CN109182903A - The preparation method of thin-walled anti-bacteria stainless steel pipe and anti-bacteria stainless steel - Google Patents
The preparation method of thin-walled anti-bacteria stainless steel pipe and anti-bacteria stainless steel Download PDFInfo
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- CN109182903A CN109182903A CN201811103994.4A CN201811103994A CN109182903A CN 109182903 A CN109182903 A CN 109182903A CN 201811103994 A CN201811103994 A CN 201811103994A CN 109182903 A CN109182903 A CN 109182903A
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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
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- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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- 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
- C22C33/06—Making ferrous alloys by melting using master alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
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Abstract
The present invention relates to the preparation methods of a kind of thin-walled anti-bacteria stainless steel pipe and anti-bacteria stainless steel, belong to steel material technical field.A kind of thin-walled anti-bacteria stainless steel pipe, including outer stainless steel layer and anti-bacteria stainless steel layer, outer stainless steel layer are set to the outer surface of anti-bacteria stainless steel layer, and anti-bacteria stainless steel layer is made by anti-bacteria stainless steel.By mass percentage, antibacterial stainless layer includes C:0.04~0.07%, Cu:1.5~4%, Si:0.4~1.0%, Mn:1~2%, Cr:17~19%, Ni:8~11%, N:0.01~0.3%, Ce:0.01~0.5%, Y:0.01~0.3%, the Fe and impurity element of surplus.The stainless steel tube has good anti-microbial property, antioxygenic property and mechanical strength, suitable for preparing the relatively thin steel pipe of tube wall.
Description
Technical field
The present invention relates to steel material technical fields, and in particular to a kind of thin-walled anti-bacteria stainless steel pipe and anti-bacteria stainless steel
Preparation method.
Background technique
Suitable element with antibacterial effect is exactly added, so that final production goes out in anti-bacteria stainless steel in stainless steel
Steel there is good anti-microbial property, the antibacterials of the alloying elements such as copper, silver, zinc is mainly utilized in the generation of anti-microbial property
Effect.Anti-bacteria stainless steel has superior performance compared with common stainless steel.It can satisfy the theory that the mankind pursue health, mention
Rise quality of the life.With common stainless steel the drinking water pipeline same service life, with mechanical performance in the case where, reduce water in bacterium deposit
Live time and content, because corroding caused by microorganism under the conditions of reduction is certain, riser tubing service life.Anti-bacteria stainless steel is being cured
Traditional stainless steel is gradually substituted with oral cavity field, provide with people's living standard and health is pursued, in addition industrial development
In links to water pollution and microbial growth, it is very wide that anti-bacteria stainless steel in drinking water pipeline drinks prospect.
With the development of society, proposing various requirement to anti-bacteria stainless steel.Novel anti-bacteria stainless steel is for its development
Have the function of positive.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of thin-walled anti-bacteria stainless steel pipe, the stainless steels
Pipe has good anti-microbial property, antioxygenic property and mechanical strength, suitable for preparing the relatively thin steel pipe of tube wall.
Another object of the present invention is to provide a kind of preparation methods of anti-bacteria stainless steel, and the preparation method is easy to operate,
Controllability is strong, easy to industrialized production.
The present invention solves its technical problem and adopts the following technical solutions to realize.
The present invention proposes a kind of thin-walled anti-bacteria stainless steel pipe, including outer stainless steel layer and anti-bacteria stainless steel layer, outer stainless steel
Layer is set to the outer surface of anti-bacteria stainless steel layer, and anti-bacteria stainless steel layer is made by anti-bacteria stainless steel.
By mass percentage, anti-bacteria stainless steel includes C:0.04~0.07%, and Cu:1.5~4%, Si:0.4~
1.0%, Mn:1~2%, Cr:17~19%, Ni:8~11%, N:0.01~0.3%, Ce:0.01~0.5%, Y:0.01~
0.3%, the Fe and impurity element of surplus.
The present invention proposes a kind of preparation method of anti-bacteria stainless steel, comprising: will be made not after raw material mixed smelting according to the ratio
Become rusty steel just base, then is dissolved, disperse processing.
