CN101054651A - Austenitic stainless steel with excellent anti-bacterium capability - Google Patents
Austenitic stainless steel with excellent anti-bacterium capability Download PDFInfo
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- CN101054651A CN101054651A CN 200610046310 CN200610046310A CN101054651A CN 101054651 A CN101054651 A CN 101054651A CN 200610046310 CN200610046310 CN 200610046310 CN 200610046310 A CN200610046310 A CN 200610046310A CN 101054651 A CN101054651 A CN 101054651A
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Abstract
An austenite stainless steel with excellent antisepsis feature is characterized in containing 0.0005-0.20wt% Ag and 2.5-4.5 wt% Cu at the same time, wherein Ag exists in the form of fine Ag grains, oxide or sulfide and Cu partially or most exists in the form of Cu-enriched deposit. The invention solves the problems in techniques, cost and properties by only adding antiseptic elements, which hence further improves the antisepsis functions of the materials and optimizes the comprehensive performances thereof.
Description
Technical field:
The present invention relates to austenitic stainless steel, it is the anti-bacteria stainless steel of a kind of Ag of containing and two kinds of antiseptic elements of Cu, has good long-term antibacterial, need in the daily life can be applied to the various fields of antimicrobial, as galley equipment, dining utensil, medicine equipment, food-processing and pharmaceutical machine and communal facility etc.
Background technology:
Along with the development of society and the raising of people's living standard, antibiotic industry development is rapid.But antimicrobial prod in the market mostly is by adding antibiotic plastic that antiseptic-germicide makes, anti-bacteria ceramic, antibiotic fabric etc., rarely has high strength and resistant to elevated temperatures metal antibacterial material.Anti-bacteria stainless steel has antibacterial, decoration function and structured material function concurrently, can be used to make the goods that require high strength, corrosion-resistant, high temperature resistant, rub resistance, is the ideal anti-biotic material, thereby widespread use in daily life.Now existing single Cu of containing or the single report that contains the anti-bacteria stainless steel of Ag.Cu and Ag are the element with antibacterial, the especially Ag that people know, its antibacterial even than high 2 orders of magnitude of Cu.But Ag costs an arm and a leg, and the solubleness in stainless steel is extremely low, is difficult to obtain enough recovery rates with conventional metallurgical technology, adopts special smelting technology can increase substantially cost; Can realize that the antibiotic disperse in stainless steel of Cu distributes by the method that the supersaturated solid solution precipitation is separated out, precipitated phase is many more, and anti-microbial property is strong more.But the Cu precipitated phase significantly reduces stainless etch resistant properties in the existence meeting on surface, precipitated phase the more, etch resistant properties descends more obviously.
Summary of the invention:
The object of the present invention is to provide a kind of austenitic stainless steel, solve the shortcoming that single interpolation antiseptic elements exists at technology, cost and aspect of performance, thereby further improve the over-all properties of the anti-microbial property and the optimization material of material with excellent anti-bacterium capability.
The present invention specifically provides a kind of austenitic stainless steel with excellent anti-bacterium capability, it is characterized in that containing simultaneously the Ag of 0.0005～0.20 weight % and the Cu of 2.5～4.5 weight %, wherein Ag exists with fine silver particles or oxide compound, sulphided form, and Cu part or most of form with rich Cu precipitated phase exist.
The present invention has in the austenitic stainless steel of excellent anti-bacterium capability, best C≤0.1 weight %, Si≤2 weight %, Mn≤3 weight %, Cr 10～30 weight %, Ni 5～12 weight %.
The present invention has the austenitic stainless steel of excellent anti-bacterium capability, it is characterized in that further containing Ti and/or the Nb of 0.1～1 weight %.
The present invention has the austenitic stainless steel of excellent anti-bacterium capability, can further contain at least a following alloying element: be no more than the Mo of 2 weight %, be no more than the Zr of 1 weight %, be no more than the B of 0.1 weight %.
The present invention has the austenitic stainless steel of excellent anti-bacterium capability, can also further contain the V of 0.001～1.0 weight %.
The present invention has in the austenitic stainless steel of excellent anti-bacterium capability, and the content of its P and S preferably is controlled at below the 0.015 weight %.
The present invention has the austenitic stainless steel of excellent anti-bacterium capability, can be sheet material, tubing, band or foundry goods.
