CN112267077A - Medical oxygen stainless steel seamless pipe - Google Patents
Medical oxygen stainless steel seamless pipe Download PDFInfo
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- CN112267077A CN112267077A CN202011174172.2A CN202011174172A CN112267077A CN 112267077 A CN112267077 A CN 112267077A CN 202011174172 A CN202011174172 A CN 202011174172A CN 112267077 A CN112267077 A CN 112267077A
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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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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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
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
- C22C38/007—Ferrous alloys, e.g. steel alloys containing silver
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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
- 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
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
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Abstract
The invention relates to a medical oxygen stainless steel seamless pipe and a preparation method thereof, the medical oxygen stainless steel seamless pipe is made of antibacterial stainless steel, and the antibacterial stainless steel comprises the following elements by mass percent: chromium Cr: 14% -20%; molybdenum Mo: 1.5-4.0%; yttrium Y: 0.1-0.3%; copper Cu: 1.5-4.0%; zinc Zn: 0.6 to 0.8 percent; silver Ag: 0.6 to 0.8 percent; silicon Si: 0.8 to 1.0 percent; c, carbon C: 0.03 to 0.08 percent. The medical oxygen stainless steel seamless pipe provided by the invention can effectively enhance the antibacterial property and the oxidation resistance of the stainless steel material through the synergistic effect of copper and yttrium; the antibacterial property of the stainless steel material can be effectively enhanced through the synergistic effect of the zinc and the silver; silicon is a ferrite forming element and has good effect on improving the oxidation resistance and heat strength of the stainless steel; sulfur can improve the cutting performance of stainless steel; the molybdenum can promote the surface passivation of the stainless steel, and the corrosion resistance and the crevice corrosion resistance of the stainless steel in a non-oxidizing acid environment containing chloride ions can be effectively enhanced.
Description
Technical Field
The invention relates to the technical field of medical oxygen tubes, in particular to a medical oxygen stainless steel seamless tube and a preparation method thereof.
Background
As can be seen everywhere in the oxygen circulation pipelines of hospitals, the oxygen input by the pipelines is generally directly absorbed by patients, so that the sanitary standards of the pipelines have higher requirements, particularly the antibacterial performance of the pipelines, and the antibacterial performance of the existing medical oxygen stainless steel seamless pipes is not ideal. In view of the above, we propose a medical oxygen stainless steel seamless tube and a preparation method thereof.
Disclosure of Invention
In order to make up for the defects, the invention provides a medical oxygen stainless steel seamless tube and a preparation method thereof.
The technical scheme of the invention is as follows:
a medical oxygen stainless steel seamless pipe is made of antibacterial stainless steel, and the antibacterial stainless steel comprises the following elements in percentage by mass:
chromium Cr: 14% -20%;
molybdenum Mo: 1.5% -4.0%;
yttrium Y: 0.1 to 0.3 percent;
copper Cu: 1.5% -4.0%;
zinc Zn: 0.6 to 0.8 percent;
silver Ag: 0.6 to 0.8 percent;
silicon Si: 0.8 to 1.0 percent;
c, carbon C: 0.03% -0.08%;
the balance being Fe and other unavoidable impurities, and the sum of the mass percentages of the above elements being 100%.
As a preferred technical scheme of the invention, the medical oxygen stainless steel seamless tube also comprises the following elements:
s, sulfur: 0.01 to 0.04 percent;
n: 0.01 to 0.3 percent.
The preparation method of the medical oxygen stainless steel seamless pipe comprises the following steps:
s1, blending;
s2, smelting;
s3, casting and forming;
s4, annealing and forging;
and S5, heat treatment.
As a preferred technical scheme of the present invention, the ingredients in S1 are specifically operated as follows: and mixing the components according to the mass percentage of the above element components.
As a preferred technical scheme of the present invention, the smelting in S2 specifically comprises: firstly, adding ingredients except copper into a smelting furnace for melting, adding copper after the ingredients are melted, rapidly heating to obtain a melt, and stirring until the melt is uniform.
As a preferred technical solution of the present invention, the casting and molding in S3 specifically comprises: the mixed molten steel obtained in step S2 is poured into a mold and cast into a shape.