The beneficial effect comprise that
The present invention is made an addition in stainless steel material by mixing elemental copper with cerium, yttrium, can utilize copper ion, ruthenium ion
Enhance the antibacterial characteristics and inoxidizability of stainless steel material with the synergistic effect of cerium ion, and cerium and rare-earth yttrium facilitate
Improve the mechanical property of stainless steel with C, Si, Mn, Cr, Ni and N collective effect, to obtain a kind of antibacterial and mechanical property is excellent
Different anti-bacteria stainless steel material.The stainless steel tube has good anti-microbial property, antioxygenic property and mechanical strength, is suitable for system
The standby relatively thin steel pipe of tube wall.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, letter will be made to attached drawing needed in the embodiment below
It singly introduces, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as to the present invention
The restriction of protection scope.
Fig. 1 is the structural schematic diagram of the thin-walled anti-bacteria stainless steel pipeline of the embodiment of the present invention.
Icon: 1- thin-walled anti-bacteria stainless steel pipe；The outer stainless steel layer of 2-；3- anti-bacteria stainless steel layer.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Have below to the preparation method of a kind of thin-walled anti-bacteria stainless steel pipe of the embodiment of the present invention and anti-bacteria stainless steel
Body explanation.
Fig. 1 is please referred to, the embodiment of the invention provides a kind of thin-walled anti-bacteria stainless steel pipe 1, including outer stainless steel layer 2 and anti-
Bacterium stainless steel layer 3, outer stainless steel layer 2 are set to the outer surface of anti-bacteria stainless steel layer 3, and anti-bacteria stainless steel layer 3 is by anti-bacteria stainless steel
It is made.Anti-bacteria stainless steel layer 3 with a thickness of 10~60 μm.Preferably, thickness can for 20 μm, 35 μm, 40 μm, 50 μm,
55μm.The thickness of thin-walled anti-bacteria stainless steel pipe 1 in the present invention is thinner than general stainless steel tube, and anti-bacteria stainless steel layer 3
Anti-microbial property and mechanical property requirements for internal layer, therefore to antibacterial stainless steel layer 3 want high.
Specifically, by mass percentage, anti-bacteria stainless steel includes C:0.04~0.07%, Cu:1.5~4%, Si:0.4
~1.0%, Mn:1~2%, Cr:17~19%, Ni:8~11%, N:0.01~0.3%, Ce:0.01~0.5%, Y:0.01
~0.3%, the Fe and impurity element of surplus.
In above-mentioned chemical component, carbon is strong austenite former, and it is suitable needed for stainless steel effectively to assign
The component of tensile strength and creep rupture strength.However, the toughness for making alloy is reduced and may be broken if carbon content is excessively high
Bad weldability can also reduce corrosion resistance.For this purpose, carbon content is limited to 0.04~0.07% in the present invention.Carbon content can be
0.045%, 0.065%.Preferably, carbon content can be 0.05~0.06%, wherein carbon content can be 0.055%.
Due to the higher cost of silver, the present invention does not use silver, uses copper.Copper has antibiotic property and corrosion resistance, wear-resisting
Property and cold-formed property.The content of copper is 1.5~4% in stainless steel of the present invention, and to guarantee under heat treatment condition, copper is in steel
Size is precipitated in nanoscale copper-rich phase in kind even dispersion.The content of copper can be 1.6%, 1.7%, 1.8%, 3.7%.It is preferred that
Ground, the content of copper are 2~3.5%.Wherein, the content of copper can be 2.4%, 2.6%, 2.9%, 3.1%, 3.3%, 3.4%.
Silicon is conducive to improve the corrosion resistance and inoxidizability of stainless steel, but excessive silicon will destroy the welding performance of alloy,
If being chronically exposed to the ductility and toughness that σ phase easy to form under hot environment destroys alloy.For this purpose, silicone content is limited to
0.4~1.0%, silicone content can for 0.62%, 0.65%, 0.68%, 0.71%, 0.77%, 0.79%, 0.81%,
0.82%, 0.84%, 0.88%, 0.90%, 0.94%, 0.97%.Preferably, silicone content can be 0.4~0.6%, wherein
Silicone content can be 0.42%, 0.47%, 0.49%, 0.51%, 0.53%, 0.58%.
