CN102978535B - Novel martensite antibacterial stainless steel as well as heat treatment method and application thereof - Google Patents
Novel martensite antibacterial stainless steel as well as heat treatment method and application thereof Download PDFInfo
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 104
- 239000010935 stainless steel Substances 0.000 title claims abstract description 103
- 229910000734 martensite Inorganic materials 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000000844 anti-bacterial effect Effects 0.000 title abstract description 35
- 238000010438 heat treatment Methods 0.000 title abstract 3
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 9
- 230000000845 anti-microbial effect Effects 0.000 claims description 56
- 238000009413 insulation Methods 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 8
- 239000003814 drug Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 22
- 238000005260 corrosion Methods 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 14
- 229910052719 titanium Inorganic materials 0.000 abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 26
- 229910000831 Steel Inorganic materials 0.000 description 26
- 229910052802 copper Inorganic materials 0.000 description 26
- 239000010959 steel Substances 0.000 description 26
- 230000001954 sterilising effect Effects 0.000 description 13
- 238000007669 thermal treatment Methods 0.000 description 12
- 241000894006 Bacteria Species 0.000 description 9
- 241000191967 Staphylococcus aureus Species 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 9
- 239000011651 chromium Substances 0.000 description 8
- 239000006104 solid solution Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000000968 intestinal effect Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 5
- 239000013068 control sample Substances 0.000 description 5
- 150000001879 copper Chemical class 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 229910010272 inorganic material Inorganic materials 0.000 description 4
- 239000011147 inorganic material Substances 0.000 description 4
- 239000011733 molybdenum Substances 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 238000000840 electrochemical analysis Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 239000003242 anti bacterial agent Substances 0.000 description 2
- 229940088710 antibiotic agent Drugs 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 230000003115 biocidal effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009629 microbiological culture Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- -1 KCl saturated calomel Chemical class 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
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- 210000000987 immune system Anatomy 0.000 description 1
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
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Abstract
The invention belongs to the field of stainless steel material and in particular relates to a martensite antibacterial stainless steel as well as a heat treatment method and application thereof. The martensite antibacterial stainless steel comprises the following chemical components in percentage by weight: 0.20-0.25% of C, less than 1.0% of Si, less than 1.0% of Mn, less than 0.035% of P, less than 0.030% of S, 12-14% of Cr, 3.5-4.0% of Cu, 1.0-1.5% of Mo, 1.5-2.5% of Ni, 0.1-0.3% of V and Ti, 0.01-0.05% of N, 0.001-0.008% of B and the balance of Fe. The heat treatment method of the martensite antibacterial stainless steel comprises the following steps of: carrying out solution treatment for 0.5-1 hour at the temperature of 1000-1100 DEG C, carrying out oil cooling to room temperature; insulating for 2-6 hours at the temperature of 500-800 DEG C, and carrying out air cooling to room temperature; carrying out solution treatment for 3-10 minutes at the temperature of 980-1020 DEG C, carrying out oil cooling to room temperature; and insulating for 1-2 hours at the temperature of 150-250 DEG C, and carrying out air cooling to room temperature. The martensite antibacterial stainless steel provided by the invention can be widely applied to the fields of sanitary ware, food appliance, tableware, cutting tools and medical devices and has unique broad-spectrum antibacterial property and more excellent corrosion resisting property.
Description
Technical field
The invention belongs to stainless material field, be specifically related to a kind of novel martensite antimicrobial stainless steel and heat treating method and application.
Background technology
Stainless invention is a significant achievement on world's history of metallurgy, and stainless production is that important material technological foundation has been established in industry and scientific-technical progress.Stainless steel is widely applied in food, food and drink, health, communal facility, industry and people's daily life.Along with the continuous generation of the public health event such as SARS, bird flu, people are more and more higher to the clean and hygienic requirements of living environment, household utensils.People wish Stainless Steel Ware except having feature stainless and attractive in appearance, also will have other function such as anti-go mouldy, antibacterial.So, intersecting and a kind of type material of developing as Materials science and environmental science, anti-bacteria stainless steel arises at the historic moment.