As a preferred embodiment of the present invention, the annealing and forging in S4 specifically includes: slowly heating the steel blank formed by casting to a certain temperature, keeping the heating for a certain time to relax the interior of the metal, and then slowly cooling down.
As a preferred technical solution of the present invention, the heat treatment in S5 specifically includes: solid solution treatment and aging treatment, wherein the specific operation of the solid solution treatment is to carry out solid solution treatment on the steel billet which is cast and formed for 0.5 to 1.0 hour at the temperature of 1000-2000 ℃, and then naturally cool the steel billet to room temperature; the aging treatment is specifically carried out by standing for 1.5-3 hours at the temperature of 450-470 ℃.
As a preferable technical scheme of the invention, the temperature in the smelting process in S2 is controlled at 1680-1700 ℃.
According to the preferable technical scheme of the invention, the heating temperature of the annealing and forging in the S4 is 500-650 ℃, and the heating time is 2-2.5 hours.
Compared with the prior art, the invention has the beneficial effects that:
1. the medical oxygen stainless steel seamless pipe provided by the invention can effectively enhance the antibacterial property and the oxidation resistance of the stainless steel material through the synergistic effect of copper and yttrium;
2. the medical oxygen stainless steel seamless tube provided by the invention can effectively enhance the antibacterial property of the stainless steel material through the synergistic effect of zinc and silver;
3. silicon is added into the medical oxygen stainless steel seamless tube, is a ferrite forming element, and has good effects on improving the oxidation resistance and heat strength of the stainless steel; sulfur can improve the cutting performance of stainless steel;
4. the medical oxygen stainless steel seamless pipe provided by the invention can promote the surface passivation of the stainless steel through molybdenum, and can effectively enhance the corrosion resistance and crevice corrosion resistance of the stainless steel in a non-oxidizing acid environment containing chloride ions.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a medical oxygen stainless steel seamless pipe, which is made of antibacterial stainless steel, wherein the antibacterial stainless steel comprises the following elements in percentage by mass:
chromium Cr: 14 percent;
molybdenum Mo: 1.5 percent;
yttrium Y: 0.1 percent;
copper Cu: 1.5 percent;
zinc Zn: 0.6 percent;
silver Ag: 0.6 percent;
silicon Si: 0.8 percent;
c, carbon C: 0.05 percent;
the balance being Fe and other unavoidable impurities, and the sum of the mass percentages of the above elements being 100%.
In this embodiment, the medical oxygen stainless steel seamless tube further includes the following elements:
s, sulfur: 0.03 percent;
n: 0.01 percent.
The preparation method of the medical oxygen stainless steel seamless pipe comprises the following steps:
s1, blending;
s2, smelting;
s3, casting and forming;
s4, annealing and forging;
and S5, heat treatment.
In this embodiment, the specific operations of the ingredients in S1 are as follows: and mixing the components according to the mass percentage of the above element components.
In this embodiment, the smelting in S2 specifically includes: firstly, adding ingredients except copper into a smelting furnace for melting, adding copper after the ingredients are melted, rapidly heating to obtain a melt, and stirring until the melt is uniform.
In this embodiment, the casting and molding in S3 specifically includes: the mixed molten steel obtained in step S2 is poured into a mold and cast into a shape.
In this embodiment, the annealing and forging in S4 specifically includes: slowly heating the steel blank formed by casting to a certain temperature, keeping the heating for a certain time to relax the interior of the metal, and then slowly cooling down.
In this embodiment, the specific operations of the heat treatment in S5 are as follows: solid solution treatment and aging treatment, wherein the specific operation of the solid solution treatment is to perform solid solution treatment on a cast billet for 0.5 hour at the temperature of 1000 ℃, and then naturally cool the billet to room temperature; the aging treatment was carried out specifically by allowing the mixture to stand at 450 ℃ for 1.5 hours.
In this embodiment, the temperature during the melting in S2 is controlled to 1680 ℃.
In this example, the heating temperature of the annealing and forging in S4 was 500 ℃, and the heating time was 2 hours.
