CN1948540A - Ferrite stainless steel having excellent antibacterial characteristics - Google Patents
Ferrite stainless steel having excellent antibacterial characteristics Download PDFInfo
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- CN1948540A CN1948540A CN 200510047396 CN200510047396A CN1948540A CN 1948540 A CN1948540 A CN 1948540A CN 200510047396 CN200510047396 CN 200510047396 CN 200510047396 A CN200510047396 A CN 200510047396A CN 1948540 A CN1948540 A CN 1948540A
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Abstract
A kind of ferrite stainless steel with good antisepsis is disclosed. It contains C<0.1%, Si<1%,Mn<1.0%,Cr 10-30% ,Nb 0.01-0.5%,and allowance is Fe. It is characterized in that it contains 0.0005-0.10% Ag and 0.3-2.0% Cu simultaneously. Ag exists in form of tenuous, oxide and sulfide, 30-80% of Cu exists in form of precipitated phase. Simultaneous application of two antisepsis element not only strengthens antisepsis property of single antiseptic non-corrosive steel with Cu, but also solves difficulties in cost of antiseptic non-corrosive steel with Ag. The non-corrosive steel can be applied in the fields of accommodation, medication and public health.
Description
Technical field:
The present invention relates to ferritic 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, therefore 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 wear-resisting wiping, resistant to elevated temperatures metal antibacterial material.Common stainless steel is because of its human safety, good intensity, heatproof and corrosion stability widespread use in daily society, that anti-bacteria stainless steel has concurrently is antibiotic, decoration and as multiple characteristics such as the high strength of structured material, corrosion-resistant, high temperature resistant, rub resistances, is the ideal anti-biotic material.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; Cu can realize that the antibiotic disperse in stainless steel of Cu distributes by the method that the supersaturated solid solution precipitation is separated out, and 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.Distribute 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 the form with antibiotic phase by antibiotic thermal treatment and separate out, cost that then can be lower obtains not only have good anti-microbial property, but also guarantee the anti-bacteria stainless steel that solidity to corrosion requires.
Summary of the invention:
The objective of the invention is by two kinds of antiseptic elements existence in stainless steel, further improve the over-all properties of the anti-microbial property and the optimization material of material, solve and add the shortcoming that single antiseptic elements exists in technology, cost and performance invention.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 and all kinds of production machinerys of requirements of one's work antimicrobial under general condition.
The present invention specifically provides a kind of ferritic stainless steel with excellent anti-bacterium capability, contain＜C of 0.1 weight %, the Si of＜1 weight %, the Mn of＜1.0 weight %, the Cr of 10～30 weight %, the Nb of 0.01～0.5 weight %, the Fe of surplus, it is characterized in that also containing simultaneously the Ag of 0.0005～0.10 weight % and the Cu of 0.3～2.0 weight %, wherein Ag exists with fine silver particles or oxide compound, sulphided form, and 30～80% Cu exists with the form of precipitated phase.
The present invention has in the ferritic stainless steel of excellent anti-bacterium capability, preferably, and Ag0.0005～0.002 weight %, Cu1.0～2.0 weight %.
The present invention has in the ferritic stainless steel of excellent anti-bacterium capability, can also 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 in the ferritic 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 ferritic stainless steel of excellent anti-bacterium capability, and the content of its P and S all should be controlled at below the 0.015 weight %.
The form that the present invention has the ferritic stainless steel of excellent anti-bacterium capability can be sheet material, tubing or band.
The present invention also provides above-mentioned preparation method with ferritic stainless steel of excellent anti-bacterium capability, it is characterized in that: 880～950 ℃ of solution treatment of carrying out the enough time, 5 minutes～72 hours time, carry out sufficient ageing treatment at 500～900 ℃ then, 1～100 hour time, make the precipitated phase that forms Cu in the matrix, its yardstick is between between nanometer and submicron.
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 all to have disperse to distribute at stainless steel surface and inside mutually, the antibacterial of material can not lost because of wearing and tearing.
Description of drawings:
Fig. 1 is the microscopic appearance of the rich Cu precipitated phase in the steel of the present invention;
Fig. 2 is a bacteria cultivation results: a left side: 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 ferrite antibacterial 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, cut the sample of 25 * 25mm from above-mentioned sheet material, in vacuum oven in 920 ℃ keep 7 minutes after, 600 ℃ 6 hours the timeliness of carrying out.Carry out the anti-microbial property check then.