Anti-bacteria stainless steel has the dual characteristics of structure and antibacterial concurrently, not only have nontoxic, broad-spectrum antimicrobial, antibacterial timeliness long, do not produce the features such as resistance, and be also that other type anti-biotic material is incomparable at aspects such as goods are wear-resisting, attractive in appearance.The research and development of anti-biotic material, by the every nook and cranny that makes human immune system expand human living space to, all has very important realistic meaning and economic worth to improving people's living standard and social development.
In stainless steel, the appropriate copper (Cu) that adds is the important technology approach that develops anti-bacteria stainless steel novel material.In published copper-bearing antibacterial stainless steel, mainly contain the copper-bearing antibacterial stainless steel of austenite, ferrite, martensite three macrostructure types.These anti-bacteria stainless steels are all substantially on the chemical composition basis of the common stainless steel of original correspondence, by adding amount of copper element and special thermal treatment, and give stainless steel strong and broad-spectrum sterilization function, to the killing rate of the common bacteria such as intestinal bacteria, streptococcus aureus all more than 99%, such as 304(austenitic structure), 430(ferrite structure), 420(martensitic structure) etc. copper-bearing antibacterial stainless steel.
Martensite Stainless Steel is with its high strength and high rigidity feature and be used widely in fields such as sanitary apparatus, food utensil, tableware, cutlery and medicine equipments, 420 class Martensite Stainless Steel is its Typical Representative, and have antibacterial cupric Martensite Stainless Steel exploitation with application will certainly bring new attraction.But that the main deficiency of Martensite Stainless Steel is exactly its solidity to corrosion is relatively poor compared with other structure type stainless steel, its product development and application are restricted.
Molybdenum (Mo) is alloy element conventional in steel, and it is except the carbide with the Mo that improves the hardening capacity of steel and can form disperse distribution under middle temperature is (as Mo
2c) outside the matrix effect of strengthening steel, in austenitic stainless steel, be also used to further improve corrosion resistance nature, the especially pitting resistance of material.As in 316L austenitic stainless steel owing to adding the Mo element of 2-3%, and its resistance to spot corrosion (particularly chloride ion corrosion) performance is significantly improved.
Summary of the invention
The object of the present invention is to provide a kind of novel martensite antimicrobial stainless steel with broad-spectrum antimicrobial function and excellent anticorrosive performance, and its heat treating method and Application Areas are provided, to promote the application more widely of martensite antimicrobial stainless steel.
For achieving the above object, technical scheme of the present invention is:
A kind of novel martensite antimicrobial stainless steel, by weight percentage, this stainless chemical composition is as follows:
C:0.20-0.25%; Si:<1.0%; Mn:<1.0%; P:<0.035%; S:<0.030%; Cr:12-14%; Cu:3.5-4.0%; Mo:1.0-1.5%; Ni:1.5-2.5%; (V+Ti): 0.1-0.3%; N:0.01-0.05%; B:0.001-0.008%; Surplus is Fe.
Described martensite antimicrobial stainless steel, by weight percentage, this stainless chemical composition is preferably as follows:
C:0.22-0.24%; Si:<1.0%; Mn:<1.0%; P:<0.035%; S:<0.030%; Cr:12.5-13.5%; Cu:3.5-3.8%; Mo:1.2-1.4%; Ni:1.8-2.0%; (V+Ti): 0.15-0.25%; N:0.03-0.05%; B:0.003-0.005%; Surplus is Fe.
The design philosophy of martensite antimicrobial stainless steel of the present invention is:
Cu element is the important alloying element in this stainless steel, is to ensure that stainless steel possesses the prerequisite of antibacterial.Cu content in stainless steel of the present invention is 3.5-4.0(wt) %, to ensure, under special thermal treatment condition, separating out copper-rich phase in steel, thereby there is good antimicrobial property.
Cr element is alloying element fixing in Martensite Stainless Steel, and its effect is to form dense oxidation film and give stainless steel certain corrosion-resistant effect at stainless steel surface.
C element is the reinforced alloys element in Martensite Stainless Steel, and it is the strengthening element of martensitic stucture in stainless steel, makes Martensite Stainless Steel keep higher intensity and hardness.
The effect of Mo element is the corrosion resistance nature that further improves Martensite Stainless Steel under solid solution condition, and the carbide that can improve the hardening capacity of steel and can form the Mo that disperse distributes under middle temperature is (as Mo
2c) and strengthening steel matrix.
