CN1308477C - Rich granule iron series stainless steel with good hot work ability and antibacterial effect - Google Patents
Rich granule iron series stainless steel with good hot work ability and antibacterial effect Download PDFInfo
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- CN1308477C CN1308477C CNB2003101045622A CN200310104562A CN1308477C CN 1308477 C CN1308477 C CN 1308477C CN B2003101045622 A CNB2003101045622 A CN B2003101045622A CN 200310104562 A CN200310104562 A CN 200310104562A CN 1308477 C CN1308477 C CN 1308477C
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- 239000010935 stainless steel Substances 0.000 title claims abstract description 43
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 43
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 30
- 239000008187 granular material Substances 0.000 title abstract 3
- 150000002505 iron Chemical class 0.000 title abstract 3
- 239000010949 copper Substances 0.000 claims abstract description 34
- 229910052802 copper Inorganic materials 0.000 claims abstract description 32
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- 238000005098 hot rolling Methods 0.000 claims abstract description 8
- 239000011572 manganese Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 32
- 229910001566 austenite Inorganic materials 0.000 claims description 10
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 20
- 239000010959 steel Substances 0.000 abstract description 20
- 239000011651 chromium Substances 0.000 abstract description 8
- 229910052804 chromium Inorganic materials 0.000 abstract description 6
- 238000003723 Smelting Methods 0.000 abstract description 2
- 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 description 2
- 239000011573 trace mineral Substances 0.000 abstract description 2
- 235000013619 trace mineral Nutrition 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 30
- 230000000845 anti-microbial effect Effects 0.000 description 16
- 241000894006 Bacteria Species 0.000 description 15
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 7
- 239000004332 silver Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000003115 biocidal effect Effects 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 241000191967 Staphylococcus aureus Species 0.000 description 4
- 238000011081 inoculation Methods 0.000 description 4
- 238000007669 thermal treatment Methods 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 235000015097 nutrients Nutrition 0.000 description 3
- 238000010587 phase diagram Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 235000016709 nutrition Nutrition 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000012085 test solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UPLPHRJJTCUQAY-WIRWPRASSA-N 2,3-thioepoxy madol Chemical compound C([C@@H]1CC2)[C@@H]3S[C@@H]3C[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@](C)(O)[C@@]2(C)CC1 UPLPHRJJTCUQAY-WIRWPRASSA-N 0.000 description 1
- FRXSZNDVFUDTIR-UHFFFAOYSA-N 6-methoxy-1,2,3,4-tetrahydroquinoline Chemical compound N1CCCC2=CC(OC)=CC=C21 FRXSZNDVFUDTIR-UHFFFAOYSA-N 0.000 description 1
- 241000709661 Enterovirus Species 0.000 description 1
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- 239000011248 coating agent Substances 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000008363 phosphate buffer Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Abstract
The present invention provides rich granule iron series stainless steel which 0.001 to 0.1% of carbon, 0.2 to 1.0% of silicon, 0.001 to 1.0% of manganese, 11.0 to 20.0% of chromium, 0.001 to 0.1% of nitrogen, 1.0 to 3.5% of copper, balanced iron and a plurality of inevitable trace elements in the steel smelting process, wherein the elemental compositions makes the following gamma ph formula have the maximum value of 50, namely gamma ph=420%C-11.5%Si+7%Mn+23%Ni-11.5%Cr-12%Mo+9%Cu-49%Ti-52%Al+470%N+189. A copper rich phase with copper as a main body is separated out through annealing during the hot rolling process, so that the rich granule iron series stainless has the advantages of favorable heat processability and antibacterial effect.
Description
Technical field
The present invention relates to a kind of stainless steel, particularly relating to a kind of ferrite is stainless steel.
Background technology
In recent years stainless steel is because of expanding economy, growth in the living standard and being used in a large number; Yet, be used to make the equipment that the high cleaning demand is arranged when using, for example food machine, kitchen cabinet, medicine equipment etc. then must use the stainless steel that possesses germ resistance to a certain degree, and its demand also day by day increases along with Economic development, growth in the living standard; Recently, more because of the influence of wreaking havoc of transmissible diseases such as enterovirus, SARS, have the made product of stainless steel of antibacterial, more luxuriant is the health care important trend, and therefore, researchdevelopment possesses the stainless steel that germ resistance is arranged, and becomes one of direction of dealer's effort.
Generally make the practice that stainless steel possesses germ resistance to a certain degree, be to adopt sputter, plated film or the mode of coating, select for example metal or its alloys such as silver, copper, chromium, titanium, nickel for use, in stainless steel surface plating skim, is excellent and utilize the germ resistance of these metals than the stainless steel steel, and reach the antimicrobial purpose, for example Japanese kokai publication hei 8-49085 patent, 8-156175 patent have disclosed this type of technique means.
