CN1704497A - Corrosion-resistant and antibacterial low-nickel austenitic stainless steel - Google Patents
Corrosion-resistant and antibacterial low-nickel austenitic stainless steel Download PDFInfo
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- CN1704497A CN1704497A CN 200410047238 CN200410047238A CN1704497A CN 1704497 A CN1704497 A CN 1704497A CN 200410047238 CN200410047238 CN 200410047238 CN 200410047238 A CN200410047238 A CN 200410047238A CN 1704497 A CN1704497 A CN 1704497A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 41
- 238000005260 corrosion Methods 0.000 title claims abstract description 29
- 230000007797 corrosion Effects 0.000 title claims abstract description 29
- 229910000963 austenitic stainless steel Inorganic materials 0.000 title claims abstract description 26
- 230000000844 anti-bacterial effect Effects 0.000 title abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 239000011651 chromium Substances 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 239000011573 trace mineral Substances 0.000 claims abstract description 7
- 235000013619 trace mineral Nutrition 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 238000009628 steelmaking Methods 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 22
- 239000010935 stainless steel Substances 0.000 claims description 21
- 238000005098 hot rolling Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 238000007669 thermal treatment Methods 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 29
- 241000894006 Bacteria Species 0.000 description 10
- 206010070834 Sensitisation Diseases 0.000 description 10
- 230000008313 sensitization Effects 0.000 description 10
- 229910001566 austenite Inorganic materials 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 230000000845 anti-microbial effect Effects 0.000 description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 230000032683 aging Effects 0.000 description 6
- 238000005275 alloying Methods 0.000 description 6
- 238000005097 cold rolling Methods 0.000 description 6
- 239000000470 constituent Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 6
- 239000004332 silver Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 230000003115 biocidal effect Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 241000191967 Staphylococcus aureus Species 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003359 percent control normalization Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000001235 sensitizing effect Effects 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000011081 inoculation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241000206672 Gelidium Species 0.000 description 1
- 235000010419 agar Nutrition 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a corrosion-resistant and antibacterial low-nickel austenitic stainless steel comprising, 0.03-0.12 wt% of carbon, 0.2-1.0 wt% of silicon, 7.5-10.5 wt% of manganese, 14.0-16.0 wt% of chromium, 1.0-5.0 wt% of nickel, 0.04-0.25 wt% of nitrogen, 2.0-5.0 wt% of copper, balancing ferrum and unavoidable trace elements produced in the steelmaking process.
Description
Technical field
The present invention relates to composition of a kind of stainless composition, particularly a kind of austenitic stainless steel and preparation method thereof.
Background technology
In recent years, along with expanding economy and growth in the living standard, stainless steel is used widely, wherein, austenitic stainless steel is because of having excellent solidity to corrosion, processibility, and is used in household implements (for example kitchen tools, sanitary bath equipment) and various hardware or the like aspect more widely.
Must add a large amount of nickel (Ni) in order in austenitic stainless steel, to obtain stable austenite, and owing to the content of nickel on the earth is abundant, demand to this element but increases day by day simultaneously, therefore cause the cost value of nickel to raise successively, and then cause nickeliferous stainless price volalility very big, and when price is lasting high, obviously austenitic stainless steel is the advantage of therefore forfeiture and the competition of other metals, therefore, the stainless steel of exploitation low nickel content becomes one of emphasis of industry research and development competition in the hope of obtaining the relative cost advantage.Simultaneously, in recent years, because Economic development, growth in the living standard, the demand of making clean demanding equipment (for example food machine, kitchen cabinet, medical machine etc.) when using with the stainless steel that possesses germ resistance to a certain degree (for example argentiferous or contain the stainless steel of separating out copper-rich phase) also day by day increases.
And recently, have the exploitation of the austenitic stainless steel of antibacterial effect, all be with general 304 be stainless steel as mother metal, focus on the exploitation of germ resistance again.For instance, it is the austenitic stainless steel of 8.3 weight % that No. 459057 patent application of TaiWan, China discloses nickel content, and adding " silver " makes it have antibacterial effect.No. 383340 patent application of TaiWan, China then discloses nickel content between 7-10 weight %, and adding " copper " makes it have the stainless steel of antibacterial effect.
