CN110541130A - Stainless steel for medical instruments and preparation method thereof - Google Patents
Stainless steel for medical instruments and preparation method thereof Download PDFInfo
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous 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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- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/08—Making alloys containing metallic or non-metallic fibres or filaments by contacting the fibres or filaments with molten metal, e.g. by infiltrating the fibres or filaments placed in a mould
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
- C22C49/08—Iron group metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
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Abstract
The invention discloses stainless steel for medical instruments and a preparation method thereof, wherein the stainless steel for the medical instruments comprises the following components in percentage by weight: c: 0.01-0.07, Mn: 0.02-0.06, Cr: 16-18, Ni: 6-8, Mo: 0.4-0.8, V: 0.03-0.0.5, Nb: 0.06-0.1, Al: 0.8-1.2, B + S + F: 0.01-0.02, Ag: 0.14-0.36, Cu: 0.14-0.36, Sn content is the sum of Cu and Ag content, 0.01-0.03 percent of silicone, nano silicate fiber: 0.002-0.004, and the balance of Fe; the stainless steel for the medical instrument is prepared by firstly alloying C, B, Fe, S, C, Fe and Cu, Sn and Ag and then adding other components for melt machining. The invention improves the hardness, the corrosion resistance and the high-temperature oxidation resistance of the medical instrument material.
Description
Technical Field
The invention belongs to the technical field of medical metal materials, and particularly relates to stainless steel for medical instruments and a preparation method thereof.
Background
Medical instruments, which refer to instruments, equipment, appliances, in-vitro diagnostic reagents and calibrators, materials and other similar or related articles directly or indirectly used for human bodies, comprise required computer software; the effect is mainly obtained through physical and other ways, not pharmacological, immunological or metabolic ways, or only plays an auxiliary role though the ways are involved. Stainless steel for medical instruments is required to have excellent properties such as corrosion resistance, oxidation resistance, mechanical properties, toughness, plasticity, weldability, and the like. However, the medical devices currently used in the market have poor mechanical and technological properties, and are not high in high-temperature oxidation resistance and corrosion resistance.
The Chinese patent application document 'stainless steel for medical instruments, a manufacturing method, a heat treatment method and application (publication number: CN 109778079A)' discloses stainless steel for medical instruments and a preparation method thereof, wherein the stainless steel comprises the following chemical components (wt)%: c: 0.01-0.08; si: 0.2-1.0; mn: 0.01-1.00; cr: 16.0-17.5; ni: 6.50-7.50; n: 0.03-0.15; mo: 0.15-1.20; v: 0.02-0.15; nb: 0.02-0.15; al: 0.75-1.50; cu: 0.15-1.20; the balance being Fe. The heat treatment method comprises the following steps: 1) carrying out solution treatment at 1050-1080 ℃ for 2 hours, and slowly cooling to room temperature along with the furnace temperature; 2) cold rolling 60% to obtain ferrite (martensite) + residual austenite; 3) distributing at the temperature of 360 ℃ and 420 ℃; 4) aging treatment at 550 ℃ and 620 ℃; 5) air cooling to room temperature. The invention provides a medical instrument material which has high hardness, high strength, certain plasticity and toughness and excellent corrosion resistance, but the corrosion resistance and the high-temperature oxidation resistance of the medical instrument material prepared by the invention are not satisfactory.
Disclosure of Invention
The invention aims to provide stainless steel for medical instruments, which is added with metal elements of Ag, Cu and Sn in a matching way, a combination of inorganic elements of B + S + F, silicone and nano silicate fibers, and nano hydroxyapatite, and the added components are subjected to high-temperature surface treatment after processing and forming to form a compact protective film, so that the corrosion resistance and high-temperature oxidation resistance of the medical instrument material are improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
The stainless steel for the medical instrument comprises the following components in percentage by weight: c: 0.01-0.07, Mn: 0.02-0.06, Cr: 16-18, Ni: 6-8, Mo: 0.4-0.8, V: 0.03-0.0.5, Nb: 0.06-0.1, Al: 0.8-1.2, B + S + F: 0.01-0.02, Ag: 0.14-0.36, Cu: 0.14-0.36, Sn content is the sum of Cu and Ag content, 0.01-0.03 percent of silicone, nano silicate fiber: 0.002-0.004, and the balance of Fe; the stainless steel for the medical instrument is prepared by firstly alloying C, B, Fe and S, C, Fe, mixing, adding silicone, nano silicate fiber, Cu, Sn and Ag for alloying, mixing and performing melt machining; the stainless steel for medical instruments is cooled in a nitrogen range containing one to three ten-thousandths of oxygen after being mechanically formed.