Example 2
The embodiment provides a medical oxygen stainless steel seamless pipe, which is made of antibacterial stainless steel, wherein the antibacterial stainless steel comprises the following elements in percentage by mass:
chromium Cr: 17 percent;
molybdenum Mo: 3.0 percent;
yttrium Y: 0.2 percent;
copper Cu: 3.0 percent;
zinc Zn: 0.7 percent;
silver Ag: 0.7 percent;
silicon Si: 0.9 percent;
c, carbon C: 0.08 percent;
the balance being Fe and other unavoidable impurities, and the sum of the mass percentages of the above elements being 100%.
In this embodiment, the medical oxygen stainless steel seamless tube further includes the following elements:
s, sulfur: 0.03 percent;
n: 0.15 percent.
The preparation method of the medical oxygen stainless steel seamless pipe comprises the following steps:
s1, blending;
s2, smelting;
s3, casting and forming;
s4, annealing and forging;
and S5, heat treatment.
In this embodiment, the specific operations of the ingredients in S1 are as follows: and mixing the components according to the mass percentage of the above element components.
In this embodiment, the smelting in S2 specifically includes: firstly, adding ingredients except copper into a smelting furnace for melting, adding copper after the ingredients are melted, rapidly heating to obtain a melt, and stirring until the melt is uniform.
In this embodiment, the casting and molding in S3 specifically includes: the mixed molten steel obtained in step S2 is poured into a mold and cast into a shape.
In this embodiment, the annealing and forging in S4 specifically includes: slowly heating the steel blank formed by casting to a certain temperature, keeping the heating for a certain time to relax the interior of the metal, and then slowly cooling down.
In this embodiment, the specific operations of the heat treatment in S5 are as follows: solid solution treatment and aging treatment, wherein the specific operation of the solid solution treatment is to perform solid solution treatment on a cast billet for 0.75 hour at the temperature of 1500 ℃, and then naturally cool the billet to room temperature; the aging treatment was carried out specifically by allowing to stand at 460 ℃ for 2.25 hours.
In this embodiment, the temperature during the melting in S2 is controlled to 1690 ℃.
In this example, the heating temperature of the annealing and forging in S4 was 600 ℃, and the heating time was 2.25 hours.
Example 3
The embodiment provides a medical oxygen stainless steel seamless pipe, which is made of antibacterial stainless steel, wherein the antibacterial stainless steel comprises the following elements in percentage by mass:
chromium Cr: 20 percent;
molybdenum Mo: 4.0 percent;
yttrium Y: 0.3 percent;
copper Cu: 4.0 percent;
zinc Zn: 0.8 percent;
silver Ag: 0.8 percent;
silicon Si: 1.0 percent;
c, carbon C: 0.08 percent;
the balance being Fe and other unavoidable impurities, and the sum of the mass percentages of the above elements being 100%.
In this embodiment, the medical oxygen stainless steel seamless tube further includes the following elements:
s, sulfur: 0.03 percent;
n: 0.3 percent.
The preparation method of the medical oxygen stainless steel seamless pipe comprises the following steps:
s1, blending;
s2, smelting;
s3, casting and forming;
s4, annealing and forging;
and S5, heat treatment.
In this embodiment, the specific operations of the ingredients in S1 are as follows: and mixing the components according to the mass percentage of the above element components.
In this embodiment, the smelting in S2 specifically includes: firstly, adding ingredients except copper into a smelting furnace for melting, adding copper after the ingredients are melted, rapidly heating to obtain a melt, and stirring until the melt is uniform.
In this embodiment, the casting and molding in S3 specifically includes: the mixed molten steel obtained in step S2 is poured into a mold and cast into a shape.
In this embodiment, the annealing and forging in S4 specifically includes: slowly heating the steel blank formed by casting to a certain temperature, keeping the heating for a certain time to relax the interior of the metal, and then slowly cooling down.
In this embodiment, the specific operations of the heat treatment in S5 are as follows: solid solution treatment and aging treatment, wherein the specific operation of the solid solution treatment is to perform solid solution treatment on a cast billet for 1.0 hour at the temperature of 2000 ℃, and then naturally cool the billet to room temperature; the aging treatment was carried out by allowing the mixture to stand at 470 ℃ for 3 hours.