As everyone knows, silver is a kind of precious metal, and adding silver makes stainless steel have the obvious meeting of germ resistance so cause cost significantly to improve, so be mostly at present to make stainless steel have the main flow that germ resistance is researchdevelopment with interpolation copper.But, up to now, though the existing many producers of the stainless exploitation of low nickel content drop into research, not with austenitic stainless steel with low content of nickel with germ resistance as research object.
When desiring to make austenitic stainless steel to have antibiotic effect by adding copper, must between 700 ℃～950 ℃, implement timeliness thermal treatment, copper-rich phase is wherein separated out, just can have antibacterial effect, but this moment again must controlled temperature can not be too high, in order to avoid copper solid solution and not separating out.But thus, will pass through the sensitizing temperature district (480 ℃～800 ℃) of austenitic stainless steel inevitably, thereby can't take into account the requirement of " solidity to corrosion " and " germ resistance ".
Therefore how to avoid sensitizing temperature, to keep under the corrosion proof prerequisite of austenitic stainless steel, develop with the austenitic stainless steel of " low nickel content " and " antibiotic effect ", make its have price competitiveness simultaneously, promote easier, and meet the advantage of current health care environmental sanitation demand, be the target that industry constantly makes great efforts to study improvement.
Summary of the invention
Therefore, the objective of the invention is, on the basis of low nickel content, develop a kind of have simultaneously germ resistance and corrosion proof austenitic stainless steel.
A kind of low-nickel austenitic stainless steel that has solidity to corrosion and germ resistance concurrently of the present invention comprises: the carbon of weight percent between 0.03 to 0.12, the silicon of weight percent between 0.2 to 1.0, the manganese of weight percent between 7.5 to 10.5, the chromium of weight percent between 14.0 to 16.0, the nickel of weight percent between 1.0 to 5.0, the nitrogen of weight percent between 0.04 to 0.25, the copper of weight percent between 2.0 to 5.0, multiple in steelmaking process the inevitable iron of trace element and surplus, and this low-nickel austenitic stainless steel is to implement a temperature range at least 850 ℃ to 950 ℃ timeliness thermal treatment, so that the copper-rich phase in the stainless steel is separated out after a hot rolling is handled.
Embodiment
The present invention is described in detail below in conjunction with subordinate list and embodiment:
For making stainless steel have the antimicrobial effect, generally be to reach this purpose, and silver does not meet economic benefit because material cost is come highly far beyond copper, so comparatively common and meet cost benefit to add copper by adding silver or copper.
And nickel, though be the important stable element of austenite phase in the stainless steel, and can increase the ability of anti-reductinic acid and promote cold-working.Because nickel is precious metal, price volalility is big again, if can reduce consumption and can meet the market competition demand but as mentioned above.
Therefore, the present invention relates to a kind of low-nickel austenitic stainless steel that has solidity to corrosion and germ resistance concurrently, it promptly is design by manufacture method and alloying constituent, on the basis of low nickel, cooperate the interpolation of copper, develop the stainless steel that to take into account solidity to corrosion and germ resistance, to save cost that adds nickel and the demand that meets existing market.Thus, the low-nickel austenitic stainless steel that has solidity to corrosion and germ resistance concurrently of the present invention comprises: the carbon of weight percent between 0.03 to 0.12, the silicon of weight percent between 0.2 to 1.0, the manganese of weight percent between 7.5 to 10.5, the chromium of weight percent between 14.0 to 16.0, the nickel of weight percent between 1.0 to 5.0, the nitrogen of weight percent between 0.04 to 0.25, the copper of weight percent between 2.0 to 5.0, multiple in steelmaking process the inevitable iron of trace element and surplus, and the weight percent of sulphur needs less than 0.01 in the various trace elements, and the weight percent of phosphorus need be controlled at less than 0.06.In addition, after the hot rolling of steel embryo, to final finished, implement the timeliness thermal treatment once between 850 ℃ to 950 ℃, carry out at least,, thereby reach the antimicrobial effect so that copper-rich phase wherein separates out.
