of nitrogen is filled with, applies DC voltage between negative electrode and source electrode, produces glow discharge, bombardment is clear
Sample and fine copper target material surface are managed, sample is heated up using the hollow cathode effect formed between negative electrode and source electrode, specimen temperature liter
During to 1000 DEG C, adjustment is cloudy, the pole tension of source two, temperature is kept stable and carries out oozing copper, source voltage is closed after being incubated 60min；
(3) adjustment cathode voltage makes specimen temperature be maintained at 900 DEG C, after being incubated 3h, closes cathode voltage, sample is cold with stove
But.
Sample manufactured in the present embodiment is tested, as a result similar with embodiment 1, surface cupric mass percent is
5.50%.
Embodiment 3
The processing method of anti-bacteria stainless steel, comprises the following steps：
(1) austenite stainless steel curved beam polished with sand paper, be polished to 0.03 μm of surface roughness Ra ＜；
(2) austenite stainless steel curved beam is placed in surface alloying equipment, final vacuum ＜ 6.7 × 10-2Pa, workpiece
Voltage -550~-600V；A small amount of nitrogen is filled with, applies DC voltage between negative electrode and source electrode, produces glow discharge, bombardment is clear
Sample and fine copper target material surface are managed, sample is heated up using the hollow cathode effect formed between negative electrode and source electrode, specimen temperature liter
During to 950 DEG C, adjustment is cloudy, the pole tension of source two, temperature is kept stable and carries out oozing copper, source voltage is closed after being incubated 60min；
(3) adjustment cathode voltage makes specimen temperature be maintained at 850 DEG C, after being incubated 3h, closes cathode voltage, sample is cold with stove
But.
Sample manufactured in the present embodiment is tested, as a result similar with embodiment 1, surface cupric mass percent is
5.26%.
Claims (3)
1. a kind of stainless steel with antibacterial functions, it is characterised in that including basic unit and top layer, the basic unit is austenite stainless
Steel, top layer are copper infiltrated alloy layer, austenitic stainless steel main component be 0.060-0.080wt%C, 17.35-18.05wt%Cr,
6.50-7.00wt%Ni, copper infiltrated alloy thickness degree are 2.5-3.0 μm, Cu contents 5.20-5.50wt%.
A kind of 2. stainless steel with antibacterial functions according to claim 1, it is characterised in that the austenitic stainless steel
Main component is 0.060wt%C, 17.35wt%Cr, 6.50wt%Ni.
A kind of 3. stainless steel with antibacterial functions according to claim 1, it is characterised in that the copper infiltrated alloy thickness
Spend for 3.0 μm, Cu contents 5.50wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711200653.4A CN107699813A (en) | 2017-11-27 | 2017-11-27 | A kind of stainless steel with antibacterial functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711200653.4A CN107699813A (en) | 2017-11-27 | 2017-11-27 | A kind of stainless steel with antibacterial functions |
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| Publication Number | Publication Date |
|---|---|
| CN107699813A true CN107699813A (en) | 2018-02-16 |
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| CN201711200653.4A Withdrawn CN107699813A (en) | 2017-11-27 | 2017-11-27 | A kind of stainless steel with antibacterial functions |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112662946A (en) * | 2020-12-10 | 2021-04-16 | 成都典惟宁建筑科技有限公司 | Corrosion-resistant bridge steel and preparation method thereof |
| CN113201684A (en) * | 2021-03-15 | 2021-08-03 | 宁波市华涛不锈钢管材有限公司 | Antibacterial thin-wall stainless steel pipe and preparation method thereof |
| CN114717508A (en) * | 2020-12-22 | 2022-07-08 | 武汉苏泊尔炊具有限公司 | Antibacterial cutter and manufacturing method thereof |
| CN115927974A (en) * | 2022-12-13 | 2023-04-07 | 江苏鸿泰钢铁有限公司 | Forming method of corrosion-resistant building steel |
-
2017
- 2017-11-27 CN CN201711200653.4A patent/CN107699813A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112662946A (en) * | 2020-12-10 | 2021-04-16 | 成都典惟宁建筑科技有限公司 | Corrosion-resistant bridge steel and preparation method thereof |
| CN114717508A (en) * | 2020-12-22 | 2022-07-08 | 武汉苏泊尔炊具有限公司 | Antibacterial cutter and manufacturing method thereof |
| CN113201684A (en) * | 2021-03-15 | 2021-08-03 | 宁波市华涛不锈钢管材有限公司 | Antibacterial thin-wall stainless steel pipe and preparation method thereof |
| CN115927974A (en) * | 2022-12-13 | 2023-04-07 | 江苏鸿泰钢铁有限公司 | Forming method of corrosion-resistant building steel |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180216 |
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| WW01 | Invention patent application withdrawn after publication |