In this embodiment, the temperature during the melting in S2 is controlled at 1700 ℃.
In this example, the heating temperature of the annealing and forging in S4 was 650 ℃, and the heating time was 2.5 hours.
Comparative example 1
The present comparative example provides a medical oxygen stainless steel seamless tube made of an antibacterial stainless steel comprising the following elements by mass percent:
chromium Cr: 14 percent;
molybdenum Mo: 1.5 percent;
zinc Zn: 0.6 percent;
silver Ag: 0.6 percent;
silicon Si: 0.8 percent;
c, carbon C: 0.08 percent;
the balance being Fe and other unavoidable impurities, and the sum of the mass percentages of the above elements being 100%.
In this embodiment, the medical oxygen stainless steel seamless tube further includes the following elements:
s, sulfur: 0.015 percent;
n: 0.01 percent.
The preparation method of the medical oxygen stainless steel seamless pipe comprises the following steps:
s1, blending;
s2, smelting;
s3, casting and forming;
s4, annealing and forging;
and S5, heat treatment.
In this embodiment, the specific operations of the ingredients in S1 are as follows: and mixing the components according to the mass percentage of the above element components.
In this embodiment, the smelting in S2 specifically includes: firstly, the ingredients are put into a smelting furnace for melting, the ingredients are quickly heated after being melted to obtain a melt, and the melt is stirred until the melt is uniform.
In this embodiment, the casting and molding in S3 specifically includes: the mixed molten steel obtained in step S2 is poured into a mold and cast into a shape.
In this embodiment, the annealing and forging in S4 specifically includes: slowly heating the steel blank formed by casting to a certain temperature, keeping the heating for a certain time to relax the interior of the metal, and then slowly cooling down.
In this embodiment, the specific operations of the heat treatment in S5 are as follows: solid solution treatment and aging treatment, wherein the specific operation of the solid solution treatment is to perform solid solution treatment on a cast billet for 0.5 hour at the temperature of 1000 ℃, and then naturally cool the billet to room temperature; the aging treatment was carried out specifically by allowing the mixture to stand at 450 ℃ for 1.5 hours.
In this embodiment, the temperature during the melting in S2 is controlled to 1680 ℃.
In this example, the heating temperature of the annealing and forging in S4 was 500 ℃, and the heating time was 2 hours.
Comparative example 2
The present comparative example provides a medical oxygen stainless steel seamless tube made of an antibacterial stainless steel comprising the following elements by mass percent:
chromium Cr: 14 percent;
molybdenum Mo: 1.5 percent;
yttrium Y: 0.1 percent;
copper Cu: 1.5 percent;
silicon Si: 0.8 percent;
c, carbon C: 0.05 percent;
the balance being Fe and other unavoidable impurities, and the sum of the mass percentages of the above elements being 100%.
In this embodiment, the medical oxygen stainless steel seamless tube further includes the following elements:
s, sulfur: 0.015 percent;
n: 0.01 percent.
The preparation method of the medical oxygen stainless steel seamless pipe comprises the following steps:
s1, blending;
s2, smelting;
s3, casting and forming;
s4, annealing and forging;
and S5, heat treatment.
In this embodiment, the specific operations of the ingredients in S1 are as follows: and mixing the components according to the mass percentage of the above element components.
In this embodiment, the smelting in S2 specifically includes: firstly, adding ingredients except copper into a smelting furnace for melting, adding copper after the ingredients are melted, rapidly heating to obtain a melt, and stirring until the melt is uniform.
In this embodiment, the casting and molding in S3 specifically includes: the mixed molten steel obtained in step S2 is poured into a mold and cast into a shape.
In this embodiment, the annealing and forging in S4 specifically includes: slowly heating the steel blank formed by casting to a certain temperature, keeping the heating for a certain time to relax the interior of the metal, and then slowly cooling down.
In this embodiment, the specific operations of the heat treatment in S5 are as follows: solid solution treatment and aging treatment, wherein the specific operation of the solid solution treatment is to perform solid solution treatment on a cast billet for 0.5 hour at the temperature of 1000 ℃, and then naturally cool the billet to room temperature; the aging treatment was carried out specifically by allowing the mixture to stand at 450 ℃ for 1.5 hours.