Carbon is the strong stability element of austenite phase, but simultaneously its weight percent Tai Gaoyi reduces the solidity to corrosion of steel, and easily brings out martensitic phase and cause aging crack, so the present invention is controlled at the addition of carbon between 0.03 weight % and the 0.12 weight %.Simultaneously, in stainless steel refining process, must carry out deoxidation as reductor with silicon, therefore must contain a certain amount of silicon, but silicon itself is again the stable element of ferritic phase and be unfavorable for austenite phase stable of stainless steel, so the present invention is controlled at the silicone content ratio between 0.2 weight % and the 1.0 weight %.
Manganese is the stable element of austenite phase, replaces nickel at this interpolation per-cent with 7.5 weight % to 10.5 weight %, to reach the purpose that reduces cost.
Mainly acting as of chromium is against corrosion, but it is again the stable element of ferritic phase simultaneously, and in order to take into account the stable and raw materials cost of austenite phase, so the adding proportion of chromium is between 14 weight % and 16 weight %.
As previously mentioned, nickel is the mutually important stable element of austenite, and can increase the ability of anti-reductinic acid and promote cold-working, yet in order to reduce cost, the present invention is prerequisite with the low nickel content, and therefore the addition with nickel is limited between 1.0 weight % to the 5.0 weight %.
Higher the stable of austenite phase that more be beneficial to of nitrogen content, can replace the interpolation of part of nickel by this, but has the effect of reinforcement during because of interpolation nitrogen, so it is lower better to add weight percent in can obtaining the prerequisite scope of austenitic iron, so the present invention is limited in its addition between 0.04 weight % to the 0.25 weight %.
No matter owing to add copper or silver-colored in the steel extremely greater than after the predetermined proportion, all has the antimicrobial effect, but because the cost of silver is high than copper, therefore the present invention selects copper, consider that simultaneously adding too much copper can cause the hot workability variation, therefore add the copper of 2.0 weight % to 5.0 weight %, to reach the ideal antibiotic effect and to take into account hot workability.
And the phosphorus in the various trace elements, sulphur etc. are harmful element, and proportion is lower certainly better, so limit its weight percent respectively less than 0.06,0.01.
By above stated specification as can be known, the present invention mainly is on the basis of low nickel, by interpolation copper and various alloying constituent, and cooperates with suitable aging temp, thereby makes prepared stainless steel with solidity to corrosion and germ resistance.Though aging temp of the present invention is controlled between 850 ℃ to 950 ℃, do not have overlapping with the scope of interval 480 ℃ to 800 ℃ of stainless steel " sensitizing temperature ", the generation of sensitization phenomenon would not be arranged in theory, but the present invention still detects earlier corrosion proof " sensitization experiment ", verifies the solidity to corrosion of the present invention under general environment in advance.
Consult table 1, employed test piece when carrying out corrosion proof sensitization experiment and follow-up antibacterial experiment, be after each alloy iron raw material that contains the different-alloy composition as shown in table 1 is melt into ingot bar, the material of the thick 32mm of the wide 294mm of cut growth 295mm, through the process furnace heating, come out of the stove after 1 hour at constant temperature between 1050～1200 ℃, through 7 times repeat to roll and prolong that to form final thickness be the steel band of 3mm, finishing temperature is between 800 ℃～820 ℃, and air cooling is to room temperature, this test piece is handled through annealing and pickling, formed the hot rolling test piece.Again the hot rolling test piece is cold-rolled to the steel band that thickness is 1mm, handle through annealing and pickling again, the cold rolling test piece of follow-up aging heat treatment is proceeded in formation, whether sensitization (sensitization) phenomenon takes place so that observe metallographic, promptly understand whether produce intergranular corrosion (intergranularcorrosion), and then draw the solidity to corrosion of each the cold rolling test piece that contains the different-alloy composition.