Manganese energy stable austenite, and can increase solubility of the nitrogen in austenite, manganese content is excessively high can impair it is anti-oxidant
Property and love carry out, low-alloyed creep limit is dropped.For this purpose, manganese content is 1~2% in the present invention.Manganese content can for 1.2%,
1.3%, 1.1%, 1.4%.Preferably, manganese content is 1.5~2%.Wherein, manganese content can for 1.6%, 1.7%, 1.8%,
1.9%.
Chromium can improve the inoxidizability and corrosion resistance of stainless steel, and the fine and close oxidation containing chromium can be formed in the medium of oxidation
Film, energy tissue metal matrix continue to destroy.However if chromium content is excessively high, for stable austenite and inhibit the formation of σ phase
Just need to increase the content of nickel, based on these considerations, chromium content is limited in 17~19%.Chromium content can for 16.5%, 17%,
17.5%, 21%, 18.5%, 19%, 19.5%.
Nickel is the element for forming and stablizing austenite strongly and expanding austenite phase field, under specific chromium content, is increased
Nickel content inhibits oxide growth rate and increases the trend for forming continuous oxidation layers of chrome.Therefore, nickel content preferably 8~
11%.Nickel content can be 8.2%, 8.5%, 8.7%, 8.9%, 10.5%, 10.8%.Preferably, nickel content be 9~
10%.Wherein, nickel content can be 9.5%, 9.3%, 9.7%, 9.8%.
The corrosion resistance of steel can be improved in nitrogen, can also save nickel.The content of nitrogen is 0.01~0.3% in the present invention.Nitrogen contains
Amount can be 0.05%, 0.27%, 0.08%, 0.12%, 0.19%, 0.21%.Preferably, nitrogen content is 0.15~0.25.
Wherein, nitrogen content can be 0.17%, 0.18%, 0.2%, 0.22%, 0.24%.
Microelement can not only cleaning molten steel, and the solidified structure of steel can be refined, change the property of field trash, form and
Distribution, to improve the properties of steel.As surface active element, grain boundary decision activation energy can increase, can hinder crystalline substance
Boundary's sliding, and increase the surface energy of grain-boundary crack, to improving, creep rupture strength is largely effective.
Rare earth element has anti-microbial property, and rare-earth yttrium is added and cerium improves the anti-microbial property of stainless steel.Yttrium can simultaneously
The binding ability of oxidation film consistency and film and matrix is significantly improved, and then improves antioxygenic property.Rare-earth yttrium content is
0.01~0.3%, it can be 0.03%, 0.08%, 0.12%, 0.15%, 0.18%.Preferably, rare-earth yttrium content be 0.2~
0.3%.Wherein, yttrium content can be 0.23%, 0.25%, 0.28%.
Cerium is precipitated with ionic condition, can further promote the anti-microbial property of anti-bacteria stainless steel material.Cerium can also improve
The antioxidative effect of the inoxidizability of anti-bacteria stainless steel material, Ce elements is more than the elements such as silicon, aluminium, titanium, it can improve steel
Mobility, reduce nonmetal inclusion, keep structure of steel fine and close, pure, the addition of cerium improves the impact flexibility of anti-bacteria stainless steel,
Especially low-temperature impact toughness, each diversity of improvement, and it is able to maintain the fine grain of anti-bacteria stainless steel, improve intensity.The present invention is dilute
Native cerium content is 0.01~0.5%.It can be 0.02%, 0.04%, 0.07%, 0.011%, 0.15%, 0.2%, 0.25%.
Preferably, rare earth cerium content is 0.3~0.5%.Wherein, cerium content can for 0.35%, 0.32%, 0.34%, 0.4%,
0.45%, 0.48%.
The present invention is made an addition in stainless steel material by mixing elemental copper with cerium, yttrium, can utilize copper ion, ruthenium ion
Enhance the antibacterial characteristics and inoxidizability of stainless steel material with the synergistic effect of cerium ion, and cerium and rare-earth yttrium facilitate
The mechanical property for improving stainless steel, to obtain the anti-bacteria stainless steel material of a kind of antibacterial and excellent in mechanical performance.
Further, in the present invention preferably embodiment, stainless steel tube contains a small amount of sulphur and phosphorus, needs to illustrate
It is S≤0.03%, P≤0.035%.The more mechanical behavior under high temperature that will affect stainless steel tube of the content of sulphur and phosphorus and high temperature are anti-
Oxidability, therefore its content need to be controlled.