Yet, but this kind,, but should can wear away gradually along with use, peel off by the antimicrobial thin metal layer, and can't keep secular antibiotic effect though can reach the antimicrobial requirement in the short period of time in the mode of stainless steel surface plating antimicrobial thin metal layer.
But can't reach the shortcoming of long-term antibiotic purpose in view of above-mentioned at stainless steel surface plating antimicrobial thin metal layer, but many patents propose directly with the antimicrobial metal, for example in the stainless composition of adding such as copper, silver, to reach the antimicrobial purpose.For example No. 459057 patent of TaiWan, China is that silver is added in the stainless steel, and Japanese kokai publication hei 9-170053 patent etc. then is that copper is added in the stainless steel, and reaches the antimicrobial purpose.
Though above-mentioned patent can be improved metal lining thin layer antimicrobial shortcoming for a long time, but owing to added elements such as not being present in the copper of stainless steel in forming, silver originally, cause in the actual production flow process, to face the problem that to take into account other character, for example add the problem that the hot workability deterioration can appear afterwards in copper.
Therefore, how to study and improve stainless composition, make it not only can reach the antimicrobial effect, still possess simultaneously good hot-work characteristic is arranged, make these antibiotic steel can be applied to actual production manufacturing aspect, be purpose of the present invention.
Summary of the invention
Purpose of the present invention is a stainless steel for a kind of ferrite that has antibiotic and good hot workability simultaneously is provided, and it is had under the prerequisite of antibiotic effect, still has good hot workability simultaneously, does not split and can not produce the limit when hot rolling, influences the production quality.
For achieving the above object, the invention provides a kind of ferrite with good thermal processability and antibacterial effect is stainless steel, comprise the carbon (C) of weight percent between 0.001 to 0.1, the element silicon (Si) of weight percent between 0.2 to 1.0, the manganese element (Mn) of weight percent between 0.001 to 1.0, the chromium element (Cr) of weight percent between 11.0 to 20.0, the nitrogen element (N) of weight percent between 0.001 to 0.1, the copper (Cu) of weight percent between 1.0 to 3.5, equilibrated ferro element (Fe), and most inevitably micro-in steelmaking process; The composition of this each element is to make a following calculating austenite be worth (γ ph mutually; The formula value of γ-phase) is up to 50, this formula is γ ph=420 * %C-11.5 * %Si+7 * %Mn+23 * %Ni-11.5 * %Cr-12 * %Mo+9 * %Cu-49 * %Ti-52 * %Al+470 * %N+189, simultaneously, this ferrite is that stainless steel is to implement temperature range at least at 700 ℃ to 850 ℃ annealing process after the hot rolling processing procedure, and the copper-rich phase in the tissue is separated out.
Description of drawings
Fig. 1 is iron-chromium equilibrium phase diagram, illustrates that the ferrite that the present invention has good thermal processability and an antibacterial effect is stainless research basis for forecasting.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples:
Consult Fig. 1, general ferrite is the phase change of stainless steel in the high-temperature zone, can calculate by iron-chromium equilibrium phase diagram of Fig. 1 and learn, it is 16% o'clock for example at 1000 ℃, the weight percent of chromium, to change ferrite and austenite two-phase coexistent mutually mutually into by ferrite, at this moment, because of biphase intensity differs, roll time-delay and easily crack and result in, cause the inferior of hot workability along two-phase interface.
And, have the antimicrobial effect for making steel, generally be to select for use the interpolation of silver or copper to reach this purpose, and silver does not meet economic benefit because material cost is come highly far beyond copper, so comparatively common to add copper again.Though the interpolation of copper can reach steel antimicrobial effect,, add copper and can make austenite phase ratio increase, and be unfavorable for that high warm-rolling prolongs because copper is the stable element of austenite phase.
