CN108441783A - Food-grade high abrasion martensite stainless steel material and preparation method thereof - Google Patents
Food-grade high abrasion martensite stainless steel material and preparation method thereof Download PDFInfo
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- CN108441783A CN108441783A CN201810183881.3A CN201810183881A CN108441783A CN 108441783 A CN108441783 A CN 108441783A CN 201810183881 A CN201810183881 A CN 201810183881A CN 108441783 A CN108441783 A CN 108441783A
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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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Mechanical Engineering (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The present invention relates to a kind of food-grade high abrasion martensite stainless steel materials and preparation method thereof, belong to stainless steel material field.The weight percent composition of the stainless steel is：C：0.4~0.5%, Cr：16.0~16.5%, Ni：0.4~0.5%, Mo：0.8~0.9%, Mn：0.3~0.4%, Si：0.3~0.4%, P：＜ 0.03%, S：＜ 0.01%, surplus are iron and inevitable impurity, and the stainless steel can also contain Cu：1.5~2.2%.The present invention is by adding the C and Cr of high level with the corrosion resisting property of balancing material；Cr equivalents are controlled, martensitic structure is obtained, ensure that delta ferrite level is less than 2%；By adjusting the mass ratio of Mo and C, consolidate C with Mo and ensure corrosion resistance, while appropriate Cu and optimization material preparation process is added, and then obtains the disperse educt of carbide and copper-rich phase containing molybdenum, it is final to obtain the martensitic matrix of high rigidity, while there is broad spectrum antibacterial performance.
Description
Technical field
The invention belongs to stainless steel material fields, and in particular to a kind of food-grade high abrasion martensite stainless steel material and its
Preparation method, more particularly to a kind of metalic tableware product have both the stainless steel of excellent corrosion resistance with mar-proof, high rigidity, antibacterial
Material and preparation method thereof, which is mainly used in manufacture stainless steel tableware, such as chopsticks, knife, fork, spoon.
Background technology
With the increasingly raising of people's living standard, the quality requirements of daily necessities are also improved constantly.Meal
Tool just belongs to this kind of product, and people not only require it with excellent corrosion resistance characteristic, can be recycled, beautiful and generous, appearance
Easy cleaning and the features such as be hardly damaged, also requires it with antibacterial functions.In recent years, stainless steel tableware is with its excellent synthesis
Performance is increasingly liked by people, it has also become the essential preferred meal such as Domestic dining table, Chinese and Western dining room, high-grade hotel
Tool.
Food-grade stainless steel refers to the part of food machinery contact food, it is necessary to meet the requirement of certain food security.State
Family's standard《GB 4806.9-2016 national food safety standard food contact metal materials and product》To food-grade stainless steel
In heavy metal ion the amount of migration have stringent limitation.Currently, the material made used in food-grade stainless steel tableware in the market is big
Body can be divided into 430,304 (18-8), 18-10 three grades.Stainless steel used is according to the cost of raw material and corrosion-resistant spy
The difference of property, is divided into high, medium and low tableware.But their common disadvantages are that the material is soft, and hardness is insufficient.With after a period of time
Afterwards, tableware is susceptible to surface scratch by repeatedly scouring, mutually collision etc., influences aesthetic effect, and corrosion resistance reduces.Cause
This, the quality of stainless steel tableware surface scratch resistance is paid close attention to by manufacturer and consumer.To improve this problem, some
Manufacturer is that consumer carries out periodically freely returning factory's polishing treatment, but causes being significantly increased for cost to manufacturer in this way,
It makes troubles simultaneously to consumer.Therefore, it is necessary to provide a kind of high rigidity, low cost, and there is scratch resistant stainless steel
New material, with solve the problems, such as current stainless steel tableware easily occur cut this.
Invention content
For this problem, the purpose of the present invention is to provide a kind of metalic tableware product high rigidity, scratch resistant foods
Grade martensite stainless steel material, while the material also has anti-microbial property and excellent corrosion resisting property.
The present invention design philosophy be：
By adding the C and Cr of high level to balance corrosion resisting property；The expensive Ni elements of a small amount of addition, with reduce at
This；Cr equivalents are controlled, martensitic structure is obtained, high temperature delta ferrite is avoided to occur, ensure that its content is less than 2%；Adjust Mo and C
Mass ratio, C is consolidated with Mo, prevents C and Cr from forming carbide, reduces corrosion resistance；Appropriate Cu is added, and optimizes material preparation work
Skill, so in steel obtain carbide and copper-rich phase containing molybdenum disperse educt, improve the hardness of steel, while making it have antibacterial
Performance.Pass through new composition design, it is proposed that a kind of stainless steel having both excellent corrosion resistance with mar-proof, high rigidity, antibacterial
Material.