The present invention also provides above-mentioned preparation method with austenitic stainless steel of excellent anti-bacterium capability, it is characterized in that, carry out sufficient solution treatment at 950～1100 ℃, carry out sufficient ageing treatment at 500～900 ℃ then, make the precipitated phase that forms Cu in the matrix, its yardstick is between between nanometer and submicron.
The present invention distributes mutually by certain Ag being arranged or contain Ag in adding more a spot of Ag and adopting conventional smelting technology realization stainless steel, add more a spot of Cu simultaneously and make it in steel form and separate out with antibiotic phase by antibiotic thermal treatment, cost that then can be lower obtains not only have good anti-microbial property, but also guarantee the austenite antimicrobial stainless steel that solidity to corrosion requires, the etch resistant properties of austenitic stainless steel obviously is better than ferritic stainless steel, and the scope of application of its goods is wider.
The present invention is by adding the antibiotic thermal treatment that has the metal element A g and the Cu of antibacterial and carry out being made up of solid solution and timeliness in stainless steel, in stainless steel, form fine contain Ag with contain Cu antibioticly (be respectively the oxide compound of Ag and Ag or sulfide and rich Cu ε-Cu), make material have good antibacterial mutually mutually.Because antibiotic is to distribute at stainless steel surface and inner even dispersion mutually, the antibacterial of material can not lost because of wearing and tearing.Therefore anti-bacteria stainless steel of the present invention can be used as structured material and decoration material and is used for making and needs antimicrobial daily living article such as restaurant vessel, bathroom utensil and communal facility and need all kinds of production machinerys of antimicrobial such as pharmacy, food-processing apparatus etc.
Description of drawings:
Fig. 1 is the cultivation results photo after bacterium liquid and the austenite antimicrobial stainless steel effect:
A left side among the figure: the present invention's anti-bacteria stainless steel, do not see bacterial reproduction; Right: the contrast steel, bacterium breeds in a large number.
Embodiment:
Specimen preparation: according to the composition of austenite antimicrobial stainless steel of the present invention, smelt with the 25kg vacuum induction furnace, and after forge, hot rolling and annealing, cold rolling repeatedly-annealing-pickling, make the sheet material of 0.8mm, sheet material in vacuum oven in 1050 ℃ keep 7 minutes after, 700 ℃ 6 hours the timeliness of carrying out.Cut the sample of 40 * 40mm from above-mentioned sheet material, carry out the anti-microbial property check then.Cast samples cuts the thick test piece of 8mm after tying up to the 25kg vacuum induction melting on perpendicular to the ingot casting direction of principal axis, adopt above-mentioned thermal treatment process, then is processed into the antibiotic test sample of 40 * 40 * 5mm.
The anti-microbial property check: the antibiotic detection method of Japanese antibiotic association " Japanese Industrial Standards: the germ resistance test method and the antibacterial effect of antibiotic fabricated product " (JISZ2801-2000 of Japanese Industrial Standards) is adopted in antibiotic check, adopts method with plastic film, bacterial concentration 10
5Cfu/ml, the microbial culture temperature and humidity is respectively 35 ℃, 90%, bacterium under antibiotic steel and the effect of contrast steel is made 24h respectively to be cultivated, then the bacterium through above-mentioned cultivation is made 24h respectively with the agar cultivation under identical temperature and humidity and cultivate, calculate bacterial count from the plastics plate with Plating.Experiment is the reference culture that Chinese biological goods drug inspection office provides with bacterial classification, is respectively intestinal bacteria ATCC8099, streptococcus aureus ATCC6538, Candida albicans ATCC10231.Each bacterial classification and sample all repeat 3 times, take the mean.
The evaluation of antibacterial effect:
The calculation formula of sterilizing rate is:
Above-mentioned contrast stainless steel aerobic plate count is that the bacterium liquid after the contrast stainless steel surface effect carries out the viable count that microbial culture experiment back records in plate, and the anti-bacteria stainless steel aerobic plate count is meant that bacterium liquid after the anti-bacteria stainless steel effect carries out the viable count that records after the microbial culture experiment.Antibacterial effect is divided into four classes: ++ expression sterilizing rate 〉=99% ,+expression sterilizing rate 〉=90%, 0 expression sterilizing rate is between 60-90%, and * expression＜60 does not promptly have obvious germicidal action.
Contain the anti-bacteria stainless steel of two kinds of antiseptic elements and the composition and the anti-microbial property evaluation result of contrast steel and be shown in table 1.Wherein, numbering 1-9 is antibiotic steel, and 9 and 10 are the contrast steel.
