CN111702165A - Metal powder, feeding and preparation process for preparing antibacterial stainless steel wearing product - Google Patents
Metal powder, feeding and preparation process for preparing antibacterial stainless steel wearing product Download PDFInfo
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- CN111702165A CN111702165A CN202010544131.1A CN202010544131A CN111702165A CN 111702165 A CN111702165 A CN 111702165A CN 202010544131 A CN202010544131 A CN 202010544131A CN 111702165 A CN111702165 A CN 111702165A
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 65
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 55
- 239000010935 stainless steel Substances 0.000 title claims abstract description 55
- 239000000843 powder Substances 0.000 title claims abstract description 44
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 38
- 239000002184 metal Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 39
- 239000007924 injection Substances 0.000 claims abstract description 39
- 239000010949 copper Substances 0.000 claims abstract description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims description 11
- 230000032683 aging Effects 0.000 claims description 10
- 238000005238 degreasing Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 5
- 229910001566 austenite Inorganic materials 0.000 claims description 5
- 238000002161 passivation Methods 0.000 claims description 5
- 239000006104 solid solution Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000001376 precipitating effect Effects 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000003746 surface roughness Effects 0.000 claims description 2
- 238000007517 polishing process Methods 0.000 claims 1
- 230000001954 sterilising effect Effects 0.000 abstract description 5
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 8
- 210000004027 cell Anatomy 0.000 description 7
- 241000894006 Bacteria Species 0.000 description 5
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 239000012300 argon atmosphere Substances 0.000 description 3
- 230000001580 bacterial effect Effects 0.000 description 3
- 238000000280 densification Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 241000588724 Escherichia coli Species 0.000 description 2
- 241000191967 Staphylococcus aureus Species 0.000 description 2
- 230000000845 anti-microbial effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000013068 control sample Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005551 mechanical alloying Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
Classifications
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- B22F1/0003—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- 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
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention relates to a metal powder, feeding and preparation process for preparing an antibacterial stainless steel wearing product, wherein the metal powder comprises the following components in percentage by mass: c: less than or equal to 0.03; si: 0.4-0.6; mn: 0.4-0.8; s: less than or equal to 0.02; p: less than or equal to 0.02; n: less than or equal to 0.02; cr: 17-19; ni: 7.5-8.5; cu: 3.5-4.5; cu: 1 to 5 percent; the balance being Fe. Wherein the preparation process comprises S1, powder preparation; s2, preparing feed; s3, injection: adding the feed into an injection machine, and injecting the feed into an internal cavity of an injection mold by the injection machine to form an injection blank; s4, sintering: sintering the injection blank to form a sintered blank; s5, heat treatment: and carrying out heat treatment on the sintered blank to precipitate a copper-rich phase. According to the invention, the copper element is added into the stainless steel powder, so that the product has the sterilization characteristic through the copper element, and meanwhile, the copper element is precipitated in the form of a second phase, so that the hardness and the strength of the product can be increased, and the surface scratch resistance is increased.
Description
Technical Field
The invention relates to a metal powder, feeding and preparation process for preparing an antibacterial stainless steel wearing product.
Background
The traditional antibacterial stainless steel separates out a certain volume fraction of copper-rich or silver-rich precipitated phase in the high-temperature time-effect process, and when the copper-rich/silver-rich phase is contacted with bacteria, a trace amount of copper ions can be released, so that the cell walls of the bacteria are damaged, and the bacteria die. The traditional stainless steel preparation method has the problems of high technical difficulty, complex smelting process, difficulty in batch production, low product design freedom degree and precision and the like.
In recent years, smart wearable products have been rapidly developed under the concept of 5G. Most products are in direct contact with the skin, if the antibacterial ability is poor, a large number of bacteria can be bred to cause harm to the health of a human body, and the development of intelligent wearing products with the antibacterial ability is very necessary.
The main problems in the preparation of the current three main types of antibacterial stainless steel are as follows: (1) the surface coating antibacterial stainless steel has good antibacterial performance, but has high requirements on production equipment and production technology, and meanwhile, the antibacterial layer on the surface is easy to fall off in the using process, so that the antibacterial property of the stainless steel can be greatly reduced. (2) The antibacterial property of the composite antibacterial stainless steel lasts for a long time and is strong. But also the mass production is difficult to realize due to higher requirements on production equipment and production technology, and the application range is only in the cutter, so that the cutter is difficult to be widely put into production and used. (3) Although the antibacterial property and the wear resistance of the alloy type antibacterial stainless steel are superior to those of other kinds of antibacterial stainless steel, the production process added with antibacterial metal elements such as copper, silver and the like is complex, and the short-flow production by directly utilizing the stainless steel is difficult. Meanwhile, the antibacterial phase is difficult to be dissolved in the matrix in a solid manner to achieve a good antibacterial effect, and is also a great problem faced by antibacterial stainless steel.
Disclosure of Invention
A first object of the present invention is to provide a metal powder for producing antibacterial stainless steel wearing articles, which imparts bactericidal properties to the articles produced therefrom by adding copper element.
The technical mode for realizing the first object of the invention is as follows: the metal powder for preparing the antibacterial stainless steel wearing product comprises the following components in percentage by mass: c: less than or equal to 0.03; si: 0.4-0.6; mn: 0.4-0.8; s: less than or equal to 0.02; p: less than or equal to 0.02; n: less than or equal to 0.02; cr: 17-19; ni: 7.5-8.5; cu: 3.5-4.5; cu: 1 to 5 percent; the balance being Fe.