The technical scheme is that：
A kind of food-grade high abrasion martensite stainless steel material, chemical composition (weight percent) are：C：0.4~
0.5%, Cr：16.0~16.5%, Ni：0.4~0.5%, Mo：0.8~0.9%, Mn：0.3~0.4%, Si：0.3~
0.4%, P：＜ 0.03%, S：＜ 0.01%, surplus are iron and inevitable impurity.
The chemical composition of the steel also meets：Cr equivalents are less than 8.5, are calculated as follows：
Cr equivalents=Cr%+0.8 × Si%+2 × Mo%-2 × Ni%-0.4 × Mn%-0.6 × Cu%-20 × C%.
The Cu that the chemical composition of the steel is also 1.5~2.2% containing weight percent.
The mass ratio of Mo and C meets in the chemical composition of the steel：Mo/C ＞ 1.8.
The preparation method of above-mentioned stainless steel material, includes the following steps：
(1) the chemical composition mixed raw material is pressed, acquisition stainless steel ingot is smelted and poured into a mould by vacuum induction；
(2) steel ingot is forged in austenite one phase area：Just 1080~1150 DEG C of temperature of forging, 950~1000 DEG C of final forging temperature,
Forging ratio is 6~8, and room temperature is air-cooled to after forging；
(3) heat treatment process after forging：It is air-cooled after 30~60min of heat preservation at 1050~1100 DEG C first, then 550
It is air-cooled after~650 DEG C of 90~120min of heat preservation；Again at 950~1000 DEG C keep the temperature 20-30min after water cooling；Finally 150~250
DEG C heat preservation 120-150min after it is air-cooled.
The stainless steel obtained according to mentioned component and preparation method meets：
Stainless steel is organized as martensite, and delta ferrite level is less than 2% in tissue.
Carbide containing molybdenum and copper-rich precipitated phase in stainless structure of steel.
The hardness of stainless steel is more than 56HRC.
Stainless steel has excellent corrosion resisting property.
Heavy metal transformation amount meets in stainless steel：Arsenic (As)<0.004mg/kg；Cadmium (Cd)<0.002mg/kg；Lead (Pb)<
0.005mg/kg；Chromium (Cr)<0.2mg/kg；Nickel (Ni)<0.05mg/kg.The amount of migration meets the limit value of national standard defined,
Meet the requirement of food contact metal material and product.
Essential element content range is described as follows in the present invention：
C：Carbon is austenite former, expands austenite phase field, reduces ferrite phase region, can inhibit δ iron element in steel
The formation of body.Carbon is intensified element most economical in steel, determines that the essential element of steel hardness, promotion form carbide.C and Mo shapes
At Mo2C-type carbide, in the base even dispersion precipitation play precipitation-hardening effect.But carbon be damage steel it is corrosion proof
Element, crossing high-carbon content causes corrosion resistance to reduce.Therefore carbon addition content is 0.4~0.5% in steel of the present invention.
Cr：Chromium is to determine the corrosion proof primary element of stainless steel, and chromium content is higher, and corrosion resistance is better, but in the present invention, contains
High temperature delta ferrite is easily formed when measuring excessively high, damages the toughness and processing performance of stainless steel.Therefore chromium content should be controlled strictly in the present invention
System is in 16.0~16.5% ranges.
Mo：Molybdenum is ferrite former, and ability is equivalent to chromium.Molybdenum mainly improves hardness other than improving corrosion resistance,
Enhance post-curing effect, is particularly evident in low temperature quenching.Molybdenum is added in stainless steel, it can crystal grain thinning, uniform formation, raising
Toughness improves the intensity and temper resistance of martensitic stain less steel, inhibits the Carbide Precipitation of chromium.The compound action of molybdenum and chromium,
The passivation that stainless steel can be improved and passivation ability again, improve the stability of passivating film, and stainless steel is made to have better anti-corrosion capability.
But excessively high molybdenum content will promote the formation of high temperature delta ferrite, cause some adverse effects.Molybdenum content, which controls, in the present invention is
0.8~0.9%.