The alloying constituent of [table 1] cold rolling test piece
| Test number | ? ??C | ? ??Si | ? ??Mn | ? ??P | ? ??S | ? ??Cr | ? ??Ni | ? ??Mo | ? ??Cu | ? ??N |
| Control group 1-0 | ??0.037 | ??0.40 | ??7.82 | ??0.033 | ??0.005 | ??15.34 | ??4.09 | ??0.115 | ??1.72 | ??0.029 |
| Experimental group 1-1 | ??0.047 | ??0.40 | ??8.73 | ??0.033 | ??0.005 | ??15.23 | ??4.20 | ??0.105 | ??2.44 | ??0.040 |
| Experimental group 1-2 | ??0.044 | ??0.41 | ??8.76 | ??0.035 | ??0.005 | ??15.32 | ??4.20 | ??0.100 | ??2.94 | ??0.035 |
| Experimental group 1-3 | ??0.060 | ??0.53 | ??8.72 | ??0.021 | ??0.006 | ??15.15 | ??4.15 | ??0.062 | ??4.21 | ??0.036 |
| Control group 2-0 | ??0.037 | ??0.40 | ??7.82 | ??0.033 | ??0.005 | ??15.34 | ??4.09 | ??0.115 | ??1.72 | ??0.029 |
| Experimental group 2-1 | ??0.047 | ??0.40 | ??8.73 | ??0.033 | ??0.005 | ??15.23 | ??4.20 | ??0.105 | ??2.44 | ??0.040 |
| Experimental group 2-2 | ??0.044 | ??0.41 | ??8.76 | ??0.035 | ??0.005 | ??15.32 | ??4.20 | ??0.100 | ??2.94 | ??0.035 |
| Experimental group 2-3 | ??0.060 | ??0.53 | ??8.72 | ??0.021 | ??0.006 | ??15.15 | ??4.15 | ??0.062 | ??4.21 | ??0.036 |
| Control group 3-0 | ??0.037 | ??0.40 | ??7.82 | ??0.033 | ??0.005 | ??15.34 | ??4.09 | ??0.115 | ??1.72 | ??0.029 |
| Experimental group 3-1 | ??0.047 | ??0.40 | ??8.73 | ??0.033 | ??0.005 | ??15.23 | ??4.20 | ??0.105 | ??2.44 | ??0.040 |
| Experimental group 3-2 | ??0.044 | ??0.41 | ??8.76 | ??0.035 | ??0.005 | ??15.32 | ??4.20 | ??0.100 | ??2.94 | ??0.035 |
| Experimental group 3-3 | ??0.060 | ??0.53 | ??8.72 | ??0.021 | ??0.006 | ??15.15 | ??4.15 | ??0.062 | ??4.21 | ??0.036 |
Consult table 2, table 2 is the results of corrosion-resistance that contain each cold rolling test piece of different-alloy composition in the table 1, by test result as can be known, under alloying constituent of the present invention and aging condition restriction, stainless steel of the present invention (being experimental group 2-1,2-2,2-3,3-1,3-2,3-3) does not all have sensitization phenomenon and produces, and has the solidity to corrosion that meets demand.
The test of [table 2] solidity to corrosion
| Test number | Alloying constituent | Aging condition | Whether sensitization |
| Control group 1-0 | ??15Cr-4Ni-1.7Cu | ??700℃/4hrs | ??× |
| Experimental group 1-1 | ??15Cr-4Ni-2.5Cu | ??700℃/4hrs | ??× |
| Experimental group 1-2 | ??15Cr-4Ni-3.0Cu | ??700℃/4hrs | ??× |
| Experimental group 1-3 | ??15Cr-4Ni-4.5Cu | ??700℃/4hrs | ??× |
| Control group 2-0 | ??15Cr-4Ni-1.7Cu | ??850℃/4hrs | ??◎ |
| Experimental group 2-1 | ??15Cr-4Ni-2.5Cu | ??850℃/4hrs | ??◎ |
| Experimental group 2-2 | ??15Cr-4Ni-3.0Cu | ??850℃/4hrs | ??◎ |
| Experimental group 2-3 | ??15Cr-4Ni-4.5Cu | ??850℃/4hrs | ??◎ |
| Control group 3-0 | ??15Cr-4Ni-1.7Cu | ??950℃/4hrs | ??◎ |
| Experimental group 3-1 | ??15Cr-4Ni-2.5Cu | ??950℃/4hrs | ??◎ |
| Experimental group 3-2 | ??15Cr-4Ni-3.0Cu | ??950℃/4hrs | ??◎ |
| Experimental group 3-3 | ??15Cr-4Ni-4.5Cu | ??950℃/4hrs | ??◎ |
*: the serious ◎ of sensitization: no sensitization phenomenon
According to JIS Z 2801 antibacterial experiment standards (being suitable for the material that test piece surface smoothings such as ferrous materials, inorganic materials, plastic cement do not absorb water) antibacterial experiment is carried out in above-mentioned cold rolling test piece.According to the square test piece that 50mm is made in cold rolling test piece of experiment standard, test piece is air-dry with alcohol sterilization back in the sterilization glass dish, simultaneously 0.4ml is diluted to 0.2 * 10 in the NB of 500 times of dilutions (Nutrient Broth) substratum
6～1.0 * 10