The embodiment of the invention provides the preparation methods of above-mentioned anti-bacteria stainless steel, comprising: according to the ratio by raw material mixed smelting
After be made stainless steel just base, then be dissolved, disperse processing.
Specifically, the present invention is with steel scrap, copper and iron, ferrosilicon, manganese iron, ferrochrome, ferronickel, nitrogen iron, rare earth yttrium iron and rare earth ferrocerium
Alloy is raw material, according to each composition by weight percent of thin-walled anti-bacteria stainless steel pipe, calculates and each raw material of weighing, is matched
Material.
Steel scrap is heated to fusing in 1300~1350 DEG C of electric furnace, copper and iron, ferrosilicon, manganese iron are sequentially added after dissolved clarification,
Mixed under conditions of 1350~1400 DEG C it is melting down, and use aluminium wire deoxidation.Ferrochrome, ferronickel, nitrogen iron are sequentially added, is warming up to
Liquid steel temperature reaches 1460~1520 DEG C, uses aluminium wire deoxidation again, and after slagging-off, molten steel and rare earth yttrium iron and rare earth ferrocerium are closed
Gold mixing.Standing to the temperature of mixing molten steel is 1480~1520 DEG C, then mixing molten steel is poured into casting-up and prepares stainless steel
First base.The embodiment of the present invention uses aluminium wire deoxidation, and aluminium wire deoxidation is the general technology of the art, in other of the invention
In embodiment, can using other method of deoxidation, the present invention to it without limitation.
After the first base of obtained stainless steel is made, base at the beginning of stainless steel is dissolved 15~25min under conditions of 1120~1180 DEG C,
It dissolves in Cu, Y and Ce with super saturated solid solution state in the organism material of stainless steel billet, then cools to room temperature.It will be by solid solution
Just base is heated to 660~700 DEG C of 1~1.5h of heat preservation to the stainless steel of reason, cooling.Make antibacterial phase ε-Cu, Y, Ce solid solution Dispersed precipitate
In the austenite organism material of stainless steel billet, to obtain the stainless steel material with preferable anti-microbial property.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
Present embodiments provide a kind of anti-bacteria stainless steel and preparation method thereof, comprising:
The chemical component (weight percent) of the present embodiment heat resistance stainless steel tube: 0.04%C, 1.5%Cu, 0.4%
Si, 1%Mn, 17%Cr, 8%Ni, 0.08%N, 0.1%Ce, 0.1%Y, S≤0.03%, P≤0.035%, remaining for Fe and
Inevitable impurity element.
It calculates and raw material needed for above-mentioned melting of weighing: steel scrap, copper and iron, manganese iron, ferrosilicon, ferrochrome, ferronickel, nitrogen iron, dilute
Native ferrocerium and rare earth yttrium iron carry out ingredient.
Steel scrap is heated to fusing in 1300 DEG C of electric furnace, copper and iron, ferrosilicon, manganese iron are sequentially added after dissolved clarification, 1350
Mixed under conditions of DEG C it is melting down, and use aluminium wire deoxidation.Ferrochrome, ferronickel, nitrogen iron are sequentially added, liquid steel temperature is warming up to and reaches
1460 DEG C, aluminium wire deoxidation is used again, after slagging-off, molten steel is mixed with rare earth yttrium iron and rare earth cerium-iron alloy.It stands to mixing
The temperature of molten steel is 1480 DEG C, then mixing molten steel is poured into base at the beginning of casting-up prepares stainless steel.
After the first base of obtained stainless steel is made, base at the beginning of stainless steel is dissolved 15min under conditions of 1120 DEG C, is subsequently cooled to
Room temperature.Base at the beginning of stainless steel Jing Guo solution treatment is heated to 660 DEG C of heat preservation 1h, it is cooling.
Embodiment 2
Present embodiments provide a kind of anti-bacteria stainless steel and preparation method thereof, comprising:
The chemical component (weight percent) of the present embodiment heat resistance stainless steel tube: 0.05%C, 4%Cu, 0.5%Si,
1.5%Mn, 18%Cr, 10%Ni, 0.2%N, 0.3%Ce, 0.25%Y, S≤0.03%, P≤0.035%, remaining for Fe and
Inevitable impurity element.