Cu：The additive amount of Cu is 1.5-2.2% in the present invention, this is than the Cu contents in existing martensite antimicrobial stainless steel
It decreases, but still ensures that certain anti-microbial property.This is because Mo contents are higher in the present invention, the increase of Mo contents has
Conducive to the precipitation of copper-rich phase.Show the Cu of only addition 1.5-2.2% by test of many times, and passes through preparation of the present invention
Method remains above 98% to the antibiotic rate of Escherichia coli, and anti-microbial property is stablized.This not only reduces the additive amount of Cu,
And positive effect is played to the processing performance of stainless steel of the present invention.
Heat treating regime is described as follows in the present invention：
It is air-cooled after 30~60min of heat preservation at 1050~1100 DEG C, make steel complete austenitizing, organizes full and uniformization.
It is air-cooled after 90~120min of heat preservation at 550~650 DEG C, make oversaturated copper that enough volume fractions be precipitated from steel
Copper-rich phase ensures anti-microbial property.It is precipitated simultaneously a certain amount of containing molybdenum carbide.
Secondary austenitizing is carried out at 950~1000 DEG C, refines original austenite grain；Water cooling after heat preservation 20-30min, carefully
Change martensite lath, improve matrix hardness, while avoiding the excessive back dissolving of precipitated phase being tempered for the first time.
Finally at 150~250 DEG C keep the temperature 120-150min after air-cooled, lonneal, carbide of the secondary precipitation containing molybdenum, together
When ensure stainless steel it is certain obdurability matching.
Preferably heat treatment process is：It is air-cooled after heat preservation 30min at 1070 DEG C first, 100min is then kept the temperature at 580 DEG C
It is air-cooled afterwards；Again at 970 DEG C keep the temperature 25min after water cooling；It is finally air-cooled after heat preservation 120min at 200 DEG C.
The beneficial effects of the invention are as follows：
The present invention can get scratch-resistant by the mutual restriction and allotment of various alloying elements by special preparation method
Trace, high rigidity, antibacterial have both the food-grade stainless steel material of excellent corrosion resistance, can solve stainless steel tableware surface and cut easily occur
The problem of.
Description of the drawings
Fig. 1 is the microscopic structure of embodiment 1 in the present invention.
Fig. 2 is the polarization curve of embodiment 2 in the present invention.
Specific implementation mode
Following embodiment will be further described the present invention, but not thereby limiting the invention.In embodiment
Steel and comparative example in steel case hardness, anti-corrosion, anti-microbial property and heavy metal are carried out after smelting, hot-working and heat treatment
The amount of migration is tested.
Hardness test, load 150kgf, retention time 15s are carried out using rockwell indentation method.
To stainless steel carry out polarization curve test, reference electrode be KCl saturated calomel electrodes, sweep speed 0.5mV/s,
Electrolyte solution is 0.9%NaCl solution.By testing the pitting potential of different instances, its corrosion resistance is investigated.
Anti-microbial property is according to GB/T2591-2003《Antibiotic plastic anti-microbial property experimental method and antibacterial effect》Standard provides
Test.The calculation formula of sterilizing rate is：Sterilizing rate (the %)=[(viable bacteria on the stainless steel sample of viable count-on control sample
Number) viable count on/control sample] × 100, wherein control sample is using 1 stainless steel of following comparative examples, stainless steel sample
Product refer to embodiment 1-4 stainless steels of the present invention.
Heavy metal transformation measures examination according to GB 4806.9-2016《National food safety standard food contact metal material
And product》Standard gauge location survey tries.It is to boil 30 minutes that simulated solution, which uses 4% acetic acid solution, migration test condition, is placed at room temperature for 24
Hour.
Steps are as follows for preparation method：
(1) the chemical composition mixed raw material is pressed, acquisition stainless steel ingot is smelted and poured into a mould by vacuum induction；
(2) steel ingot is forged in austenite one phase area：First 1080~1150 DEG C of forging temperature, final forging temperature 950~1000
DEG C, forging ratio is 6~8, and room temperature is air-cooled to after forging；
(3) heat treatment process after forging chooses preferred parameter, i.e., air-cooled after heat preservation 30min at 1070 DEG C first, then
It is air-cooled after heat preservation 100min at 580 DEG C；Again at 970 DEG C keep the temperature 25min after water cooling；It is finally air-cooled after heat preservation 120min at 200 DEG C.
The chemical composition of embodiment and comparative example is as shown in table 1.