V and Ti element can make the carbide of chromium in steel transfer to form the carbide of V and Ti, and crystal grain thinning, the even dispersion of precipitated phase are distributed and are played a driving role, thereby improve stainless mechanical property, corrosion resistance nature and anti-microbial property.
Ni element can improve the corrosion resistance nature of steel, and improves the temper resistance of Martensite Stainless Steel.Suitably add a small amount of Ni δ-ferritic formation when suppressing high temperature solid solution and process favourable, also contribute to improve toughness.
N element can improve the hardening capacity of steel, and raising material air cooling obtains the ability of complete martensitic stucture.Can be combined with V and form nitride or the carbonitride of MX type, contribute to improve creep-resistant property.In addition, N element can also further improve stainless corrosion resistance.
B element can significantly increase the hardening capacity of steel, and raising material air cooling obtains the ability of complete martensitic stucture.In addition, also can there is segregation and fill up crystal boundary room in B, thereby can stop carbide M on crystal boundary on crystal boundary
23c
6alligatoring, thereby suppress the tertiary creep stage in the preferentially generation of creep of grain boundaries.
Smelting and the working method of novel martensite antimicrobial stainless steel of the present invention and existing Martensite Stainless Steel are basic identical, but need to increase special thermal treatment method, comprise the steps:
(1) 1000-1100 DEG C of solution treatment 0.5-1 hour, fully solid solution is in matrix to make copper in steel, and oil cooling, to room temperature, makes copper in steel in hypersaturated state;
(2) at 500-800 DEG C of insulation 2-6 hour, oversaturated copper is separated out from steel, form the copper-rich phase of q.s, air cooling is to room temperature;
(3) 980-1020 DEG C of solution treatment 3-10 minute, oil cooling, to room temperature, while making martensite antimicrobial stainless steel keep the higher hardness of quenching state, is controlled the dissolving of rich copper precipitated phase, and is made the abundant solid solution of Mo in matrix;
(4) 150-250 DEG C of insulation 1-2 hour, the internal stress forming while quenching to eliminate, air cooling is to room temperature.
Novel martensite antimicrobial stainless steel in the present invention can be widely used in the stainless steel product of the field requirement high strength such as sanitary apparatus, food utensil, tableware, cutlery and medicine equipment, high rigidity.
The invention has the beneficial effects as follows:
(1) in Martensite Stainless Steel of the present invention, added copper, after special thermal treatment, in stainless steel base, be distributed with rich copper precipitated phase, thereby give the antimicrobial characteristic of Martensite Stainless Steel excellence.
(2) the present invention, by add a certain amount of Mo, N element in Martensite Stainless Steel, makes the corrosion resisting property of Martensite Stainless Steel more excellent.
(3) martensite antimicrobial stainless steel that is added with copper and molybdenum element in the present invention has improved stainless steel performance, has enriched the material product kind of martensite antimicrobial stainless steel, has promoted the application more widely of martensite antimicrobial stainless steel.
(4) the present invention has creatively added the elements such as Ti, Ni, V, N and B, in improving the solidity to corrosion and hardening capacity of steel, also improves material air cooling and obtain the ability of complete martensitic stucture.
Brief description of the drawings
Fig. 1 is the polarization curve of embodiment 1, and wherein curve 1 is contrast Martensite Stainless Steel, and curve 2 is martensite antimicrobial stainless steel.
Fig. 2 is the X-ray diffraction curve of embodiment 2.
Fig. 3 is the metallographic structure shape appearance figure that embodiment 2 obtains.
Fig. 4 is that embodiment 4 kills colibacillary effect photo.Wherein, a left side: martensite antimicrobial stainless steel, the right side: contrast 420 class Martensite Stainless Steel.
Fig. 5 is the effect photo that embodiment 4 kills streptococcus aureus.Wherein, a left side: martensite antimicrobial stainless steel; Right: contrast 420 class Martensite Stainless Steel.
Embodiment
In following examples, provide the detection method of martensite antimicrobial stainless steel anti-microbial property: with reference to related standards, the test strain of selecting is intestinal bacteria (Escherichia coli 25922) and streptococcus aureus (Staphylococcus aureus 25923), calculates according to the following equation the sterilizing rate after anti-bacteria stainless steel and control sample (common stainless steel or other solid material without sterilizing ability) act on common bacteria (intestinal bacteria, streptococcus aureus etc.):
In sterilizing rate (%)=[(control sample viable count-anti-bacteria stainless steel viable count)/control sample viable count] × 100 formulas: control sample viable count is to carry out the viable count after microbial culture on control sample, anti-bacteria stainless steel viable count refers to and on anti-bacteria stainless steel, carries out the viable count after microbial culture.