It calculates and raw material needed for above-mentioned melting of weighing: steel scrap, copper and iron, manganese iron, ferrosilicon, ferrochrome, ferronickel, nitrogen iron, dilute
Native ferrocerium and rare earth yttrium iron carry out ingredient.
Steel scrap is heated to fusing in 1330 DEG C of electric furnace, copper and iron, ferrosilicon, manganese iron are sequentially added after dissolved clarification, 1380
Mixed under conditions of DEG C it is melting down, and use aluminium wire deoxidation.Ferrochrome, ferronickel, nitrogen iron are sequentially added, liquid steel temperature is warming up to and reaches
1500 DEG C, aluminium wire deoxidation is used again, after slagging-off, molten steel is mixed with rare earth yttrium iron and rare earth cerium-iron alloy.It stands to mixing
The temperature of molten steel is 1500 DEG C, then mixing molten steel is poured into base at the beginning of casting-up prepares stainless steel.
After the first base of obtained stainless steel is made, base at the beginning of stainless steel is dissolved 20min under conditions of 1150 DEG C, is subsequently cooled to
Room temperature.Base at the beginning of stainless steel Jing Guo solution treatment is heated to 680 DEG C of heat preservation 1h, it is cooling.
Embodiment 3
Present embodiments provide a kind of anti-bacteria stainless steel and preparation method thereof, comprising:
The chemical component (weight percent) of the present embodiment heat resistance stainless steel tube: 0.07%C, 3%Cu, 1%Si,
2%Mn, 19%Cr, 11%Ni, 0.2%N, 0.4%Ce, 0.3%Y, S≤0.03%, P≤0.035%, remaining is Fe and can not
The impurity element avoided.
It calculates and raw material needed for above-mentioned melting of weighing: steel scrap, copper and iron, manganese iron, ferrosilicon, ferrochrome, ferronickel, nitrogen iron, dilute
Native ferrocerium and rare earth yttrium iron carry out ingredient.
Steel scrap is heated to fusing in 1330 DEG C of electric furnace, copper and iron, ferrosilicon, manganese iron are sequentially added after dissolved clarification, 1380
Mixed under conditions of DEG C it is melting down, and use aluminium wire deoxidation.Ferrochrome, ferronickel, nitrogen iron are sequentially added, liquid steel temperature is warming up to and reaches
1500 DEG C, aluminium wire deoxidation is used again, after slagging-off, molten steel is mixed with rare earth yttrium iron and rare earth cerium-iron alloy.It stands to mixing
The temperature of molten steel is 1500 DEG C, then mixing molten steel is poured into base at the beginning of casting-up prepares stainless steel.
After the first base of obtained stainless steel is made, base at the beginning of stainless steel is dissolved 20min under conditions of 1150 DEG C, is subsequently cooled to
Room temperature.Base at the beginning of stainless steel Jing Guo solution treatment is heated to 700 DEG C of heat preservation 1.5h, it is cooling.
Embodiment 4
Present embodiments provide a kind of anti-bacteria stainless steel and preparation method thereof, comprising:
The chemical component (weight percent) of the present embodiment heat resistance stainless steel tube: 0.05%C, 2%Cu, 1%Si,
2%Mn, 18%Cr, 9%Ni, 0.3%N, 0.3%Ce, 0.3%Y, S≤0.03%, P≤0.035%, remaining is Fe and can not
The impurity element avoided.
It calculates and raw material needed for above-mentioned melting of weighing: steel scrap, copper and iron, manganese iron, ferrosilicon, ferrochrome, ferronickel, nitrogen iron, dilute
Native ferrocerium and rare earth yttrium iron carry out ingredient.
Steel scrap is heated to fusing in 1350 DEG C of electric furnace, copper and iron, ferrosilicon, manganese iron are sequentially added after dissolved clarification, 1400
Mixed under conditions of DEG C it is melting down, and use aluminium wire deoxidation.Ferrochrome, ferronickel, nitrogen iron are sequentially added, liquid steel temperature is warming up to and reaches
1520 DEG C, aluminium wire deoxidation is used again, after slagging-off, molten steel is mixed with rare earth yttrium iron and rare earth cerium-iron alloy.It stands to mixing
The temperature of molten steel is 1520 DEG C, then mixing molten steel is poured into base at the beginning of casting-up prepares stainless steel.