The chemical composition analysis result (weight percent) of 1 embodiment and comparative example of table
| C | Si | Mn | Cr | Ni | Mo | Cu | S | P | Cr equivalents | Mo/C ratios | |
| Embodiment 1 | 0.44 | 0.39 | 0.36 | 16.1 | 0.42 | 0.85 | 2.0 | 0.0012 | 0.019 | 7.1 | 1.9 |
| Embodiment 2 | 0.48 | 0.35 | 0.32 | 16.4 | 0.44 | 0.90 | 1.7 | 0.0018 | 0.019 | 6.9 | 1.9 |
| Embodiment 3 | 0.41 | 0.33 | 0.39 | 16.5 | 0.45 | 0.89 | 1.9 | 0.0013 | 0.020 | 8.1 | 2.2 |
| Embodiment 4 | 0.50 | 0.35 | 0.33 | 16.3 | 0.45 | 0.90 | 2.2 | 0.0017 | 0.021 | 6.0 | 1.8 |
| Comparative example 1 | 0.46 | 0.39 | 0.35 | 18.2 | 0.44 | 0.85 | -- | 0.0012 | 0.019 | 10.0 | 1.8 |
| Comparative example 2 | 0.45 | 0.34 | 0.33 | 15.2 | 0.44 | 0.60 | -- | 0.0015 | 0.021 | 6.7 | 1.3 |
| Comparative example 3 | 0.35 | 0.2 | 0.1 | 16.5 | 0.40 | 0.81 | -- | -- | -- | 10.4 | 2.3 |
| Comparative example 4 | 0.57 | 0.1 | 0.3 | 16.3 | 0.41 | 0.82 | -- | -- | -- | 5.7 | 1.4 |
The performance test results of steel are as shown in table 2 in above-described embodiment 1-4 and comparative example 1-4.
2 embodiment and comparative example the performance test results of table
* it notes：In antibacterial experiment, control sample is 1 steel of comparative example.
3 embodiment and comparative example heavy metal transformation of table measures test result
It can be seen from table 1-2 the present invention by suitably increase chromium, carbon content and optimization other compositions control Cr equivalents,
Adjust Mo/C weight percent, ensure that delta ferrite level is less than 2%, relative to comparative example, improve hardness, high antibacterial it is same
When, maintain excellent corrosion resistance.Comparative example 1 and 3 is anti-corrosion containing 5% or so delta ferrite since chromium equivalent is beyond 8.5
Property and hardness are relatively low, and C content is less in comparative example 3, and hardness is extremely low；Mo/C ratios are unsatisfactory for being more than in comparative example 2 and 4
1.8, the carbide volume fraction of Mo is less in matrix, and hardness is relatively low, and C content is excessively high in comparative example 4, and corrosion resistance is very poor.
As can be seen from Table 3, the heavy metal arsenic (As) in the embodiment of the present invention 1~4, cadmium (Cd), lead (Pb), chromium (Cr),
Nickel (Ni) the amount of migration is not detected, and is below test limits value, well below the limits value of national Specification, reaches " food
Grade " condition；Heavy metal arsenic (As), cadmium (Cd), lead (Pb), nickel (Ni) the amount of migration in comparative example 1 also below test limits value, but
The amount of migration of chromium (Cr) is 0.3mg/kg has chromium (Cr) ion releasing although also reaching " food-grade " condition；In comparative example 2
Chromium (Cr) content is less, and Mo/C ratios are small, and corrosion resistance is poor, causes heavy metal chromium (Cr) the amount of migration exceeded, is unsatisfactory for food-grade material
Material；Although 3 chromium of comparative example (Cr) the amount of migration meets standard requirement, but also have chromium (Cr) ion releasing；4 corrosion resistance pole of comparative example
Difference causes chromium (Cr) the amount of migration to severely exceed.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of food-grade high abrasion martensitic stain less steel, it is characterised in that：By weight percentage, chemical composition is：C：
0.4~0.5%, Cr：16.0~16.5%, Ni：0.4~0.5%, Mo：0.8~0.9%, Mn：0.3~0.4%, Si：0.3~
0.4%, P：＜ 0.03%, S：＜ 0.01%, surplus are iron and inevitable impurity.
2. food-grade high abrasion martensitic stain less steel according to claim 1, it is characterised in that：The stainless steel chemistry at
Divide and also meets：Cr equivalents are less than 8.5, are calculated as follows：
Cr equivalents=Cr%+0.8 × Si%+2 × Mo%-2 × Ni%-0.4 × Mn%-0.6 × Cu%-20 × C%.