Following examples also provide the electrochemical test method of martensite antimicrobial stainless steel corrosion resistance nature: adopt conventional electrochemistry three-electrode system method, on CHI660A workstation, sample is carried out to polarization curve test, reference electrode is KCl saturated calomel electrode, be platinum electrode to electrode, sweep velocity is 0.5mV/s.Before test, on metallographic pre-mill, sample is ground to 2000 step by step
#sand paper, tested media is that concentration is 8.5 ‰ NaCl normal saline solution, experimental temperature is 25 DEG C.By testing the corrosion potential of different samples, investigate its corrosion resistance nature.
The reference substance that following examples are selected is 420 class Martensite Stainless Steel.
Embodiment 1
In the present embodiment, following (wt) % of the chemical composition of martensite antimicrobial stainless steel:
C:0.20%; Si:0.35%; Mn:0.45%; P:0.005%; S:0.003%; Cr:12.18%; Cu:3.58%; Mo:1.10%; Ni:1.58%; Ti:0.12%; V:0.08%; N:0.04%; B:0.003%; Surplus is Fe.
Above-mentioned martensite antimicrobial stainless steel, after vacuum induction is smelted, is forged into rod at 1120 DEG C.The thermal treatment process of martensite antimicrobial stainless steel is:
(1) at 1040 DEG C of insulation 0.5h, fully solid solution is in matrix to make copper in steel, and oil cooling, to room temperature, makes copper in steel in hypersaturated state;
(2) at 700 DEG C of insulation 6h, make oversaturated copper from steel, separate out the copper-rich phase of q.s, air cooling is to room temperature afterwards;
(3) at 1000 DEG C of insulation 3min, oil cooling is to room temperature;
(4) 150 DEG C of insulation 1h tempering.
To above-mentioned martensite antimicrobial stainless steel, carry out anti-microbial property detection according to standard regulations such as " JIS Z 2801-2000 " antibacterial fabricated product-germ resistance test method and antibacterial effect ", GB/T 21510-2008 " nano inorganic material anti-microbial property detection method " ", detected result is: the sterilizing rate to intestinal bacteria (Eschericher Coli): >=99.9%; Sterilizing rate to streptococcus aureus (Staphyococcus aureus): >=99.9%.Show that the martensite antimicrobial stainless steel in embodiment 1 has excellent antibacterial.
Adopt electrochemical test method to carry out polarization curve test to the martensite antimicrobial stainless steel of the present embodiment, result shows as Fig. 1, the pitting potential of the cupric molybdenum type martensite antimicrobial stainless steel of the present embodiment, apparently higher than contrast 420 class Martensite Stainless Steel, demonstrates better corrosion resistance nature.
Embodiment 2
In the present embodiment, following (wt) % of the chemical composition of martensite antimicrobial stainless steel:
C:0.21%; Si:0.25%; Mn:0.40%; P:0.008%; S:0.010%; Cr:12.76%; Cu:3.66%; Mo:1.15%; Ni:2.12%; Ti:0.08; V:0.10%; N:0.045%; B:0.004%; Surplus is Fe.
Above-mentioned martensite antimicrobial stainless steel, after vacuum induction is smelted, is forged into rod at 1120 DEG C.The thermal treatment process of martensite antimicrobial stainless steel is:
(1) at 1040 DEG C of insulation 0.5h, fully solid solution is in matrix to make copper in steel, and water-cooled, to room temperature, makes copper in steel in hypersaturated state;
(2) at 700 DEG C of insulation 6h, make oversaturated copper from steel, separate out the copper-rich phase of q.s, air cooling is to room temperature afterwards;
(3) through 1000 DEG C of insulation 5min, oil cooling is to room temperature;
(4) 150 DEG C of insulation 1h, tempering.