The anti-microbial property check: concrete check is carried out in the disease prevention and control center, adopt the antibiotic detection method of Japanese antibiotic association " Japanese Industrial Standards: the germ resistance test method and the antibacterial effect of antibiotic fabricated product " (the JIS Z2801-2000 of Japanese Industrial Standards), adopt method with plastic film, with concentration 10
5The standard bacterium liquid of cfu/ml is under the condition of 35 ℃ of temperature, humidity 90%, respectively the bacterium under antibiotic steel and the effect of contrast steel is made the 24h microbial culture, thereafter make the 24h microbial culture to cultivating with agar under identical temperature and humidity through the bacterium of above-mentioned sample cultivation respectively, calculate bacterial count from the plastics plate.Experiment is provided by Chinese biological goods drug inspection office 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:
Sterilizing rate (%)=[(b-a)/and b] %
Wherein b is the viable count after the contrast stainless steel carries out the microbial culture experiment, and a is the viable count after anti-bacteria stainless steel carries out the microbial culture experiment.
Antibacterial effect is divided three classes: ++ expression sterilizing rate 〉=99% ,+expression sterilizing rate 〉=90%, * expression does not have 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 1-10 is antibiotic steel, and the composition of 11 and No. 12 steel is not within the described composition range of this application, and 13 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 | Other | ||
| 1 | 0.08 | 0.55 | 0.55 | 16.5 | 0.11 | 1.83 | 0.0007 | - | - | - | ++ | |
| 2 | 0.07 | 0.60 | 0.51 | 16.8 | 0.14 | 1.03 | 0.0005 | - | 0.1 | 0.2 | + | |
| 3 | 0.05 | 0.46 | 0.58 | 16.9 | 0.15 | 1.84 | 0.0010 | 0.2 | 0.1 | - | V0.1 | ++ |
| 4 | 0.07 | 0.51 | 0.49 | 17.1 | 0.13 | 1.05 | 0.0009 | 0.2 | - | 0.1 | ++ | |
| 5 | 0.08 | 0.54 | 0.67 | 16.7 | 0.17 | 1.70 | 0.0008 | 0.1 | - | 0.2 | B0.01 | ++ |
| 6 | .006 | 0.53 | 0.64 | 16.8 | 0.10 | 1.71 | 0.0015 | 0.1 | 0.1 | 0.2 | ++ | |
| 7 | .007 | 0.61 | 0.66 | 17.2 | 0.11 | 1.69 | 0.0011 | 0.3 | - | 0.1 | V0.1 | ++ |
| 8 | 0.08 | 0.57 | 0.49 | 17.0 | 0.15 | 1.70 | 0.0016 | - | 0.1 | - | B0.01 | ++ |
| 9 | 0.07 | 0.55 | 0.58 | 16.0 | 0.22 | 2.00 | 0.0005 | - | - | - | ++ | |
| 10 | 0.06 | 0.49 | 0.66 | 15.0 | 0.19 | 0.30 | 0.01. | - | - | - | ++ | |
| 11 | 0.06 | 0.61 | 0.66 | 17.1 | 0.19 | - | 0.0002 | - | 0.1 | 0.2 | × | |
| 12 | 0.07 | 0.65 | 0.50 | 17.0 | 0.20 | - | - | 0.1 | - | 0.2 | B0.01 | × |
| 13 | 0.08 | 0.56 | 0.49 | 16.2 | 0.26 | 0.29 | 0.0004 | - | - | - | × | |
Claims (7)
1, a kind of ferritic stainless steel with excellent anti-bacterium capability, contain＜C of 0.1 weight %, the Si of＜1 weight %, the Mn of＜1.0 weight %, the Cr of 10～30 weight %, the Nb of 0.01～0.5 weight %, the Fe of surplus, it is characterized in that also containing simultaneously the Ag of 0.0005～0.10 weight % and the Cu of 0.3～2.0 weight %, wherein Ag exists with fine silver particles or oxide compound, sulphided form, and 30～80% Cu exists with the form of precipitated phase.
2,, it is characterized in that wherein Ag0.0005～0.002 weight %, Cu1.0～2.0 weight % according to the described ferritic stainless steel of claim 1 with excellent anti-bacterium capability.