Therefore, the invention provides a kind of ferrite with good thermal processability and antibacterial effect is stainless steel, promptly be to see through the composition design, making the ferrite that adds copper is that stainless steel can be a basis with iron-chromium equilibrium phase diagram of Fig. 1, estimate the ratio of austenite phase when the high temperature by formula, make it can have germ resistance and hot workability concurrently.Thus, can draw a kind of ferrite of the present invention and be stainless steel and predict that accurately ferrite is that the calculation formula of stainless austenite phase (γ ph) maximum ratio is γ ph=420 * %C-11.5 * %Si+7 * %Mn+23 * %Ni-11.5 * %Cr-12 * %Mo+9 * %Cu-49 * %Ti-52 * %Al+470 * %N+189 with good thermal processability and antibacterial effect, wherein, %C represents the weight percent of carbon elements (C), %Si represents to contain the weight percent of element silicon (Si), %Mn represents to contain the weight percent of manganese element (Mn), %Ni represents to contain the weight percent of nickel element (Ni), %Cr represents to contain the weight percent of chromium element (Cr), %Mo represents to contain the weight percent of molybdenum element (Mo), %Cu represents to contain the weight percent of copper (Cu), %Ti represents to contain the weight percent of titanium elements (Ti), and %Al represents to contain the weight percent of aluminium element (Al).And, the weight percent of control carbon is between 0.001 and 0.1, the weight percent of element silicon is between 0.2 and 1.0, the weight percent of manganese element is between 0.001 and 1.0, the weight percent of chromium element is between 11.0 and 20.0, the weight percent of nitrogen element is between 0.001 and 0.1, the weight percent of copper is between 1.0 and 3.5, most inevitably micro-in steelmaking process, and equilibrated ferro element, those trace elements comprise molybdenum at least, titanium, aluminium, sulphur (S) less than 150ppm, weight percent is less than phosphorus (P) of 0.06 etc., and control γ ph is up to 50, simultaneously, in smelting process, behind the hot rolling processing procedure between the final finished, the steel that contain above-mentioned composition are implemented the annealing process between 700 ℃ to 850 ℃ at least one time, copper-rich phase can be separated out and finish the present invention, the ferrite that promptly has good thermal processability and antibacterial effect is a stainless steel, not only can borrow above-mentioned composition and γ ph to be worth control mutually makes it have good hot workability, simultaneously, borrow the copper-rich phase of separating out and can reach the antimicrobial effect.
Carbon is the strong stability element of austenite phase, but add weight percent Tai Gaoyi simultaneously the steel solidity to corrosion is reduced, and processibility also can variation between heat, and therefore control is added carbon between 0.001% and 0.1%.Simultaneously, in stainless steel refining process, must carry out deoxidation as reductor with silicon, therefore one predetermined interpolation weight percent must be arranged, but silicone content too Gao Shihui raises aluminium content wherein relatively, it is residual at thing to cause hard to be situated between on the contrary, and unfavorable following process processing procedure, so silicone content control is between 0.2% and 1.0%.
Mainly acting as of chromium is against corrosion, but considers that for raw materials cost therefore the ratio of adding is between 11% and 20% simultaneously.And nitrogen, manganese are the stable element of austenite phase, and therefore Tai Gao or the too low control that all is unfavorable for γ ph control its content respectively between 0.001% to 0.1%, and 0.001% to 1.0%.
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 to have the ferrite of good thermal processability and antibacterial effect be the consideration of stainless steel for antibacterial effect and cost in the present invention, so select between the copper interpolation 1.0% to 3.5% to reach the antimicrobial effect.
As for phosphorus, sulphur etc. is harmful element, and proportion is certainly low better, so limit its weight percent respectively less than 0.06, below 0.015.
The test piece of present embodiment is after the alloy iron raw material is melt into ingot bar, the material of the thick 32mm of the wide 294mm of cut growth 295mm, through process furnace heating, keep temperature after between 1050～1200 ℃ 1 hour, to come out of the stove, prolong the steel band that 7 passages become final thickness 3mm through repeating to roll, finish and roll temperature between 800 ℃～820 ℃, and air cooling handles this test piece to room temperature through annealing and pickling, is so-called hot rolling test piece, the surface properties that can observe this test piece this moment is as the assessment foundation of hot workability.
After in addition this test piece being cold-rolled to the steel band that thickness is 1mm again, promptly bestow antibiotic ageing treatment (700～850 ℃ of temperature, the time is more than at least 4 hours), after pickling, promptly get so-called cold rolling test piece again, implement antibacterial experiment at this test piece, with the germ resistance of assessment material.
The embodiment of antibacterial experiment is that first bacteria is gone into steel system in the bacterium liquid again, through observing the variation of bacterial growth number after a while, as the foundation whether antibacterial effect is arranged, the bacteria process is meant that the iron wire that utilizes front end that small circle ring is arranged gets a little dense bacteria liquid and spread upon on the clean solid nutrient base (when smearing for the second time must with smear direction for the first time be an angle of 90 degrees), getting the liquid nutritional base mixes with the thalline of placing slightly after 24 hours, get the examination bacteria liquid of liquid nutritional base 3ml and 60 μ l placement after 24 hours again, mixed with 50: 1.Place after 2～3 hours, carry out antibacterial tests.