Further, the stainless steel for the medical instrument comprises the following components in percentage by weight: c: 0.04, Mn: 0.04, Cr: 17, Ni: 7, Mo: 0.6, V: 0.04, Nb: 0.08, Al: 1.0, B + S + F: 0.015, Ag: 0.25, Cu: 0.25, the content of Sn is the sum of the contents of Cu and Ag, 0.02 of silicone, nano silicate fiber: 0.003 and the balance Fe.
Further, the stainless steel for medical instruments is subjected to an air cooling stage in a nitrogen range containing two parts per million of oxygen.
Further, the ratio of B, S and F is 1:1: 1.
The preparation method of the stainless steel for the medical instrument comprises the following steps: mixing 50% of C, B and 50% of Fe, heating to 1200 ℃ for melting to obtain a first molten liquid, mixing S, 50% of C and 50% of Fe, heating to 1200 ℃ for melting to obtain a second molten liquid, mixing Cu, Sn and Ag, heating to 1700 ℃ for melting to obtain a third molten liquid, uniformly mixing the first molten liquid and the second molten liquid at 1200 ℃, cooling to 800 ℃, adding silicone and nano silicate fibers, heating to 1700 ℃, uniformly mixing, preserving heat for 1 hour, adding the third molten liquid, preserving heat for 1 hour, cooling to 1200 ℃, smelting, and casting steel ingots; heating the steel ingot to 1100-1200 ℃, and forging into a forging; rolling the forging into a bar, carrying out solid solution treatment at 1050-1150 ℃, keeping the temperature for 20 minutes, and carrying out air cooling to room temperature; after mechanical processing and forming, the surface is cleaned, heated to 600-800 ℃, and cooled in the nitrogen range containing one ten-thousandth to three ten-thousandth of oxygen, and the medical appliance is prepared.
Further, the heating temperature of the rolling is 1050-.
Further, the surface cleaning comprises ultrasonic cleaning and acid cleaning.
Further, the melting is performed in a vacuum furnace.
The invention has the following beneficial effects:
In the present invention, Cr steel is used as a main component, and C is added to diffuse into the austenite, thereby precipitating fine hard Nb, V carbide or nitride and Ni3Al, further improving hardness and improving material toughness. According to the invention, Ag, Cu and Sn are added simultaneously, so that an Ag, Cu and Sn alloy phase is formed at high temperature, the formed alloy phase is uniformly dispersed, the high-temperature resistant effect is achieved, and the oxidation of surface atoms is avoided. The invention also adds inorganic atom systems of B, S and F, which can be used as an antioxidant to avoid the toughness reduction of the stainless steel caused by the addition of P and N, and improves the high-temperature oxidation resistance and corrosion resistance on the basis of keeping the toughness, element B is enriched on the alloy surface to generate a compact protective film to isolate the direct contact of Fe and oxygen, the addition of S improves the ductility of the alloy, reduces gas and impurities in the alloy, and enables the impurity phase to tend to be spheroidized, the addition of F can obviously improve the corrosion resistance effect, and the addition of the three inorganic atoms can effectively control the surface of the stainless steel not to generate the migration of Fe atoms in the high-temperature process, thereby avoiding the continuous oxidation corrosion of the stainless steel.
The invention can effectively avoid the reduction of mechanical property caused by Si by adding the polysilicone instead of adding Si atoms, the polysilicone can promote the dispersion of the nanometer silicate fiber in the preparation process, and the active silicon atoms can be used as a large amount of heterogeneous cores after decomposition, thus playing the role of deteriorating and refining the main alloy phase, enhancing the corrosion resistance, because the density is less than that of metal, the active silicon atoms can float on the metal surface, so that a large amount of Si-Fe alloy state is exposed on the surface, thus having better corrosion resistance effect, the nanometer silicate fiber is added to enrich on the metal surface along with the polysilicone to form a firm protective layer, meanwhile, the micro-nano structure has good compatibility with the metal, Si-Fe is formed after the polysilicone is decomposed, thus realizing the compatibility of inorganic particles of the nanometer silicate fiber and the metal, and the formed protective layer has higher high temperature resistance, and does not oxidize at high temperatures. According to the invention, after mechanical processing and forming, the stainless steel for the medical apparatus is cooled in a nitrogen range containing one ten-thousandth to three ten-thousandth of oxygen, and through secondary heating and cooling, nano silicate fibers on the surface of the stainless steel can be further fused with Fe, and meanwhile, part of Si and Fe in an Si-Fe alloy phase generated by decomposing the silicone are oxidized in a trace oxygen atmosphere to form an electron blocking layer, so that the corrosion of the Fe inside due to electron migration is avoided.