According to standards such as " JIS Z 2801-2000 " antibacterial fabricated product-germ resistance test method and antibacterial effect ", GB/T21510-2008 " nano inorganic material anti-microbial property detection method " ", its detected result is: the sterilizing rate to intestinal bacteria (Eschericher Coli): >=99.9%; Sterilizing rate to streptococcus aureus (Staphyococcusaureus): >=99.9%, show that the anti-bacteria stainless steel of the present embodiment has excellent antibacterial.
The present embodiment 2, with respect to embodiment 1, has increased soaking time in the step (3) of thermal treatment process.
The present embodiment is after above-mentioned thermal treatment, visible in Fig. 2: locate to occur a new peak in 2 θ=43.09 °, with Cu(111) diffraction peak corresponding, show to have separated out copper-rich phase in this sample, this is the prerequisite that martensite antimicrobial stainless steel possesses antimicrobial characteristic.Accompanying drawing 3 is typical tempered martensite, shows that material matrix is organized as martensitic structure after above-mentioned thermal treatment.
Embodiment 3:
In the present embodiment, the main component of martensite antimicrobial stainless steel is (wt) %:
C:0.22%; Si:0.45%; Mn:0.50%; P:0.012%; S:0.008%; Cr:14%; Cu:3.72%; Mo:1.23%; Ti:0.10%; V:0.12%; Ni:1.8%; N:0.05%; B:0.005%; Surplus is Fe.
Above-mentioned martensite antimicrobial stainless steel, after vacuum induction is smelted, is forged into rod at 1120 DEG C, and the thermal treatment process of martensite antimicrobial stainless steel is:
(1) at 1040 DEG C of insulation 0.5h, fully solid solution is in matrix to make copper in steel, and water-cooled, to room temperature, makes copper in steel in hypersaturated state;
(2) at 700 DEG C of insulation 6h, make oversaturated copper from steel, separate out the copper-rich phase of q.s, air cooling is to room temperature afterwards;
(3) through 1000 DEG C of insulation 3min, oil cooling is to room temperature;
(4) 150 DEG C of insulation 1h, tempering.
According to standards such as " JIS Z 2801-2000 " antibacterial fabricated product-germ resistance test method and antibacterial effect ", GB/T21510-2008 " nano inorganic material anti-microbial property detection method " ", its detected result is:
(1) sterilizing rate to intestinal bacteria (Eschericher Coli): >=99.9%;
(2) sterilizing rate to streptococcus aureus (Staphyococcus aureus): >=99.9%.
In the present embodiment 3, with respect to embodiment 1 and 2, improve the Mo content in martensite antimicrobial stainless steel, through electro-chemical test, the pitting potential of anti-bacteria stainless steel, apparently higher than the corrosion potential of contrast 420 class Martensite Stainless Steel, further shows that cupric molybdenum type anti-bacteria stainless steel corrosion resistance nature is significantly better than contrasting stainless steel.
Embodiment 4:
In the present embodiment, the main component of martensite antimicrobial stainless steel is (wt) %:
C:0.23%; Si:0.39%; Mn:0.54%; P:0.015%; S:0.012%; Cr:13.5%; Cu:3.75%; Mo:1.35%; Ti:0.08%; V:0.13%; Ni:2.0%; N:0.045%; B:0.0045%; Surplus is Fe.
Above-mentioned martensite antimicrobial stainless steel, after vacuum induction is smelted, is forged into rod at 1120 DEG C, and the thermal treatment process of martensite antimicrobial stainless steel is:
(1) at 1040 DEG C of insulation 0.5h, fully solid solution is in matrix to make copper in steel, and water-cooled, to room temperature, makes copper in steel in hypersaturated state;
(2) at 700 DEG C of insulation 6h, make oversaturated copper from steel, separate out the copper-rich phase of q.s, air cooling is to room temperature afterwards;
(3) through 1000 DEG C of insulation 8min, oil cooling is to room temperature;
(4) 150 DEG C of insulation 1h, tempering.
According to standards such as " JIS Z 2801-2000 " antibacterial fabricated product-germ resistance test method and antibacterial effect ", GB/T21510-2008 " nano inorganic material anti-microbial property detection method " ", its detected result is:
(1) sterilizing rate to intestinal bacteria (Eschericher Coli): >=99.9%;
(2) sterilizing rate to streptococcus aureus (Staphyococcus aureus): >=99.9%.
In accompanying drawing 4 and accompanying drawing 5, can significantly see sterilization effect.