3. food-grade high abrasion martensitic stain less steel according to claim 1, it is characterised in that：The steel also contains weight percent
Than the Cu for 1.5~2.2%.
4. according to any food-grade high abrasion martensitic stain less steels of claim 1-3, it is characterised in that：The quality of Mo and C
Than meeting：Mo/C ＞ 1.8.
5. a kind of preparation method of any food-grade high abrasion martensitic stain less steels of claim 1-3, which is characterized in that packet
Include following steps：
(1) mixed raw material is according to chemical composition required, acquisition stainless steel ingot is smelted and poured into a mould by vacuum induction；
(2) steel ingot is forged in austenite one phase area：Just 1080~1150 DEG C of temperature of forging, 950~1000 DEG C of final forging temperature, forging
Than being 6~8, room temperature is air-cooled to after forging；
(3) it is heat-treated after forging.
6. the preparation method of food-grade high abrasion martensitic stain less steel according to claim 5, it is characterised in that：Step (3)
In heat treatment process be：It is air-cooled after 30~60min of heat preservation at 1050~1100 DEG C first, 90 are then kept the temperature at 550~650 DEG C
It is air-cooled after~120min；Again at 950~1000 DEG C keep the temperature 20-30min after water cooling；120- is finally kept the temperature at 150~250 DEG C
It is air-cooled after 150min.
7. the preparation method of food-grade high abrasion martensitic stain less steel according to claim 6, it is characterised in that：It is heat-treated work
Skill is：It is air-cooled after heat preservation 30min at 1070 DEG C first, it is then air-cooled after heat preservation 100min at 580 DEG C；It is kept the temperature again at 970 DEG C
Water cooling after 25min；It is finally air-cooled after heat preservation 120min at 200 DEG C.
8. the preparation method of food-grade high abrasion martensitic stain less steel according to claim 5, it is characterised in that：Gained is stainless
Steel is organized as martensite, and delta ferrite level is less than 2% in tissue；Carbide and richness containing molybdenum in the stainless structure of steel of gained
Copper precipitated phase.
9. the preparation method of food-grade high abrasion martensitic stain less steel according to claim 5, it is characterised in that：Gained is stainless
The hardness of steel is more than 56HRC.
10. the preparation method of the wear-resisting martensitic stain less steel of food-grade according to claim 5, it is characterised in that：Gained is stainless
Heavy metal transformation amount meets in steel：Arsenic<0.004mg/kg；Cadmium<0.002mg/kg；Lead<0.005mg/kg；Chromium<0.2mg/kg；Nickel
<0.05mg/kg。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182927A (en) * | 2018-11-01 | 2019-01-11 | 晋大纳米科技（厦门）有限公司 | A kind of strong anti-microbial property martensitic stain less steel and its heat treatment method and application |
| CN113846275A (en) * | 2020-06-28 | 2021-12-28 | 中国科学院金属研究所 | Antibacterial stainless steel material with ultrahigh strength and high toughness and preparation method thereof |
| CN114855094A (en) * | 2022-05-23 | 2022-08-05 | 东北大学 | Corrosion-resistant antibacterial martensitic stainless steel and preparation method and application thereof |
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| CN107002211A (en) * | 2014-11-26 | 2017-08-01 | Posco公司 | High hardness martensitic stainless steel with excellent antibacterial and preparation method thereof |
| CN104328353A (en) * | 2014-12-01 | 2015-02-04 | 什邡新工金属材料有限公司 | Rare-earth-type 0Cr17Ni4Cu4Nb martensitic precipitation-hardening stainless steel and preparation method thereof |
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| CN109182927A (en) * | 2018-11-01 | 2019-01-11 | 晋大纳米科技（厦门）有限公司 | A kind of strong anti-microbial property martensitic stain less steel and its heat treatment method and application |
| CN113846275A (en) * | 2020-06-28 | 2021-12-28 | 中国科学院金属研究所 | Antibacterial stainless steel material with ultrahigh strength and high toughness and preparation method thereof |
| CN113846275B (en) * | 2020-06-28 | 2023-06-13 | 中国科学院金属研究所 | Antibacterial ultra-high strength high toughness stainless steel material and preparation method thereof |
| CN114855094A (en) * | 2022-05-23 | 2022-08-05 | 东北大学 | Corrosion-resistant antibacterial martensitic stainless steel and preparation method and application thereof |
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