According to the invention, a large number of experiments show that C, B, Fe alloying, S, C, Fe alloying and Cu, Sn and Ag alloying can have better invention effect, and the supposition is that Fe is modified through modification of different components, and then forms an infinite solid solution through Cu-Sn-Ag, and then forms an intermediate alloy after mixing.
Specifically, according to the invention, 50% of C, B and 50% of Fe are mixed and then heated to 1200 ℃, half of the Fe, the C and the B form a high-boron-carbon alloy, then S, 50% of C and 50% of Fe are mixed and then heated to 1200 ℃ for melting to obtain a high-sulfur-carbon alloy, then the two alloys are fully mixed after mixing, the phenomenon that the distribution is uneven due to excessive concentration of carbon is avoided, the mutual influence of S and B is avoided, the alloy strength is reduced, and after heat preservation, a gap solid solution is formed between alloy phases of the two alloys, so that the structure between the alloy phases is more stable.
Specifically, the first molten liquid and the second molten liquid are uniformly mixed at 1200 ℃, then the mixture is cooled to 800 ℃, then the silicone and the nano silicate fiber are added, the silicone and the nano silicate fiber are added at a lower temperature, the silicone is prevented from being rapidly gasified, so that the silicone can be sufficiently fused with metal in the decomposition process, the nano silicate fiber can easily react with nonmetal such as S and B at an overhigh temperature and can be easily agglomerated, and after the mixture is sufficiently mixed, the temperature is increased to 1700 ℃, so that all nonmetal elements are sufficiently combined with the metal.
Specifically, Cu, Sn, and Ag are mixed and then heated to 1700 ℃ to be melted to obtain a third melt, and an alloy phase composed of trace elements is formed to have the purpose of refining the alloy phase, and a heterogeneous core of trace elements is formed between the alloy phases of the first melt and the second melt to enhance ductility, so that the alloy phase must be added at the end.
Detailed Description
In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.
Example 1
The stainless steel for the medical instrument comprises the following components in percentage by weight: c: 0.04, Mn: 0.04, Cr: 17, Ni: 7, Mo: 0.6, V: 0.04, Nb: 0.08, Al: 1.0, B + S + F: 0.015, Ag: 0.25, Cu: 0.25, the content of Sn is the sum of the contents of Cu and Ag, 0.02 of silicone, nano silicate fiber: 0.003 and the balance Fe. The ratio of B, S and F is 1:1: 1.
The preparation method of the stainless steel for the medical instrument comprises the following steps: mixing 50% of C, B and 50% of Fe, heating to 1200 ℃ for melting to obtain a first molten liquid, mixing S, 50% of C and 50% of Fe, heating to 1200 ℃ for melting to obtain a second molten liquid, mixing Cu, Sn and Ag, heating to 1700 ℃ for melting to obtain a third molten liquid, uniformly mixing the first molten liquid and the second molten liquid at 1200 ℃, cooling to 800 ℃, adding silicone and nano silicate fibers, heating to 1700 ℃, uniformly mixing, preserving heat for 1 hour, adding the third molten liquid, preserving heat for 1 hour, cooling to 1200 ℃, smelting in a vacuum furnace, and casting a steel ingot; heating the steel ingot to 1150 ℃, and forging into a forging; rolling the forgings into bars, wherein the heating temperature of rolling is 1150 ℃, the initial forging temperature is 1130 ℃, the final forging temperature is 880 ℃, solution treatment is carried out, the solution treatment temperature is 1100 ℃, the heat preservation time is 20 minutes, and air cooling is carried out until the room temperature is reached; after mechanical processing and forming, ultrasonic cleaning is carried out, the temperature is heated to 700 ℃, and cooling is carried out in the nitrogen range containing two ten-thousandth of oxygen, thus obtaining the medical appliance.