3, according to claim 1 or 2 described ferritic stainless steels, it is characterized in that also 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.
4,, it is characterized in that also further containing the V of 0.001～1.0 weight % according to the described ferritic stainless steel of claim 3 with excellent anti-bacterium capability.
5,, 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 ferritic stainless steel of claim 4 with excellent anti-bacterium capability.
6,, it is characterized in that stainless form is sheet material, tubing or band according to the described ferritic stainless steel of claim 5 with excellent anti-bacterium capability.
7, the described preparation method of a kind of claim 1 with ferritic stainless steel of excellent anti-bacterium capability, it is characterized in that: carried out solution treatment 5 minutes～72 hours at 880～950 ℃, carried out ageing treatment 1～100 hour 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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| CNB2005100473966A CN100447282C (en) | 2005-10-14 | 2005-10-14 | Ferrite stainless steel having excellent antibacterial characteristics |
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| CNB2005100473966A CN100447282C (en) | 2005-10-14 | 2005-10-14 | Ferrite stainless steel having excellent antibacterial characteristics |
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| CN100447282C CN100447282C (en) | 2008-12-31 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100547102C (en) * | 2007-04-20 | 2009-10-07 | 宝山钢铁股份有限公司 | A kind of biphase antibiotic stainless steel and manufacture method thereof |
| CN102345068A (en) * | 2011-06-27 | 2012-02-08 | 苏州方暨圆节能科技有限公司 | Antibacterial and corrosion resistant thermal fin for stainless steel radiator |
| CN102345067A (en) * | 2011-06-27 | 2012-02-08 | 苏州方暨圆节能科技有限公司 | Antibacterial and corrosion resistant stainless steel heat exchanger cooling flat pipe |
| CN102363861A (en) * | 2011-06-27 | 2012-02-29 | 苏州方暨圆节能科技有限公司 | Antibacterial and corrosion-resistant stainless steel radiator heat pipe |
| CN107267882A (en) * | 2017-07-24 | 2017-10-20 | 宁波诺宏金属材料技术咨询有限公司 | A kind of stainless steel of high stretching and preparation method thereof |
| CN107541661A (en) * | 2017-09-29 | 2018-01-05 | 江苏理工学院 | A kind of antibacterial ferritic stainless steel alloy material and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100328036B1 (en) * | 1997-10-20 | 2002-04-17 | 이구택 | Ferritic Stainless Steels Having Anti-bacterial Property and A Method of Manufacturing Thereof |
| JP3962149B2 (en) * | 1998-03-13 | 2007-08-22 | 日新製鋼株式会社 | Ferritic stainless steel with excellent antibacterial properties |
| CN1230570C (en) * | 2002-11-07 | 2005-12-07 | 中国科学院金属研究所 | Antibacterial stainless steel of ferrite in nano precipitated phase |
| CN100410412C (en) * | 2005-03-24 | 2008-08-13 | 刘文西 | Antibacterial austenitic stainless steel |
-
2005
- 2005-10-14 CN CNB2005100473966A patent/CN100447282C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100547102C (en) * | 2007-04-20 | 2009-10-07 | 宝山钢铁股份有限公司 | A kind of biphase antibiotic stainless steel and manufacture method thereof |
| CN102345068A (en) * | 2011-06-27 | 2012-02-08 | 苏州方暨圆节能科技有限公司 | Antibacterial and corrosion resistant thermal fin for stainless steel radiator |
| CN102345067A (en) * | 2011-06-27 | 2012-02-08 | 苏州方暨圆节能科技有限公司 | Antibacterial and corrosion resistant stainless steel heat exchanger cooling flat pipe |
| CN102363861A (en) * | 2011-06-27 | 2012-02-29 | 苏州方暨圆节能科技有限公司 | Antibacterial and corrosion-resistant stainless steel radiator heat pipe |
| CN107267882A (en) * | 2017-07-24 | 2017-10-20 | 宁波诺宏金属材料技术咨询有限公司 | A kind of stainless steel of high stretching and preparation method thereof |
| CN107541661A (en) * | 2017-09-29 | 2018-01-05 | 江苏理工学院 | A kind of antibacterial ferritic stainless steel alloy material and preparation method thereof |
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| CN100447282C (en) | 2008-12-31 |
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