After the first base of obtained stainless steel is made, base at the beginning of stainless steel is dissolved 25min under conditions of 1180 DEG C, is subsequently cooled to
Room temperature.Base at the beginning of stainless steel Jing Guo solution treatment is heated to 700 DEG C of heat preservation 1.5h, it is cooling.
Comparative example 1
This comparative example provides a kind of stainless steel and preparation method thereof, comprising:
The chemical component (weight percent) of the present embodiment heat resistance stainless steel tube: 0.04%C, 0.4%Si, 1%Mn,
17%Cr, 8%Ni, 0.1%N, S≤0.03%, P≤0.035%, remaining is Fe and inevitable impurity element.
Calculate and raw material needed for above-mentioned melting of weighing: steel scrap, manganese iron, ferrosilicon, ferrochrome, ferronickel, nitrogen iron are matched
Material.
Steel scrap is heated to fusing in 1300 DEG C of electric furnace, ferrosilicon, manganese iron are sequentially added after dissolved clarification, in 1350 DEG C of item
Mixed under part it is melting down, and use aluminium wire deoxidation.Ferrochrome, ferronickel, nitrogen iron are sequentially added, liquid steel temperature is warming up to and reaches 1460
℃.Mixing molten steel is poured into base at the beginning of casting-up prepares stainless steel after standing.
Comparative example 2
This comparative example provides a kind of stainless steel and preparation method thereof, comprising:
The chemical component (weight percent) of the present embodiment heat resistance stainless steel tube: 0.05%C, 4%Cu, 0.5%Si,
1.5%Mn, 18%Cr, 10%Ni, 0.3%N, S≤0.03%, P≤0.035%, remaining is Fe and inevitable impurity member
Element.
It calculates and raw material needed for above-mentioned melting of weighing: steel scrap, copper and iron, manganese iron, ferrosilicon, ferrochrome, ferronickel, nitrogen iron, into
Row ingredient.
Steel scrap is heated to fusing in 1350 DEG C of electric furnace, copper and iron, ferrosilicon, manganese iron are sequentially added after dissolved clarification, 1400
Mixed under conditions of DEG C it is melting down, and use aluminium wire deoxidation.Ferrochrome, ferronickel, nitrogen iron are sequentially added, liquid steel temperature is warming up to and reaches
1520 DEG C, again use aluminium wire deoxidation, after slagging-off stand to mixing molten steel, then will mixing molten steel pour into casting-up prepare it is stainless
The first base of steel.
After the first base of obtained stainless steel is made, base at the beginning of stainless steel is dissolved 25min under conditions of 1180 DEG C, is subsequently cooled to
Room temperature.Base at the beginning of stainless steel Jing Guo solution treatment is heated to 700 DEG C of heat preservation 1.5h, it is cooling.
Test example
The stainless steel prepared respectively to Examples 1 to 4, comparative example 1~2 carries out mechanical property, antioxygenic property, corrosion resistance
It can be with bacteriostasis property test.Bacteriostatic test according to GB/T21510-2008 " nano inorganic material anti-microbial property detection method " into
Row.Corrosion resistance test is carried out according to stainless steel ferric trichloride pitting corrosion test method (GB/T 17897-1999).Test result
It is as follows:
1 test result of table
By test result it is found that the tensile strength of anti-bacteria stainless steel, elongation, anti-oxidant that Examples 1 to 4 provides
Property, corrosion resistance and anti-microbial property are better than comparative example 1~2.Illustrate the preparation method of anti-bacteria stainless steel provided by the invention compared with
To be scientific and reasonable, antibacterial can be made and the preferable stainless steel of mechanical property, anti-bacteria stainless steel obtained can be used for preparing thin
Wall anti-bacteria stainless steel.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of thin-walled anti-bacteria stainless steel pipe, which is characterized in that described outer stainless including outer stainless steel layer and anti-bacteria stainless steel layer
Steel layer is set to the outer surface of the anti-bacteria stainless steel layer, and the anti-bacteria stainless steel layer is made by anti-bacteria stainless steel；
By mass percentage, the anti-bacteria stainless steel includes C:0.04~0.07%, and Cu:1.5~4%, Si:0.4~
1.0%, Mn:1~2%, Cr:17~19%, Ni:8~11%, N:0.01~0.3%, Ce:0.01~0.5%, Y:0.01~
0.3%, the Fe and impurity element of surplus.
