CN102965477A - Copper-containing austenite antibacterial stainless steel product and preparation method thereof - Google Patents
Copper-containing austenite antibacterial stainless steel product and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a copper-containing austenite antibacterial stainless steel product and a preparation method thereof. An antibacterial heat treatment process comprises the following steps of: insulating for 10-60 minutes at the temperature of 1100-1150 DEG C, and carrying out water-cooling to room temperature, so that the copper element is in a supersaturation solid solution state and is dissolved into a stainless steel base; and then insulating for 2-5 hours at the temperature of 600-850 DEG C, and carrying out air-cooling to room temperature, so that the copper element is uniformly dispersed and precipitated in an antibacterial particle epsilon-Cu phase, wherein dimension of the precipitated phase is controlled at 100-200nm. Mechanical properties, cold processing performance, polishing performance and corrosion resisting property of a stainless steel material are not influenced while antibacterial function is met, and the copper-containing austenite antibacterial stainless steel product provided by the invention has the advantages of lasting antibacterial property and wear resistance. The copper-containing austenite antibacterial stainless steel product provided by the invention can be widely applied to stainless steel products requiring lasting antibacterial property in the fields of medical treatment, health, food processing, catering, public facility and the like.
Description
Technical field
The present invention relates to a kind of cupric austenite antimicrobial stainless steel goods and preparation method thereof.
Background technology
Stainless steel has good performance, is widely used in the every field of daily life, such as Operation trolley of tableware, towel hanger, hand washing sink, elevator, handrail, door handle, dining room go-cart, food platform, counter, hospital etc.Common stainless steel does not have antibacterial, and unwanted bacteria is easily multiplied at Stainless Steel Products, is used for the Stainless Steel Products of human daily contact, causes easily the contact transmission of bacterium, brings hidden danger to HUMAN HEALTH.
Nationwide pathogenic intestinal bacteria " O-157 " infection event had occured in Japan in 1996, " mad cow disease " of Britain's outburst in 1997, " foot and mouth disease " broken out in the states such as Japan in 2000, Mongolia, SARS had been broken out in China in 2003, and a series of startling bacterial infection sexual behavior parts have caused the research boom of various countries to antibiotic stainless material.1996, Japan took the lead in carrying out the research of anti-bacteria stainless steel, and had successively developed copper-bearing antibacterial stainless steel and two series of silver-containing antibacterial stainless steel.After this, each large scientific research institutions of China have also successively carried out relevant research such as Shenyang metal institute of the Chinese Academy of Sciences, Baoshan Iron ﹠ Steel Co., Ltd, Taiyuan Steel stock Co., Ltd etc.In China, the patent of existing a large amount of relevant anti-bacteria stainless steels is obtained the authorization.
The cupric stainless steel 0Cr18Ni9Cu3(Japan trade mark is SUSXM7) be a kind of general stainless material.This material is at SUS304(0Cr18Ni9) the composition basis of steel adds 3 ~ 4 wt.% copper, improved the cold-workability of material, is mainly used in the higher cold pier parts of degree of deformation such as interior hexagonal, coach screw, self threading pin.The copper content of this material is very approaching with the composition of the cupric austenite antimicrobial stainless steel of studying now, and its composition sees Table 1:
Table 1 SUSXM7 stainless steel and SUS304 stainless steel chemical component (wt%)
The present situation of at present anti-bacteria stainless steel goods existence is; because technical monopoly; although the research of anti-bacteria stainless steel material is very burning hot; but the Stainless Steel Products with its preparation is very rare on market; it disconnects with the application that is used for various anti-bacteria stainless steel goods, and Application and Development is extremely urgent in the technology of various anti-bacteria stainless steel goods.
Summary of the invention
The objective of the invention is for above-mentioned existing problems, provide a kind of when satisfying antibacterial, the mechanical property of assurance stainless material, cold-forming property, polishing performance, corrosion resisting property etc. are unaffected, and it is antibiotic lasting to have, and is not afraid of cupric austenite antimicrobial stainless steel goods of wearing and tearing and preparation method thereof.
The object of the invention is to the stainless antibacterial of a kind of general cupric is developed, for it provides a new purposes in the application aspect the antimicrobial prod.
The object of the present invention is achieved like this: the preparation method of cupric austenite antimicrobial stainless steel goods, its preparation method comprises the antibacterial heat-treatment technique of 0Cr18Ni9Cu3 cupric stainless steel unshaped goods, step comprises: 0Cr18Ni9Cu3 cupric stainless steel unshaped goods are incubated 10 ~ 60min under 1100 ~ 1150 ℃ temperature, water-cooled makes copper be the super saturated solid solution attitude and dissolves in the austenite stainless steel matrix to room temperature; Then, be incubated 2 ~ 5 hours under 600 ~ 850 ℃ temperature, air cooling makes copper separate out with antimicrobial particle ε-Cu phase even dispersion to room temperature, and the size control of precipitated phase is at 100 ~ 200nm.Make it when satisfying antibacterial, the mechanical property of assurance stainless material, cold-forming property, polishing performance, corrosion resisting property etc. are unaffected.