Example 2
The stainless steel for the medical instrument comprises the following components in percentage by weight: c: 0.01, Mn: 0.06, Cr: 16, Ni: 8, Mo: 0.4, V: 0.0.5, Nb: 0.06, Al: 1.2, B + S + F: 0.01, Ag: 0.36, Cu: 0.14, the content of Sn is the sum of the contents of Cu and Ag, 0.03 percent of silicone, nano silicate fiber: 0.002, and the balance Fe.
The preparation method of the stainless steel for the medical instrument comprises the following steps: mixing 50% of C, B and 50% of Fe, heating to 1200 ℃ for melting to obtain a first molten liquid, mixing S, 50% of C and 50% of Fe, heating to 1200 ℃ for melting to obtain a second molten liquid, mixing Cu, Sn and Ag, heating to 1700 ℃ for melting to obtain a third molten liquid, uniformly mixing the first molten liquid and the second molten liquid at 1200 ℃, cooling to 800 ℃, adding silicone and nano silicate fibers, heating to 1700 ℃, uniformly mixing, preserving heat for 1 hour, adding the third molten liquid, preserving heat for 1 hour, cooling to 1200 ℃, smelting in a vacuum furnace, and casting a steel ingot; heating the steel ingot to 1100 ℃, and forging into a forging; rolling the forgings into bars, wherein the heating temperature of rolling is 1250 ℃, the initial forging temperature is 1030 ℃, the final forging temperature is 880 ℃, solution treatment is carried out, the solution treatment temperature is 1150 ℃, the heat preservation time is 20 minutes, and air cooling is carried out until the room temperature is reached; after mechanical processing and forming, ultrasonic cleaning is carried out, heating is carried out to 600 ℃, and cooling is carried out in the nitrogen range containing three ten-thousandth of oxygen, thus obtaining the medical appliance.
Example 3
The stainless steel for the medical instrument comprises the following components in percentage by weight: c: 0.07, Mn: 0.02, Cr: 18, Ni: 6, Mo: 0.8, V: 0.03, Nb: 0.1, Al: 0.8, B + S + F: 0.02, Ag: 0.14, Cu: 0.36, the content of Sn is the sum of the contents of Cu and Ag, 0.01 of silicone, 0.01 of nano silicate fiber: 0.004, and the balance of Fe.
The preparation method of the stainless steel for the medical instrument comprises the following steps: mixing 50% of C, B and 50% of Fe, heating to 1200 ℃ for melting to obtain a first molten liquid, mixing S, 50% of C and 50% of Fe, heating to 1200 ℃ for melting to obtain a second molten liquid, mixing Cu, Sn and Ag, heating to 1700 ℃ for melting to obtain a third molten liquid, uniformly mixing the first molten liquid and the second molten liquid at 1200 ℃, cooling to 800 ℃, adding silicone and nano silicate fibers, heating to 1700 ℃, uniformly mixing, preserving heat for 1 hour, adding the third molten liquid, preserving heat for 1 hour, cooling to 1200 ℃, smelting in a vacuum furnace, and casting a steel ingot; heating the steel ingot to 1200 ℃, and forging into a forging; rolling the forgings into bars, wherein the heating temperature of rolling is 1050 ℃, the initial forging temperature is 1230 ℃, the final forging temperature is 880 ℃, solution treatment is carried out, the solution treatment temperature is 1050 ℃, the heat preservation time is 20 minutes, and air cooling is carried out until the room temperature is reached; after mechanical processing and forming, ultrasonic cleaning is carried out, heating is carried out to 800 ℃, and cooling is carried out in the nitrogen range containing one ten-thousandth of oxygen, thus obtaining the medical appliance.
Comparative example 1
Substantially the same procedure as in example 1 was conducted except that the raw materials for the stainless steel for medical devices were deficient in Ag, Cu and Sn.
Comparative example 2
Substantially the same procedure as in example 1 was conducted except that Sn was absent from the raw material for producing the stainless steel for medical devices.
Comparative example 3
substantially the same procedure as in example 1 was conducted except that the raw materials for the stainless steel for medical devices were deficient in B, S and F.
Comparative example 4
Substantially the same procedure as in example 1 was conducted except that the raw material for stainless steel for medical devices was deficient in S.
Comparative example 5
The process was substantially the same as in example 1 except that silicone and nano silicate fibers were absent from the raw materials for the production of stainless steel for medical devices.
Comparative example 6
The same procedure as in example 1 was followed, except that silicone was absent from the raw material for the stainless steel for medical devices.