Table 1: the chemical ingredients and the antibacterial effect of anti-bacteria stainless steel and contrast steel
| Numbering | Alloying constituent, weight % | Antibacterial effect | ||||||||||
| C | Si | Mn | Cr | Ni | Cu | Ag | Mo | Zr | Ti/Nb | Other | ||
| 1 | 0.08 | 0.55 | 1.06 | 18.5 | 9.1 | 3.83 | 0.0007 | - | - | -/0.2 | ++ | |
| 2 | 0.03 | 0.60 | 0.88 | 17.8 | 8.9 | 3.53 | 0.0005 | - | 0.1 | 0.2/0 | + | |
| 3 | 0.05 | 0.46 | 1.58 | 16.9 | 9.1 | 3.74 | 0.0010 | 0.2 | 0.1 | -/- | V0.1 | ++ |
| 4 | 0.07 | 0.51 | 0.49 | 17.1 | 8.13 | 1.05 | 0.0009 | 0.2 | - | 0.1/0.1 | ++ | |
| 5 | 0.08 | 0.54 | 0.67 | 18.7 | 8.2 | 3.70 | 0.0008 | 0.1 | - | 0.2 | B0.01 | ++ |
| 6 | 0.06 | 0.63 | 1.44 | 16.8 | 8.6 | 3.99 | 0.0015 | 0.1 | 0.1 | 0.2/0.1 | ++ | |
| 7 | 0.07 | 0.61 | 0.66 | 17.2 | 7.9 | 3.69 | 0.0011 | 0.3 | - | 0.1/0 | V0.1 | ++ |
| 8 | 0.08 | 0.37 | 1.29 | 17.0 | 8.1 | 3.60 | 0.0016 | - | 0.1 | -/0.1 | B0.01 | ++ |
| 9 | 0.07 | 0.55 | 0.58 | 16.9 | 8.2 | 4.00 | 0.0005 | - | - | - | ++ | |
| 10 | 0.06 | 0.49 | 1.16 | 16.0 | 8.19 | 3.89 | 0.0010 | - | - | - | ++ | |
| 11 | 0.06 | 0.63 | 1.44 | 16.8 | 8.6 | 2.99 | 0.0006 | + | ||||
| 12 | 0.05 | 0.55 | 1.06 | 17.8 | 8.0 | 2.88 | 0.0003 | △ | ||||
| 13 | 0.07 | 0.91 | 0.55 | 18.1 | 7.5 | 3.29. | 0.0004 | △ | ||||
| 13 | 0.06 | 0.61 | 1.66 | 17.1 | 7.19 | - | 0.0003 | - | 0.1 | 0.2 | × | |
| 14 | 0.07 | 0.65 | 0.50 | 17.0 | 8.20 | - | 0.0004 | 0.1 | - | 0.2 | B0.01 | × |
| 15 | 0.08 | 0.56 | 0.49 | 16.2 | 7.56 | 3.19 | - | - | - | - | × | |
Claims (8)
1, a kind of austenitic stainless steel with excellent anti-bacterium capability, it is characterized in that containing simultaneously the Ag of 0.0005～0.20 weight % and the Cu of 2.5～4.5 weight %, wherein Ag exists with fine silver particles or oxide compound, sulphided form, and Cu part or most of form with rich Cu precipitated phase exist.
2,, it is characterized in that C≤0.1 weight % wherein, Si≤2 weight %, Mn≤3 weight %, Cr 10～30 weight %, Ni 5～12 weight % according to the described austenitic stainless steel of claim 1 with excellent anti-bacterium capability.
3,, it is characterized in that further containing Ti and/or the Nb of 0.1～1 weight % according to the described austenitic stainless steel of claim 2 with excellent anti-bacterium capability.
4, according to the described austenitic stainless steel of claim 3, it is characterized in that further containing at least a following alloying element: be no more than the Mo of 2 weight %, be no more than the Zr of 1 weight %, be no more than the B of 0.1 weight % with excellent anti-bacterium capability.
5,, it is characterized in that also containing the V of 0.001～1.0 weight % according to the described austenitic stainless steel of claim 4 with excellent anti-bacterium capability.
6,, it is characterized in that the content of its P and S all is controlled at below the 0.015 weight % according to the described austenitic stainless steel of claim 5 with excellent anti-bacterium capability.