In this embodiment, the temperature during the melting in S2 is controlled to 1680 ℃.
In this example, the heating temperature of the annealing and forging in S4 was 500 ℃, and the heating time was 2 hours.
Comparative example 3
The present comparative example provides a medical oxygen stainless steel seamless tube made of an antibacterial stainless steel comprising the following elements by mass percent:
chromium Cr: 20 percent;
molybdenum Mo: 4.0 percent;
yttrium Y: 0.05 percent;
copper Cu: 0.8 percent;
zinc Zn: 0.2 percent;
silver Ag: 0.1 percent;
silicon Si: 1.0 percent;
c, carbon C: 0.08 percent;
the balance being Fe and other unavoidable impurities, and the sum of the mass percentages of the above elements being 100%.
In this embodiment, the medical oxygen stainless steel seamless tube further includes the following elements:
s, sulfur: 0.03 percent;
n: 0.3 percent.
The preparation method of the medical oxygen stainless steel seamless pipe comprises the following steps:
s1, blending;
s2, smelting;
s3, casting and forming;
s4, annealing and forging;
and S5, heat treatment.
In this embodiment, the specific operations of the ingredients in S1 are as follows: and mixing the components according to the mass percentage of the above element components.
In this embodiment, the smelting in S2 specifically includes: firstly, adding ingredients except copper into a smelting furnace for melting, adding copper after the ingredients are melted, rapidly heating to obtain a melt, and stirring until the melt is uniform.
In this embodiment, the casting and molding in S3 specifically includes: the mixed molten steel obtained in step S2 is poured into a mold and cast into a shape.
In this embodiment, the annealing and forging in S4 specifically includes: slowly heating the steel blank formed by casting to a certain temperature, keeping the heating for a certain time to relax the interior of the metal, and then slowly cooling down.
In this embodiment, the specific operations of the heat treatment in S5 are as follows: solid solution treatment and aging treatment, wherein the specific operation of the solid solution treatment is to perform solid solution treatment on a cast billet for 1.0 hour at the temperature of 2000 ℃, and then naturally cool the billet to room temperature; the aging treatment was carried out by allowing the mixture to stand at 470 ℃ for 3 hours.
In this embodiment, the temperature during the melting in S2 is controlled at 1700 ℃.
In this example, the heating temperature of the annealing and forging in S4 was 650 ℃, and the heating time was 2.5 hours.
Comparative example 4
The present comparative example provides a medical oxygen stainless steel seamless tube made of an antibacterial stainless steel comprising the following elements by mass percent:
chromium Cr: 20 percent;
molybdenum Mo: 4.0 percent;
yttrium Y: 0.8 percent;
copper Cu: 6.9 percent;
zinc Zn: 2.3 percent;
silver Ag: 2.5 percent;
silicon Si: 1.0 percent;
c, carbon C: 0.1 percent;
the balance being Fe and other unavoidable impurities, and the sum of the mass percentages of the above elements being 100%.
In this embodiment, the medical oxygen stainless steel seamless tube further includes the following elements:
s, sulfur: 0.4 percent;
n: 0.3 percent.
The preparation method of the medical oxygen stainless steel seamless pipe comprises the following steps:
s1, blending;
s2, smelting;
s3, casting and forming;
s4, annealing and forging;
and S5, heat treatment.
In this embodiment, the specific operations of the ingredients in S1 are as follows: and mixing the components according to the mass percentage of the above element components.
In this embodiment, the smelting in S2 specifically includes: firstly, adding ingredients except copper into a smelting furnace for melting, adding copper after the ingredients are melted, rapidly heating to obtain a melt, and stirring until the melt is uniform.
In this embodiment, the casting and molding in S3 specifically includes: the mixed molten steel obtained in step S2 is poured into a mold and cast into a shape.
In this embodiment, the annealing and forging in S4 specifically includes: slowly heating the steel blank formed by casting to a certain temperature, keeping the heating for a certain time to relax the interior of the metal, and then slowly cooling down.