6The test organisms liquid of cfu/ml is inoculated in the test piece, will sterilize and the plastic film through the aseptic 45mm of cutting into four directions is covered in the test piece again, makes test organisms in the test piece surface diffusion, allows bacterium and test piece surface adherence.Then at 35 ℃, in the Constant Temperature Incubators of relative humidity more than 90%, cultivate after the specified time, the substratum that contains sanitising agent with 10ml washes bacterium liquid, after dull and stereotyped (mix and release) dilution method dilution bacterium liquid, in standard agar-agar substratum, cultivate, calculate formed colony number then, to estimate the bacterium number of each test piece, and the bacterium decrement of more not antibiotic processed goods (contrast) and anti-biotic material, carry out anti-microbial property assessment, wherein, bacteriostasis rate must be called with the top greater than 99% antibacterial effect.And experimental strain be selected from intestinal bacteria common in the daily life, streptococcus aureus experimentizes as bacterial classification.
Consult table 3, by the actual experiment result shown in the table 3 as can be known, low nickel stainless steel material of the present invention (being experimental group 1-1,1-2,1-3,2-1,2-2,2-3,3-1,3-2,3-3) reaches 99.999% to colibacillary bacteriostasis rate, and the low-nickel austenitic stainless steel that visible the present invention has solidity to corrosion and germ resistance concurrently has the antimicrobial effect.
[table 3] is to the test result of colibacillary bacteriostasis rate
| The test group | Wash the bacterium number after the inoculation | Bacterium number after 24 hours | Bacteriostasis rate (%) |
| Blank group | ??8.0×10 5 | ??6.7×10 6 | ??--- |
| Control group 1-0 | ??-- | ??5.8×10 6 | ??-- |
| Experimental group 1-1 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 1-2 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 1-3 | ??-- | ??＜10 | ??99.999％ |
| Control group 2-0 | ??-- | ??3.6×10 5 | ??-- |
| Experimental group 2-1 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 2-2 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 2-3 | ??-- | ??＜10 | ??99.999％ |
| Control group 3-0 | ??-- | ??1.8×10 6 | ??-- |
| Experimental group 3-1 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 3-2 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 3-3 | ??-- | ??＜10 | ??99.999％ |
Consult table 4, by the bacteriostasis rate experimental result of table 4 pair streptococcus aureus as can be known the present invention's test film (being experimental group 1-1,1-2,1-3,2-1,2-2,2-3,3-1,3-2,3-3) of having the low-nickel austenitic stainless steel of solidity to corrosion and germ resistance concurrently the bacteriostasis rate of streptococcus aureus is also reached 99.999%, can learn that stainless steel of the present invention has excellent antibacterial effect really.
[table 4] is to the test result of the bacteriostasis rate of streptococcus aureus
| The test group | Wash the bacterium number after the inoculation | Bacterium number after 24 hours | Bacteriostasis rate (%) |
| Blank group | ??8.3×10 5 | ??2.5×10 6 | ??--- |
| Control group 1-0 | ??-- | ??1.3×10 5 | ??-- |
| Experimental group 1-1 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 1-2 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 1-3 | ??-- | ??＜10 | ??99.999％ |
| Control group 2-0 | ??-- | ??1.8×10 6 | ??-- |
| Experimental group 2-1 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 2-2 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 2-3 | ??-- | ??＜10 | ??99.999％ |
| Control group 3-0 | ??-- | ??5.0×10 5 | ??-- |
| Experimental group 3-1 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 3-2 | ??-- | ??＜10 | ??99.999％ |
| Experimental group 3-3 | ??-- | ??＜10 | ??99.999％ |
By above-mentioned explanation and experimental result as can be known, the present invention has the low-nickel austenitic stainless steel of solidity to corrosion and germ resistance concurrently, really can be under the situation of low nickel content, by design to manufacture method and alloying constituent, reach corrosion proof demand by the sensitization experiment, and reach the antimicrobial purpose by separating out copper-rich phase simultaneously, not only can under the prerequisite of saving nickel interpolation cost, have solidity to corrosion close with 304 stainless steels under general environment, and with the antimicrobial effect, the demand that meets existing market has reached purpose of the present invention really.