Comparative example 7
The process was substantially the same as in example 1, except that the nano silicate fibers were absent from the raw materials for manufacturing the stainless steel for medical devices.
Comparative example 8
The process was substantially the same as that of example 1, except that the molding was carried out without subsequent treatment.
Comparative example 9
Prepared according to the method of example 1 disclosed in "a stainless steel for medical devices, manufacturing method, heat treatment method and application (publication No. CN 109778079A)".
Comparative example 10
essentially the same procedure as in example 1 was followed except that 50% C, B, 50% Fe was not pre-alloyed but rather C and B were added along with the other components.
Comparative example 11
Basically the same procedure as in example 1 was followed, except that S, 50% C, 50% Fe were not previously alloyed, but S and C were added together with the other components.
Comparative example 12
Basically the same procedure as in example 1 was followed, except that Cu, Sn, Ag were not previously alloyed, but rather Cu, Sn, Ag were added together with the other components.
Comparative example 13
The procedure was essentially the same as in example 1, except that all components were added simultaneously.
Comparative example 14
The procedure was substantially the same as in example 1, except that S, 50% C, 50% Fe were alloyed and then 50% C, B, 50% Fe alloy was added.
Comparative example 15
Basically the same procedure as in example 1 was followed except that different alloys of Cu, Sn and Ag were added between the first melt and the second melt.
Comparative example 16
Basically the same as the preparation process of the example 1, the first molten liquid and the second molten liquid are mixed uniformly at 1200 ℃, and then the silicone and the nano silicate fiber are directly added.
The flat plates obtained in examples 1 to 3 and comparative examples 1 to 16, having a thickness of 1cm, were subjected to a surface hardness test, and immersed in a 5% hydrochloric acid solution at room temperature for 100 hours to observe corrosion, and in air at 200 ℃ for 100 hours to observe high-temperature oxidation resistance.
From the above table, it can be seen that: as can be seen from the data of examples 1-3 and comparative examples 1-9, example 1 is the most preferred example. As can be seen from the data of example 1 and comparative examples 1 to 2, Ag, Cu, Sn improve the hardness and corrosion resistance of stainless steel for medical instruments in the preparation of stainless steel for medical instruments. As can be seen from the data of example 1 and comparative examples 3-4, the inorganic atomic systems of B, S, F improve oxidation resistance and corrosion resistance. As can be seen from the data of example 1 and comparative examples 5 to 7, the hardness, oxidation resistance and corrosion resistance can be effectively improved by adding silicone and nano silicate fiber, and as can be seen from the comparison results of example 1 and comparative example 8, after mechanical processing and forming, ultrasonic cleaning, heating to 700 ℃, and cooling in the nitrogen range containing two ten-thousandth of oxygen can effectively improve the corrosion resistance and high-temperature oxidation resistance. From the data of example 1 and comparative examples 10 to 16, it is understood that the hardness and corrosion resistance of the product are significantly improved by C, B, Fe alloying, S, C, Fe alloying, Cu, Sn, Ag alloying, and then adding the other components together by melting.
The above description should not be taken as limiting the invention to the embodiments, but rather, as will be apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which shall be deemed to fall within the scope of the invention as defined by the claims appended hereto.
Claims (8)
1. The stainless steel for the medical instrument is characterized by comprising the following components in percentage by weight: c: 0.01-0.07, Mn: 0.02-0.06, Cr: 16-18, Ni: 6-8, Mo: 0.4-0.8, V: 0.03-0.0.5, Nb: 0.06-0.1, Al: 0.8-1.2, B + S + F: 0.01-0.02, Ag: 0.14-0.36, Cu: 0.14-0.36, Sn content is the sum of Cu and Ag content, 0.01-0.03 percent of silicone, nano silicate fiber: 0.002-0.004, and the balance of Fe; the stainless steel for the medical instrument is prepared by firstly alloying C, B, Fe and S, C, Fe, mixing, adding silicone, nano silicate fiber, Cu, Sn and Ag for alloying, mixing and performing melt machining; the stainless steel for medical instruments is cooled in a nitrogen range containing one to three ten-thousandths of oxygen after being mechanically formed.
2. The stainless steel for medical instruments according to claim 1, comprising the following components in percentage by weight: c: 0.04, Mn: 0.04, Cr: 17, Ni: 7, Mo: 0.6, V: 0.04, Nb: 0.08, Al: 1.0, B + S + F: 0.015, Ag: 0.25, Cu: 0.25, the content of Sn is the sum of the contents of Cu and Ag, 0.02 of silicone, nano silicate fiber: 0.003 and the balance Fe.