The present embodiment 4 is compared with first three embodiment, increase the time of 1000 DEG C of insulations in the content of Mo and thermal treatment, by the martensite antimicrobial stainless steel of the present embodiment with contrast 420 class Martensite Stainless Steel and after 10 days, observe in soaking at room temperature through physiological saline, show that cupric molybdenum type martensite antimicrobial stainless steel surface still has gloss, without obvious corrosion phenomenon; And Large-Area-Uniform corrosion phenomenon appears in contrast 420 class martensitic stainless steel face, show that corrosion resistance nature of the present invention is better than contrasting stainless steel.
Martensite antimicrobial stainless steel of the present invention is applied to the fields such as sanitary apparatus, food utensil, tableware, cutlery and medicine equipment, has unique broad spectrum antibacterial performance and more excellent corrosion resisting property.
Claims (5)
1. a martensite antimicrobial stainless steel, is characterized in that: by weight percentage, this stainless chemical composition is as follows:
C:0.21%; Si:0.25%; Mn:0.40%; P:0.008%; S:0.010%; Cr:12.76%; Cu:3.66%; Mo:1.15%; Ni:2.12%; Ti:0.08; V:0.10%; N:0.045%; B:0.004%; Surplus is Fe.
2. a martensite antimicrobial stainless steel, is characterized in that: by weight percentage, this stainless chemical composition is as follows:
C:0.22%; Si:0.45%; Mn:0.50%; P:0.012%; S:0.008%; Cr:14%; Cu:3.72%; Mo:1.23%; Ti:0.10%; V:0.12%; Ni:1.8%; N:0.05%; B:0.005%; Surplus is Fe.
3. a martensite antimicrobial stainless steel, is characterized in that: by weight percentage, this stainless chemical composition is as follows:
C:0.23%; Si:0.39%; Mn:0.54%; P:0.015%; S:0.012%; Cr:13.5%; Cu:3.75%; Mo:1.35%; Ti:0.08%; V:0.13%; Ni:2.0%; N:0.045%; B:0.0045%; Surplus is Fe.
4. according to the heat treating method of the martensite antimicrobial stainless steel one of claims 1 to 3 Suo Shu, it is characterized in that: comprise the steps:
(1) 1000-1100 DEG C of solution treatment 0.5-1 hour, oil cooling is to room temperature;
(2) at 500-800 DEG C of insulation 2-6 hour, air cooling is to room temperature;
(3) 980-1020 DEG C of solution treatment 3-10 minute, oil cooling is to room temperature;
(4) 150-250 DEG C of insulation 1-2 hour, air cooling is to room temperature.
5. the described martensite antimicrobial stainless steel of one of claims 1 to 3 requires the stainless steel product of high strength, high rigidity for the manufacture of sanitary apparatus, food utensil, tableware, cutlery or medicine equipment.
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| CN201210478475.2A CN102978535B (en) | 2012-11-22 | 2012-11-22 | Novel martensite antibacterial stainless steel as well as heat treatment method and application thereof |
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| CN201210478475.2A CN102978535B (en) | 2012-11-22 | 2012-11-22 | Novel martensite antibacterial stainless steel as well as heat treatment method and application thereof |
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| CN102978535B true CN102978535B (en) | 2014-12-10 |
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| CN1497058A (en) * | 2000-10-18 | 2004-05-19 | ס�ѽ�����ҵ��ʽ���� | Stainless steelused for brake disk of disk type brake |
| CN101205592A (en) * | 2006-12-19 | 2008-06-25 | 中国科学院金属研究所 | Martensitic antibiotic stainless steel and thermal treatment method thereof |
| CN102330022A (en) * | 2011-09-09 | 2012-01-25 | 天津石泰集团有限公司 | Novel martensite antimicrobial stainless steel, thermal processing method and application thereof |
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| CN1497058A (en) * | 2000-10-18 | 2004-05-19 | ס�ѽ�����ҵ��ʽ���� | Stainless steelused for brake disk of disk type brake |
| CN101205592A (en) * | 2006-12-19 | 2008-06-25 | 中国科学院金属研究所 | Martensitic antibiotic stainless steel and thermal treatment method thereof |
| CN102330022A (en) * | 2011-09-09 | 2012-01-25 | 天津石泰集团有限公司 | Novel martensite antimicrobial stainless steel, thermal processing method and application thereof |
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