Cupric austenite antimicrobial stainless steel goods of the present invention, its 0Cr18Ni9Cu3 cupric stainless steel unshaped goods are by after the antibacterial heat-treatment technique, carry out blanking, punching press, side cut forming technology again and make.
The present invention, the preparation method of cupric austenite antimicrobial stainless steel goods, its preparation method comprises the antibacterial heat-treatment technique of 0Cr18Ni9Cu3 cupric stainless steel molded article, step comprises: 0Cr18Ni9Cu3 cupric stainless steel molded article is the last time after the annealing treating process, under 1100 ~ 1150 ℃ temperature, be incubated 10 ~ 60min, water-cooled makes copper be the super saturated solid solution attitude and dissolves in the austenite stainless steel matrix to room temperature; Then, be incubated 2 ~ 5 hours under 600 ~ 850 ℃ temperature, air cooling makes copper separate out with antimicrobial particle ε-Cu phase even dispersion to room temperature, and the size control of precipitated phase is at 100 ~ 200nm.
Cupric austenite antimicrobial stainless steel goods of the present invention, it adopts 0Cr18Ni9Cu3 cupric stainless steel materials to be prepared into the stainless steel molded article through blanking, punching press, side cut forming technology, carries out antibacterial heat-treatment technique again and makes.
The invention has the beneficial effects as follows:
1), 0Cr18Ni9Cu3 cupric stainless steel has been carried out antibacterial heat-treatment research, can make material internal separate out a large amount of antimicrobial particle ε-Cu phase; Solid solution temperature and soaking time by the control antibacterial heat-treatment, aging temperature and soaking time, the antimicrobial particle ε that assurance is separated out-Cu phase even dispersion distributes, control simultaneously the size of precipitated phase, make it when satisfying antibacterial, the mechanical property of assurance stainless material, cold-forming property, polishing performance, corrosion resisting property etc. are unaffected;
2), adopt antibacterial heat-treatment to make 0Cr18Ni9Cu3 cupric stainless steel possess antibacterial, make it can be used for the antibiotic goods of various needs, enlarged its range of application.Anti-bacteria stainless steel goods with its preparation have good antimicrobial property to common bacterias such as intestinal bacteria, streptococcus aureuses, and have antibiotic lastingly, are not afraid of the characteristics such as wearing and tearing.
The present invention when having the antibacterial of satisfying, guarantees that the mechanical property, cold-forming property, polishing performance, corrosion resisting property etc. of stainless material are unaffected, and have antibiotic lasting, be not afraid of wearing and tearing advantage.Needing can be widely used in the Stainless Steel Products in the field such as medical treatment, health, food-processing, food and drink, communal facility of durable antibiotic performance.
The present invention is further illustrated by reference to the accompanying drawings for following embodiment.
Description of drawings
Fig. 1 is the stereoscan photograph figure after the antibacterial heat-treatment technique of one embodiment of the present of invention;
Fig. 2 is the variation diagram of the ε-Cu phase of Fig. 1 embodiment;
Fig. 3 is the spectrogram of the A section of Fig. 2.
Embodiment
To the thick 0Cr18Ni9Cu3 cupric stainless steel of 0.5mm, study its antibacterial heat-treatment technique, germ resistance, mechanical property.
The stainless antibacterial heat-treatment technique of 0Cr18Ni9Cu3 cupric: at 1100 ℃ of insulation 10min, water-cooled is to room temperature, making copper be the super saturated solid solution attitude dissolves in the austenite stainless steel matrix, then under 600 ~ 850 ℃ temperature, be incubated 2 ~ 5 hours, air cooling is to room temperature, copper is separated out with a large amount of antimicrobial particle ε-Cu phase even dispersion in stainless material inside, and the size control of precipitated phase is at 100 ~ 200nm.Its stereoscan photograph is with reference to Fig. 1, and the composition of its ε-Cu phase is with reference to Fig. 2, and the spectrogram of its A section is with reference to Fig. 3, and the spectrogram index sees Table 2:
Table 2
Antibacterial experiment:
Select two kinds of common bacterias of intestinal bacteria and streptococcus aureus to carry out Research on antibacterial.