Antibacterial tests be to get two clean glass test tubees 5ml PBS (phosphate buffer soln) that packs into, and also add 5ml PBS at the test tube of inserting test piece.Getting 2～3 hours examination bacterium of 50 μ l placement adds in first glass test tube.Get first glass test tube test solution, 50 μ l adding and be placed with in each test tube of test piece, as experimental group, add in second glass test tube, in contrast group and get first glass test tube test solution, 50 μ l.In experimental group and every test tube of control group, get 50 μ l, evenly spread upon on the solid nutrient base, wherein test tube was placed 37 degree water termostat grooves 24 hours, every test tube of experimental group and control group in the water termostat groove is got 50 μ l again, evenly spread upon on the solid nutrient base, with its be positioned over 37 the degree incubators in 24 hours, observations, the number bacterium is also calculated bacteriostasis rate, bacteriostasis rate must be called with the top greater than 99% antibacterial effect, wherein, bacteriostasis rate=(initial inoculation bacterium number-24 hour after bacterium number) * 100/ initial inoculation bacterium number; And experimental strain be selected from intestinal bacteria common in the daily life, streptococcus aureus experimentizes as bacterial classification.
By the actual experiment result shown in the table one as can be known, the ferrite that the present invention has good thermal processability and antibacterial effect is after stainless test film (i.e. invention steel in the table) imposes the timeliness thermal treatment of differing temps, colibacillary bacteriostasis rate is reached 100%, the general lower ferrite of copper content is the then any bacteriostasis rate of tool hardly of stainless steel (i.e. comparative steel in the table), and to have the ferrite of good thermal processability and antibacterial effect be that stainless steel has the antimicrobial effect in the present invention as can be known.
[table one] is to colibacillary bacteriostasis rate test result
| The test group | Copper content | Thermal treatment temp | Initial inoculation bacterium number | Retain the bacterium number after 24 hours | Bacteriostasis rate |
| The invention steel | 1.56％ | 830℃ | 6.5×10 8 | 0 | 100％ |
| 1.98％ | 700℃ | 7.0×10 8 | 0 | 100％ | |
| 1.98％ | 800℃ | 1.0×10 8 | 0 | 100％ | |
| 2.07％ | 820℃ | 5.2×10 5 | ＜10 | 100％ | |
| 2.46％ | 700℃ | 3.9×10 8 | 0 | 100％ | |
| 2.46％ | 800℃ | 5.9×10 7 | 0 | 100％ | |
| 3.04％ | 800℃ | 6.0×10 5 | 0 | 100％ | |
| Comparative steel | 0.02％ | 820℃ | 3.2×10 8 | 1.4×10 7 | - |
| 0.1％ | 820℃ | 1.5×10 5 | 7.2×10 4 | - |
Test by the bacteriostasis rate of table two pair streptococcus aureus again, to have the ferrite of good thermal processability and antibacterial effect be after stainless test film (i.e. table in invention steel) imposes the timeliness thermal treatment of differing temps in the present invention as can be known, bacteriostasis rate to streptococcus aureus also reaches 100%, and the general lower ferrite of copper content is that stainless steel (i.e. comparative steel in the table) bacteriostasis rate is almost nil, can learn that the ferrite that the present invention has good thermal processability and an antibacterial effect is that stainless steel has excellent antibacterial effect really.
[table two] is to the bacteriostasis rate test result of streptococcus aureus
| The test group | Copper content | Thermal treatment temp | Initial inoculation bacterium number | Retain the bacterium number after 24 hours | Bacteriostasis rate |
| The invention steel | 1.56％ | 830℃ | 2.3×10 8 | 0 | 100％ |
| 1.98％ | 700℃ | 1.6×10 8 | 0 | 100％ | |
| 1.98％ | 800℃ | 4.4×10 8 | 0 | 100％ | |
| 2.07％ | 820℃ | 3.6×10 5 | 0 | 100％ | |
| 3.04％ | 700℃ | 1.5×10 10 | 0 | 100％ | |
| 3.04％ | 800℃ | 2.0×10 7 | 0 | 100％ | |
| Comparative steel | 0.02％ | 820℃ | 1.5×10 10 | 1.7×10 9 | - |
Consult table three, the ferrite that the present invention has good thermal processability and antibacterial effect is that stainless steel is under the prerequisite with excellent antibacterial effect, because γ ph value all limits and is less than or equal to 50, it is residual in the hot-rolled temperature interval to reduce austenite, and delays observation test piece surface and the boundless generation of defects of splitting in hot rolling; Other γ ph value is that stainless steel (i.e. comparative steel in the table) then produces the limit and splits defective greater than 50 ferrite, two can learn after comparing, the ferrite that the present invention has an antibacterial effect be stainless steel having under the excellent antibacterial effect prerequisite, have good hot workability really.