In this embodiment, the specific operations of the heat treatment in S5 are as follows: solid solution treatment and aging treatment, wherein the specific operation of the solid solution treatment is to perform solid solution treatment on a cast billet for 1.0 hour at the temperature of 2000 ℃, and then naturally cool the billet to room temperature; the aging treatment was carried out by allowing the mixture to stand at 470 ℃ for 3 hours.
In this embodiment, the temperature during the melting in S2 is controlled at 1700 ℃.
In this example, the heating temperature of the annealing and forging in S4 was 650 ℃, and the heating time was 2.5 hours.
Comparative example 5
The present comparative example provides a medical oxygen stainless steel seamless tube made of an antibacterial stainless steel comprising the following elements by mass percent:
chromium Cr: 20 percent;
molybdenum Mo: 4.0 percent;
silicon Si: 1.0 percent;
c, carbon C: 0.1 percent;
the balance being Fe and other unavoidable impurities, and the sum of the mass percentages of the above elements being 100%.
In this embodiment, the medical oxygen stainless steel seamless tube further includes the following elements:
s, sulfur: 0.015 percent;
n: 0.3 percent.
The preparation method of the medical oxygen stainless steel seamless pipe comprises the following steps:
s1, blending;
s2, smelting;
s3, casting and forming;
s4, annealing and forging;
and S5, heat treatment.
In this embodiment, the specific operations of the ingredients in S1 are as follows: and mixing the components according to the mass percentage of the above element components.
In this embodiment, the smelting in S2 specifically includes: firstly, the ingredients are put into a smelting furnace for melting, the ingredients are quickly heated after being melted to obtain a melt, and the melt is stirred until the melt is uniform.
In this embodiment, the casting and molding in S3 specifically includes: the mixed molten steel obtained in step S2 is poured into a mold and cast into a shape.
In this embodiment, the annealing and forging in S4 specifically includes: slowly heating the steel blank formed by casting to a certain temperature, keeping the heating for a certain time to relax the interior of the metal, and then slowly cooling down.
In this embodiment, the specific operations of the heat treatment in S5 are as follows: solid solution treatment and aging treatment, wherein the specific operation of the solid solution treatment is to perform solid solution treatment on a cast billet for 1.0 hour at the temperature of 2000 ℃, and then naturally cool the billet to room temperature; the aging treatment was carried out by allowing the mixture to stand at 470 ℃ for 3 hours.
In this embodiment, the temperature during the melting in S2 is controlled at 1700 ℃.
In this example, the heating temperature of the annealing and forging in S4 was 650 ℃, and the heating time was 2.5 hours.
Experimental tests were carried out on the medical oxygen stainless steel seamless tubes prepared in examples 1 to 3 and the medical oxygen stainless steel seamless tube prepared in comparative example 1, respectively, and the experimental data were as follows:
from the above experimental data, it can be known that the medical oxygen stainless steel seamless tube added with zinc and silver has a certain antibacterial effect, but is inferior to the medical oxygen stainless steel seamless tube added with yttrium, copper, zinc and silver, so the common action of yttrium, copper, zinc and silver is the key to play a better antibacterial effect.
Experimental tests were carried out on the medical oxygen stainless steel seamless tubes prepared in examples 1 to 3 and the medical oxygen stainless steel seamless tube prepared in comparative example 2, respectively, and the experimental data were as follows:
from the above experimental data, it can be known that the medical oxygen stainless steel seamless tube added with yttrium and copper has a certain antibacterial effect, but is inferior to the medical oxygen stainless steel seamless tube added with yttrium, copper, zinc and silver, so the common action of yttrium, copper, zinc and silver is the key to play a better antibacterial effect.
Experimental tests were carried out on the medical oxygen stainless steel seamless tubes prepared in examples 1 to 3 and the medical oxygen stainless steel seamless tube prepared in comparative example 5, respectively, and the experimental data were as follows:
from the experimental data, it can be known that the medical oxygen stainless steel seamless tube without yttrium, copper, zinc and silver has no antibacterial effect, so that the common action of yttrium, copper, zinc and silver is the key to play a better antibacterial effect.