Method with plastic film is adopted in the anti-microbial property test.Experimental arrangement is as follows:
(1) sterilization: clean experimental sample and control sample rear at 121 ℃ of lower autoclaving 20 min with dehydrated alcohol;
(2) application of sample: used microbionation in the plain agar substratum, was cultivated 24 hours in 37 ℃ shaking culture case, be diluted to the standard bacterium liquid that concentration is 105cfu/ml with stroke-physiological saline solution.Respectively 0.2ml bacterium liquid evenly is added drop-wise to the laboratory sample surface, and at its surface coverage aseptic plastic film, bacterium liquid is fully contacted with sample surfaces.Then the incubator of putting into 37 ℃ of temperature is done the microbial culture of 24 h;
(3) sampling: the sample that will cultivate 24 h takes out from incubator, places stroke-physiological saline solution, repeatedly washes its surface with dropper, gets l ml behind the mixing and is added in the sterile petri dish, then adds the 15ml nutrient agar and shakes up;
(4) cultivate: the culture dish after will taking a sample is placed on cultivates 24 h in 37 ℃ of incubators, calculate the bacterium number in each culture dish, calculates sterilizing rate.Every kind of antibacterial experiment all repeats 3 times, takes the mean.
The calculation formula of sterilizing rate:
Sterilizing rate (%)=(control sample viable count-antibiotic sample viable count)/control sample viable count * 100%
Antibacterial experiment the results are shown in Table 3:
Table 3 SUSXM7 contains the stainless sterilizing rate of Cu
SUSXM7 contains the Cu anti-bacteria stainless steel intestinal bacteria and streptococcus aureus is all shown very strong germicidal action, and sterilizing rate is all more than 99%.
The mechanical property experiment:
Mechanical property before and after the SUSXM7 cupric austenite stainless steel plate antibacterial heat-treatment of thickness 0.5mm is tested, and with the SUS304 of the identical thickness of slab control material as performance study.Mechanics Performance Testing is carried out according to standard GB/T/T 5028-2008, GB/T 5027-2007, GB/T 4156-2007 respectively.
The stainless mechanical property of 0Cr18Ni9Cu3 cupric changes before and after the antibacterial heat-treatment technique, and experimental result sees Table 4:
The stainless mechanical property of table 4 SUSXM7 stainless steel and SUS304
The work hardening exponent n of SUSXM7 cupric austenitic stainless steel is lower than the SUS304 stainless steel, and plastic strain ratio r increases than the SUS304 stainless steel, and unit elongation δ is up to 52%, and the Erichsen number IE of bi-material is very approaching.SUSXM7 cupric austenitic stainless steel is the same with the SUS304 stainless steel, has good cold machine-shaping performance.
Behind the antibacterial heat-treatment, yield strength, the tensile strength of SUSXM7 cupric austenitic stainless steel increase, but work hardening exponent n, plastic strain ratio r, Erichsen number IE are all less than too large variation.Antibacterial heat-treatment does not have much affect to the cold-forming property of SUSXM7 cupric austenitic stainless steel, and SUSXM7 cupric austenitic stainless steel can carry out cold machine-shaping again before antibacterial heat-treatment or behind the antibacterial heat-treatment.
But because behind the antibacterial heat-treatment, the yield strength of SUSXM7 cupric austenitic stainless steel and tensile strength increase before than antibacterial heat-treatment, the plastic force that needs in the cold working process can increase.
According to complexity and the fabrication processing of Stainless Steel Products, the invention provides the processing method that several 0Cr18Ni9Cu3 of utilization cupric stainless steels prepare the anti-bacteria stainless steel goods:
(1) for the Stainless Steel Products of simple shape, antibacterial heat-treatment is carried out first in suggestion, then carries out stamping.That is, at first 0Cr18Ni9Cu3 cupric stainless steel is carried out antibacterial heat-treatment, and then carry out the forming technologies such as blanking, punching press, side cut, be prepared into Stainless Steel Products.According to the thickness of stainless steel materials, in above-mentioned antibacterial heat-treatment processing range, determine concrete antibacterial heat-treatment technique;
(2) for complex-shaped Stainless Steel Products, the suggestion carry out first stamping, after carry out antibacterial heat-treatment.That is, at first 0Cr18Ni9Cu3 cupric stainless steel plate is prepared into Stainless Steel Products through operations such as blanking, punching press, side cuts, and then goods are carried out antibacterial heat-treatment.According to shape, the thickness of Stainless Steel Products, in above-mentioned antibacterial heat-treatment processing range, determine concrete antibacterial heat-treatment technique;
(3) complicated especially for shape, degree of deformation is larger, need to repeatedly carry out stampingly, and need carry out the Stainless Steel Products that process annealing is processed, and suggestion is carried out first stamping, after carry out antibacterial heat-treatment.That is, annealing treating process carries out the complete antibacterial heat-treatment that carries out again afterwards the last time.Prevent in the process annealing treating processes that the antibiotic ε-Cu phase agglomeration of organizing affects antibacterial effect.