[table three] hot rolling delay test result
In sum, the ferrite that the present invention has good thermal processability and antibacterial effect is that stainless steel is certain calculation formula according to experimental study correction γ ph, study the weight percent of elements such as main component in the stainless steel such as carbon, silicon, manganese, chromium, copper, nitrogen simultaneously in great detail, reach and limit γ ph value simultaneously, and can possess excellent germ resistance and hot workability are arranged, so can reach purpose of the present invention really.
Claims (3)
1. the ferrite with good thermal processability and antibacterial effect is a stainless steel, it is characterized in that:
This ferrite is that stainless steel comprises:
The carbon of weight percent between 0.001 to 0.1;
The element silicon of weight percent between 0.2 to 1.0;
The manganese element of weight percent between 0.001 to 1.0;
The chromium element of weight percent between 11.0 to 20.0;
The nitrogen element of weight percent between 0.001 to 0.1;
The copper of weight percent between 3.04 to 3.5;
The equilibrated ferro element; And
Most inevitably micro-in iron manufacturing process;
The composition of this each element is that the formula value that makes following calculating austenite be worth mutually is up to 50, and this formula is
γ ph=420 * %C-11.5 * %Si+7 * %Mn+23 * %Ni-11.5 * %Cr-12 * %Mo+9 * %Cu-49 * %Ti-52 * %Al+470 * %N+189, and this ferrite is that stainless steel is implemented temperature range at least greater than 800 ℃ to 850 ℃ annealing process after the hot rolling processing procedure, and copper-rich phase is separated out.
2. the ferrite that has good thermal processability and antibacterial effect according to claim 1 is a stainless steel, it is characterized in that: this ferrite is that stainless steel also comprises the element sulphur less than 150ppm.
3. the ferrite that has good thermal processability and antibacterial effect according to claim 1 is a stainless steel, it is characterized in that: this ferrite is that stainless steel also comprises weight percent less than 0.06 phosphoric.
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| CNB2003101045622A CN1308477C (en) | 2003-10-31 | 2003-10-31 | Rich granule iron series stainless steel with good hot work ability and antibacterial effect |
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| CNB2003101045622A CN1308477C (en) | 2003-10-31 | 2003-10-31 | Rich granule iron series stainless steel with good hot work ability and antibacterial effect |
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| CN1611627A CN1611627A (en) | 2005-05-04 |
| CN1308477C true CN1308477C (en) | 2007-04-04 |
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| CN100547102C (en) * | 2007-04-20 | 2009-10-07 | 宝山钢铁股份有限公司 | A kind of biphase antibiotic stainless steel and manufacture method thereof |
| CN100497710C (en) * | 2007-11-21 | 2009-06-10 | 江阴康瑞不锈钢制品有限公司 | High intensity corrosion resistant antibiotic type stainless steel wire for brassieres and manufacturing method thereof |
| CN102337483B (en) * | 2010-07-28 | 2013-10-09 | 中国科学院金属研究所 | Antibacterial stainless steel, its heat treatment method and application |
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| US4450006A (en) * | 1980-10-22 | 1984-05-22 | Norioki Uyehara | Martensitic stainless steel |
| JPS61166953A (en) * | 1985-01-18 | 1986-07-28 | Nippon Kokan Kk <Nkk> | Austenitic stainless steel having superior strength at high temperature |
| EP0478790A1 (en) * | 1990-03-24 | 1992-04-08 | Nisshin Steel Co., Ltd. | Heat-resistant ferritic stainless steel excellent in low-temperature toughness, weldability and heat resistance |
| JPH0499128A (en) * | 1990-08-03 | 1992-03-31 | Nippon Steel Corp | Production of martensitic stainless steel line pipe |
| CN1158363A (en) * | 1995-12-15 | 1997-09-03 | 日新制钢株式会社 | Stainless steel improved in anti-microbial property and manufacturing thereof |
| US6096411A (en) * | 1997-03-14 | 2000-08-01 | Matsushita Electric Industrial Co., Ltd. | Conductive paste composition for via hole filling and printed circuit board using the same |
| CN1415649A (en) * | 2001-10-29 | 2003-05-07 | 金鼎联合科技纤维股份有限公司 | Granular composite material containing metal fiber and its mfg. method |
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| CN1611627A (en) | 2005-05-04 |
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