Experimental tests were carried out on the medical oxygen stainless steel seamless tubes prepared through examples 1 to 3 and the medical oxygen stainless steel seamless tubes prepared through comparative examples 3 and 4, respectively, and the experimental data were as follows:
from the experimental data, the medical oxygen stainless steel seamless tube added with the yttrium, the copper, the zinc and the silver with too low or too high content has a certain antibacterial effect, but is poorer than the medical oxygen stainless steel seamless tube added with the yttrium, the copper, the zinc and the silver with certain content, so the content of the yttrium, the copper, the zinc and the silver also has certain influence on the antibacterial property of the medical oxygen stainless steel seamless tube, and the obvious antibacterial property can be achieved only by adopting the content proportion provided by the invention.
In conclusion, compared with the traditional medical oxygen stainless steel seamless pipe and the corresponding preparation method, the medical oxygen stainless steel seamless pipe and the preparation method thereof provided by the invention have obvious advantages in the aspects of antibacterial property and oxidation resistance.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a medical oxygen stainless steel seamless pipe which characterized in that: the stainless steel seamless pipe is made of antibacterial stainless steel, and the antibacterial stainless steel comprises the following elements in percentage by mass:
chromium Cr: 14% -20%;
molybdenum Mo: 1.5% -4.0%;
yttrium Y: 0.1 to 0.3 percent;
copper Cu: 1.5% -4.0%;
zinc Zn: 0.6 to 0.8 percent;
silver Ag: 0.6 to 0.8 percent;
silicon Si: 0.8 to 1.0 percent;
c, carbon C: 0.03 to 0.08 percent
The balance being Fe and other unavoidable impurities, and the sum of the mass percentages of the above elements being 100%.
2. The medical oxygen stainless steel seamless tube according to claim 1, characterized in that: also included are the following elements:
s, sulfur: 0.01 to 0.04 percent;
n: 0.01 to 0.3 percent.
3. A method of manufacturing a medical oxygen stainless steel seamless tube according to claims 1 to 2, comprising the steps of:
s1, blending;
s2, smelting;
s3, casting and forming;
s4, annealing and forging;
and S5, heat treatment.
4. The method for preparing a medical oxygen stainless steel seamless tube according to claim 3, wherein the specific operations of batching in S1 are as follows: and mixing the components according to the mass percentage of the above element components.
5. The method for preparing a medical oxygen stainless steel seamless tube according to claim 3, wherein the smelting in S2 comprises the following specific operations: firstly, adding ingredients except copper into a smelting furnace for melting, adding copper after the ingredients are melted, rapidly heating to obtain a melt, and stirring until the melt is uniform.
6. The method for manufacturing a medical oxygen stainless steel seamless tube according to claim 3, wherein the casting and molding in S3 comprises the following specific operations: the mixed molten steel obtained in step S2 is poured into a mold and cast into a shape.
7. The method for manufacturing a medical oxygen stainless steel seamless tube according to claim 3, wherein the annealing and forging in S4 comprises the following specific operations: slowly heating the steel blank formed by casting to a certain temperature, keeping the heating for a certain time to relax the interior of the metal, and then slowly cooling down.
8. The method for manufacturing a medical oxygen stainless steel seamless tube according to claim 3, wherein the heat treatment in S5 is specifically performed by: solid solution treatment and aging treatment, wherein the specific operation of the solid solution treatment is to carry out solid solution treatment on the steel billet which is cast and formed for 0.5 to 1.0 hour at the temperature of 1000-2000 ℃, and then naturally cool the steel billet to room temperature; the aging treatment is specifically carried out by standing for 1.5-3 hours at the temperature of 450-470 ℃.
9. The method for preparing a medical oxygen stainless steel seamless tube according to claim 3, wherein the temperature during the melting in S2 is controlled at 1680-1700 ℃.
10. The method for manufacturing a medical oxygen stainless steel seamless tube according to claim 3, wherein the heating temperature of the annealing and forging in S4 is 500 to 650 ℃, and the heating time is 2 to 2.5 hours.
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| CN202011174172.2A CN112267077A (en) | 2020-10-28 | 2020-10-28 | Medical oxygen stainless steel seamless pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000065A (en) * | 2021-10-28 | 2022-02-01 | 江苏春丰轴承有限公司 | Antibacterial stainless steel plate |
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Application publication date: 20210126 |