Claims (3)
1, a kind of low-nickel austenitic stainless steel that has solidity to corrosion and germ resistance concurrently is characterized in that described stainless steel comprises:
The carbon of weight percent between 0.03 to 0.12;
The silicon of weight percent between 0.2 to 1.0;
The manganese of weight percent between 7.5 to 10.5;
The chromium of weight percent between 14.0 to 16.0;
The nickel of weight percent between 1.0 to 5.0;
The nitrogen of weight percent between 0.04 to 0.25;
The copper of weight percent between 2.0 to 5.0;
Other are multiple inevitably micro-in steelmaking process; And
The iron of surplus;
And described low-nickel austenitic stainless steel lives through temperature range at least 850 ℃ to 950 ℃ timeliness thermal treatment, so that the copper-rich phase in the stainless steel is separated out after handling through hot rolling.
2, the low-nickel austenitic stainless steel that has solidity to corrosion and germ resistance concurrently as claimed in claim 1 is characterized in that: a kind of in the described various trace elements is sulphur, and its weight percent is less than 0.01.
3, the low-nickel austenitic stainless steel that has solidity to corrosion and germ resistance concurrently as claimed in claim 1 is characterized in that: a kind of in this various trace elements is phosphorus, and its weight percent is less than 0.06.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386464C (en) * | 2006-07-21 | 2008-05-07 | 内蒙古华业特钢股份有限公司 | Rare earth low-nickel CrMnN stainless steel |
| CN100503871C (en) * | 2007-08-15 | 2009-06-24 | 金雹峰 | Ferroalloy |
| 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 |
| CN113025900A (en) * | 2021-03-02 | 2021-06-25 | 青岛浦友精密金属有限公司 | Low-cost high-strength stainless steel raw material composition |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4769213A (en) * | 1986-08-21 | 1988-09-06 | Crucible Materials Corporation | Age-hardenable stainless steel having improved machinability |
| JPH09249948A (en) * | 1996-03-13 | 1997-09-22 | Nisshin Steel Co Ltd | Stainless steel excellent in antibacterial property and designing property |
| JP4038832B2 (en) * | 1996-08-08 | 2008-01-30 | 住友金属工業株式会社 | Stainless steel material with excellent antibacterial properties and method for producing the same |
| JP2000303152A (en) * | 1999-04-20 | 2000-10-31 | Nisshin Steel Co Ltd | Austenitic stainless steel excellent in antibacterial property and hole expanding workability in secondary working and its production |
| CN1401808A (en) * | 2002-09-13 | 2003-03-12 | 张体宝 | Antibacterial austenite stainless steel |
| TWI247813B (en) * | 2002-10-23 | 2006-01-21 | Yieh United Steel Corp | Austenite stainless steel with low nickel content |
| CN1226440C (en) * | 2002-11-15 | 2005-11-09 | 张体宝 | Antibacterial property improved austenic stainless steel and mfg method thereof |
-
2004
- 2004-05-28 CN CNB2004100472386A patent/CN100354447C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386464C (en) * | 2006-07-21 | 2008-05-07 | 内蒙古华业特钢股份有限公司 | Rare earth low-nickel CrMnN stainless steel |
| CN100503871C (en) * | 2007-08-15 | 2009-06-24 | 金雹峰 | Ferroalloy |
| 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 |
| CN113025900A (en) * | 2021-03-02 | 2021-06-25 | 青岛浦友精密金属有限公司 | Low-cost high-strength stainless steel raw material composition |
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