7,, it is characterized in that described austenitic stainless steel is sheet material, tubing, band or foundry goods according to the described austenitic stainless steel of one of claim 1～6 with excellent anti-bacterium capability.
8, the described preparation method of one of a kind of claim 1～7 with austenitic stainless steel of excellent anti-bacterium capability, it is characterized in that, carry out sufficient solution treatment at 950～1100 ℃, carry out sufficient ageing treatment at 500～900 ℃ then, make the precipitated phase that forms Cu in the matrix, its yardstick is between between nanometer and submicron.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102234741A (en) * | 2010-04-22 | 2011-11-09 | 宝山钢铁股份有限公司 | Low-Ni-containing austenitic antimicrobial stainless steel and manufacturing method thereof |
| CN102676943A (en) * | 2012-06-15 | 2012-09-19 | 福州大学 | Copper bearing antimicrobial duplex stainless steel and preparation method thereof |
| CN103045951A (en) * | 2012-12-30 | 2013-04-17 | 广州番禺职业技术学院 | High-nitrogen nickel-free austenite antibacterial stainless steel (HNSAg) and manufacturing method thereof |
| CN105039871A (en) * | 2015-09-02 | 2015-11-11 | 山西太钢不锈钢股份有限公司 | Method for improving deep drawability of copper-bearing austenite anti-microbial stainless steel cold-rolled plate |
| CN109114310A (en) * | 2018-09-20 | 2019-01-01 | 西安华杰管道有限公司 | Double card presses anti-bacteria stainless steel pipeline and preparation method thereof |
| CN109161655A (en) * | 2018-09-20 | 2019-01-08 | 西安华杰管道有限公司 | Single deck tape-recorder presses anti-bacteria stainless steel pipeline and preparation method thereof |
| CN109161654A (en) * | 2018-09-20 | 2019-01-08 | 西安华杰管道有限公司 | Ring pressure type anti-bacteria stainless steel pipeline and preparation method thereof |
| CN109185575A (en) * | 2018-09-20 | 2019-01-11 | 西安华杰管道有限公司 | Block viscous formula anti-bacteria stainless steel pipeline and preparation method thereof |
| CN115595509A (en) * | 2022-12-13 | 2023-01-13 | 太原科技大学（Cn） | High-strength-plasticity copper-containing austenitic stainless steel and production process thereof |
-
2006
- 2006-04-14 CN CN 200610046310 patent/CN101054651A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102234741A (en) * | 2010-04-22 | 2011-11-09 | 宝山钢铁股份有限公司 | Low-Ni-containing austenitic antimicrobial stainless steel and manufacturing method thereof |
| CN102676943A (en) * | 2012-06-15 | 2012-09-19 | 福州大学 | Copper bearing antimicrobial duplex stainless steel and preparation method thereof |
| CN103045951A (en) * | 2012-12-30 | 2013-04-17 | 广州番禺职业技术学院 | High-nitrogen nickel-free austenite antibacterial stainless steel (HNSAg) and manufacturing method thereof |
| CN105039871A (en) * | 2015-09-02 | 2015-11-11 | 山西太钢不锈钢股份有限公司 | Method for improving deep drawability of copper-bearing austenite anti-microbial stainless steel cold-rolled plate |
| CN105039871B (en) * | 2015-09-02 | 2017-03-22 | 山西太钢不锈钢股份有限公司 | Method for improving deep drawability of copper-bearing austenite anti-microbial stainless steel cold-rolled plate |
| CN109114310A (en) * | 2018-09-20 | 2019-01-01 | 西安华杰管道有限公司 | Double card presses anti-bacteria stainless steel pipeline and preparation method thereof |
| CN109161655A (en) * | 2018-09-20 | 2019-01-08 | 西安华杰管道有限公司 | Single deck tape-recorder presses anti-bacteria stainless steel pipeline and preparation method thereof |
| CN109161654A (en) * | 2018-09-20 | 2019-01-08 | 西安华杰管道有限公司 | Ring pressure type anti-bacteria stainless steel pipeline and preparation method thereof |
| CN109185575A (en) * | 2018-09-20 | 2019-01-11 | 西安华杰管道有限公司 | Block viscous formula anti-bacteria stainless steel pipeline and preparation method thereof |
| CN115595509A (en) * | 2022-12-13 | 2023-01-13 | 太原科技大学（Cn） | High-strength-plasticity copper-containing austenitic stainless steel and production process thereof |
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