2. thin-walled anti-bacteria stainless steel pipe according to claim 1, which is characterized in that by mass percentage, the C is
0.05~0.06%, the Cu are 2~3.5%, and the Si is 0.4~0.6%, and the Mn is 1.5~2%, and the Cr is 17
~19%, the Ni be 9~10%, the N be 0.15~0.25%, the Ce be 0.3~0.5%, the Y be 0.2~
0.3%.
3. thin-walled anti-bacteria stainless steel pipe according to claim 1, which is characterized in that by mass percentage, the antibacterial
Stainless steel further include: S≤0.03%, P≤0.035%.
4. thin-walled anti-bacteria stainless steel pipe according to claim 1, which is characterized in that the anti-bacteria stainless steel layer with a thickness of
10~60 μm.
5. a kind of preparation method of anti-bacteria stainless steel as described in any one of claims 1 to 3 characterized by comprising by matching
Base at the beginning of than stainless steel will be made after raw material mixed smelting, then be dissolved, disperse processing.
6. the preparation method of anti-bacteria stainless steel according to claim 5, which is characterized in that the preparation of the first base of the stainless steel
Method includes:
Weighing steel scrap, copper and iron, ferrosilicon, manganese iron, ferrochrome, ferronickel, nitrogen iron, rare earth yttrium iron and rare earth cerium-iron alloy according to the ratio；
By the scrap heating fusing after, with the copper and iron, the ferrosilicon, the manganese iron it is melting down after, then with ferrochrome, the nickel
Iron, nitrogen iron mixing, then mixed with the rare earth yttrium iron and the rare earth cerium-iron alloy, mixing molten steel is poured into casting after standing
Type prepares the stainless steel just base.
7. the preparation method of anti-bacteria stainless steel according to claim 6, which is characterized in that by the steel scrap 1300~
Fusing, the item after dissolved clarification with the copper and iron, the ferrosilicon, the manganese iron at 1350~1400 DEG C are heated in 1350 DEG C of electric furnace
It is mixed under part, after, deoxidation melting down after molten steel, with the ferrochrome, the ferronickel, the nitrogen iron under conditions of 1460~1520 DEG C
Mixing, after deoxidation, slagging-off, molten steel is mixed with the rare earth yttrium iron and the rare earth cerium-iron alloy.
8. the preparation method of anti-bacteria stainless steel according to claim 6, which is characterized in that stand to the mixing molten steel
Temperature is 1480~1520 DEG C, then the mixing molten steel is poured into the casting-up and is shaped.
9. the preparation method of anti-bacteria stainless steel according to claim 5, which is characterized in that the method for solution treatment includes:
After the first base of the stainless steel is made, base at the beginning of the stainless steel is dissolved 15~25min under conditions of 1120~1180 DEG C, then
It is cooled to room temperature.
10. the preparation method of anti-bacteria stainless steel according to claim 5, which is characterized in that dispersion-processed method includes:
Base at the beginning of the stainless steel Jing Guo solution treatment is heated to 660~700 DEG C of 1~1.5h of heat preservation, it is cooling.
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| CN113201684A (en) * | 2021-03-15 | 2021-08-03 | 宁波市华涛不锈钢管材有限公司 | Antibacterial thin-wall stainless steel pipe and preparation method thereof |
| CN113229775A (en) * | 2021-05-18 | 2021-08-10 | 田发 | Cystoscope catheter for urology department and using 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 |
| CN115574177A (en) * | 2022-11-18 | 2023-01-06 | 太原科技大学 | Antibacterial stainless steel bent pipe |
| CN116676523A (en) * | 2023-07-12 | 2023-09-01 | 河北恩泉环境工程有限公司 | Antibacterial rare earth stainless steel pipe and pickling equipment thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113201684A (en) * | 2021-03-15 | 2021-08-03 | 宁波市华涛不锈钢管材有限公司 | Antibacterial thin-wall stainless steel pipe and preparation method thereof |
| CN113229775A (en) * | 2021-05-18 | 2021-08-10 | 田发 | Cystoscope catheter for urology department and using 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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