3. The stainless steel for medical instruments according to claim 1, wherein the stainless steel for medical instruments is subjected to an air cooling stage in a nitrogen range containing two parts per million of oxygen.
4. The stainless steel for medical instruments according to claim 1, wherein the ratio of B, S, and F is 1:1: 1.
5. A method for producing the stainless steel for medical devices according to any one of claims 1 to 4, comprising the steps of: mixing 50% of C, B and 50% of Fe, heating to 1200 ℃ for melting to obtain a first molten liquid, mixing S, 50% of C and 50% of Fe, heating to 1200 ℃ for melting to obtain a second molten liquid, mixing Cu, Sn and Ag, heating to 1700 ℃ for melting to obtain a third molten liquid, uniformly mixing the first molten liquid and the second molten liquid at 1200 ℃, cooling to 800 ℃, adding silicone and nano silicate fibers, heating to 1700 ℃, uniformly mixing, preserving heat for 1 hour, adding the third molten liquid, preserving heat for 1 hour, cooling to 1200 ℃, smelting, and casting steel ingots; heating the steel ingot to 1100-1200 ℃, and forging into a forging; rolling the forging into a bar, carrying out solid solution treatment at 1050-1150 ℃, keeping the temperature for 20 minutes, and carrying out air cooling to room temperature; after mechanical processing and forming, the surface is cleaned, heated to 600-800 ℃, and cooled in the nitrogen range containing one ten-thousandth to three ten-thousandth of oxygen, and the medical appliance is prepared.
6. The method for producing a stainless steel for medical instruments according to claim 5, wherein: the heating temperature for rolling is 1050 ℃ and 1250 ℃, the initial forging temperature is 1030 ℃ and 1230 ℃, and the final forging temperature is 880 ℃.
7. The method for preparing stainless steel for medical instruments according to claim 5, wherein the surface cleaning comprises ultrasonic cleaning and acid cleaning.
8. The method for producing the stainless steel for medical instruments according to claim 5, wherein the melting is performed in a vacuum furnace.
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| CN111334714A (en) * | 2020-04-16 | 2020-06-26 | 浙江志达管业有限公司 | Ultralow-temperature stainless steel pipe fitting material and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001355048A (en) * | 2000-04-13 | 2001-12-25 | Nippon Steel Corp | Ferritic free-cutting stainless steel |
| US20030102057A1 (en) * | 2001-10-23 | 2003-06-05 | Short John William | High-strength high-toughness precipitation-hardened steel |
| US20110265920A1 (en) * | 2008-12-09 | 2011-11-03 | Masaharu Hatano | High-purity ferritic stainless steels excellent in corrosion resistance and method of production of same |
| CN104372262A (en) * | 2014-11-10 | 2015-02-25 | 苏州蔻美新材料有限公司 | Stainless steel for medical device and preparation method of stainless steel |
| CN106609341A (en) * | 2015-10-26 | 2017-05-03 | 威尔机械江苏有限公司 | Corrosion resisting stainless steel and production method thereof |
| CN106609336A (en) * | 2015-10-26 | 2017-05-03 | 威尔机械江苏有限公司 | Acid-resistant stainless steel and production method thereof |
-
2019
- 2019-10-22 CN CN201911005778.0A patent/CN110541130A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001355048A (en) * | 2000-04-13 | 2001-12-25 | Nippon Steel Corp | Ferritic free-cutting stainless steel |
| US20030102057A1 (en) * | 2001-10-23 | 2003-06-05 | Short John William | High-strength high-toughness precipitation-hardened steel |
| US20110265920A1 (en) * | 2008-12-09 | 2011-11-03 | Masaharu Hatano | High-purity ferritic stainless steels excellent in corrosion resistance and method of production of same |
| CN104372262A (en) * | 2014-11-10 | 2015-02-25 | 苏州蔻美新材料有限公司 | Stainless steel for medical device and preparation method of stainless steel |
| CN106609341A (en) * | 2015-10-26 | 2017-05-03 | 威尔机械江苏有限公司 | Corrosion resisting stainless steel and production method thereof |
| CN106609336A (en) * | 2015-10-26 | 2017-05-03 | 威尔机械江苏有限公司 | Acid-resistant stainless steel and production method thereof |
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