Claims (5)
1. the preparation method of cupric austenite antimicrobial stainless steel goods, it is characterized in that: its preparation method comprises the antibacterial heat-treatment technique of 0Cr18Ni9Cu3 cupric stainless steel unshaped goods, step comprises: 0Cr18Ni9Cu3 cupric stainless steel unshaped goods are incubated 10 ~ 60min under 1100 ~ 1150 ℃ temperature, water-cooled makes copper be the super saturated solid solution attitude and dissolves in the austenite stainless steel matrix to room temperature; Then, be incubated 2 ~ 5 hours under 600 ~ 850 ℃ temperature, air cooling makes copper separate out with antimicrobial particle ε-Cu phase even dispersion to room temperature, and the size control of precipitated phase is at 100 ~ 200nm.
2. the cupric austenite antimicrobial stainless steel goods of an antibacterial heat-treatment technique preparation of adopting claim 1, it is characterized in that: described 0Cr18Ni9Cu3 cupric stainless steel unshaped goods carry out blanking, punching press, side cut forming technology again and make cupric austenite antimicrobial stainless steel goods after antibacterial heat-treatment technique.
3. the preparation method of cupric austenite antimicrobial stainless steel goods, it is characterized in that: its preparation method comprises the antibacterial heat-treatment technique of 0Cr18Ni9Cu3 cupric stainless steel molded article, step comprises: 0Cr18Ni9Cu3 cupric stainless steel molded article is the last time after the annealing treating process, under 1100 ~ 1150 ℃ temperature, be incubated 10 ~ 60min, water-cooled makes copper be the super saturated solid solution attitude and dissolves in the austenite stainless steel matrix to room temperature; Then, be incubated 2 ~ 5 hours under 600 ~ 850 ℃ temperature, air cooling makes copper separate out with antimicrobial particle ε-Cu phase even dispersion to room temperature, and the size control of precipitated phase is at 100 ~ 200nm.
4. the cupric austenite antimicrobial stainless steel goods of an antibacterial heat-treatment technique preparation of adopting claim 3, it is characterized in that: it adopts 0Cr18Ni9Cu3 cupric stainless steel materials to be prepared into the stainless steel molded article through blanking, punching press, side cut forming technology, makes cupric austenite antimicrobial stainless steel goods through antibacterial heat-treatment technique again.
5. it is characterized in that according to claim 2 or 4 described cupric austenite antimicrobial stainless steel goods: 0Cr18Ni9Cu3 cupric stainless steel is used for various anti-bacteria stainless steel goods.
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Cited By (7)
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| CN104480407A (en) * | 2014-12-08 | 2015-04-01 | 上海大学 | Copper/cerium-containing antimicrobial stainless steel and preparation 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 |
| CN106498285A (en) * | 2016-11-30 | 2017-03-15 | 中国科学院金属研究所 | A kind of austenite antimicrobial stainless steel without the need for Ageing Treatment |
| CN107937691A (en) * | 2018-01-12 | 2018-04-20 | 沈阳融荣科技有限公司 | A kind of heat treatment method of economical copper-bearing antibacterial stainless steel hot rolling sheets |
| CN111519112A (en) * | 2020-06-10 | 2020-08-11 | 滨州阳信华美不锈钢制品股份有限公司 | Preparation method of antibacterial stainless steel material |
| CN114686747A (en) * | 2022-02-15 | 2022-07-01 | 陕西斯瑞新材料股份有限公司 | Method for preparing copper stainless steel in-situ composite material by adopting vacuum consumable arc melting |
| 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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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480407A (en) * | 2014-12-08 | 2015-04-01 | 上海大学 | Copper/cerium-containing antimicrobial stainless steel and preparation 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 |
| CN106498285A (en) * | 2016-11-30 | 2017-03-15 | 中国科学院金属研究所 | A kind of austenite antimicrobial stainless steel without the need for Ageing Treatment |
| CN106498285B (en) * | 2016-11-30 | 2019-02-12 | 中国科学院金属研究所 | A kind of austenite antimicrobial stainless steel without ageing treatment |
| CN107937691A (en) * | 2018-01-12 | 2018-04-20 | 沈阳融荣科技有限公司 | A kind of heat treatment method of economical copper-bearing antibacterial stainless steel hot rolling sheets |
| CN107937691B (en) * | 2018-01-12 | 2019-04-09 | 沈阳融荣科技有限公司 | A kind of heat treatment method of economical copper-bearing antibacterial stainless steel hot rolling sheets |
| CN111519112A (en) * | 2020-06-10 | 2020-08-11 | 滨州阳信华美不锈钢制品股份有限公司 | Preparation method of antibacterial stainless steel material |
| CN114686747A (en) * | 2022-02-15 | 2022-07-01 | 陕西斯瑞新材料股份有限公司 | Method for preparing copper stainless steel in-situ composite material by adopting vacuum consumable arc melting |
| 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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Application publication date: 20130313 |