The metal powder is prepared in a prealloy atomization mode and/or a mechanical alloy stirring mode.
The chemical component Cu is added in the form of one or more than 2 of pure copper powder and intermediate compounds of copper.
A second object of the present invention is to provide a feed material that can combine the above metal powder with powder injection molding.
The technical scheme for realizing the second purpose of the invention is as follows: the feed for preparing the antibacterial stainless steel wearing product comprises the metal powder and the binder for preparing the antibacterial stainless steel wearing product, wherein the ratio of the metal powder to the binder for preparing the antibacterial stainless steel wearing product is 9: 1.
The third purpose of the invention is to provide a preparation process for preparing the antibacterial stainless steel wearing product, which can effectively improve the yield and the quality stability of the antibacterial stainless steel wearing product.
The technical scheme for realizing the third purpose of the invention is as follows: the preparation process for preparing the antibacterial stainless steel wearing product comprises the following steps:
s1, powder preparation: preparing the metal powder for preparing the antibacterial stainless steel wearing product;
s2, feed preparation: preparing the feed for preparing the antibacterial stainless steel wearing product;
s3, injection: adding the feed into an injection machine, and injecting the feed into an internal cavity of an injection mold by the injection machine to form an injection blank;
s4, degreasing: degreasing the injection blank to form a degreased blank;
s5, sintering: sintering the degreased blank to form a sintered blank;
s6, heat treatment: and carrying out heat treatment on the sintered blank to precipitate a copper-rich phase.
S7, performing surface polishing treatment on the product subjected to the step S6, and then forming a layer of passivation film on the surface of the product through PVD.
In the step S1, the metal powder is prepared by prealloying atomization and/or mechanical alloying stirring.
In the step S6, the sintered blank is subjected to solution treatment at 1020-1050 ℃ for 0.5-1h, and is cooled to room temperature by water, so that Ga element can be completely dissolved in an austenite matrix to form a supersaturated solid solution containing Cu; and then carrying out aging treatment at 550-680 ℃ for 3-6h, cooling the obtained product to room temperature in air, and precipitating the Cu element in a supersaturated state in a form of a second phase by the aging treatment.
The reduction of the surface roughness after the polishing treatment is not higher than 0.1 mm.
The invention has the positive effects that: (1) according to the invention, the copper element is added into the stainless steel powder, so that the product has the sterilization characteristic through the copper element, and meanwhile, the copper element is precipitated in the form of a second phase, so that the hardness and the strength of the product can be increased, and the surface scratch resistance is increased.
(2) According to the invention, the metal powder can enable the antibacterial elements to be mixed more uniformly in a prealloying atomization mode.
(3) The proportion of the metal powder and the binder in the invention ensures that the feed has better fluidity, higher sintered density and good dimensional stability.
Detailed Description
(example 1)
The metal powder for preparing the antibacterial stainless steel wearing product comprises the following components in percentage by mass: c: less than or equal to 0.03; si: 0.4-0.6; mn: 0.4-0.8; s: less than or equal to 0.02; p: less than or equal to 0.02; n: less than or equal to 0.02; cr: 17-19; ni: 7.5-8.5; cu: 3; the balance being Fe.
The feed for preparing the antibacterial stainless steel wearing product comprises the metal powder and the binder, wherein the ratio of the metal powder to the binder is 9: 1.
The preparation process for preparing the antibacterial stainless steel wearing product comprises the following steps:
s1, powder preparation: preparing the metal powder; wherein pure copper powder is added to the stainless steel in an atomized form;
s2, feed preparation: preparing the feed for preparing the antibacterial stainless steel wearing product;
s3, injection: adding the feed into an injection machine, and injecting the feed into an internal cavity of an injection mold by the injection machine to form an injection blank;
s4, degreasing: degreasing the injection blank to form a degreased blank;
s5, sintering: sintering the injection blank for 3 hours at 1350 ℃ in argon atmosphere to carry out densification forming to form a sintered blank;
s6, heat treatment: carrying out solution treatment on the sintered blank at 1020-1050 ℃ for 0.5-1h, cooling the sintered blank with water to room temperature to enable Ga element to be completely dissolved in an austenite matrix to form a supersaturated solid solution containing Cu, then carrying out aging treatment at 550-680 ℃ for 3-6h, and cooling the sintered blank with air to room temperature, wherein the aging treatment can enable the Cu element in a supersaturated state to be precipitated in a form of a second phase;
s7, performing surface polishing treatment on the product subjected to the step S6, and then forming a layer of passivation film on the surface of the product through PVD.
(example 2)
The metal powder for preparing the antibacterial stainless steel wearing product comprises the following components in percentage by mass: c: less than or equal to 0.03; si: 0.4-0.6; mn: 0.4-0.8; s: less than or equal to 0.02; p: less than or equal to 0.02; n: less than or equal to 0.02; cr: 17-19; ni: 7.5-8.5; cu: 4; the balance being Fe.
The feed for preparing the antibacterial stainless steel wearing product comprises the metal powder and the binder, wherein the ratio of the metal powder to the binder is 9: 1.
The preparation process for preparing the antibacterial stainless steel wearing product comprises the following steps:
s1, powder preparation: preparing the metal powder; wherein pure copper powder is added to the stainless steel in an atomized form;
s2, feed preparation: preparing the feed for preparing the antibacterial stainless steel wearing product;
s3, injection: adding the feed into an injection machine, and injecting the feed into an internal cavity of an injection mold by the injection machine to form an injection blank;
s4, degreasing: degreasing the injection blank to form a degreased blank;
s5, sintering: sintering the injection blank for 3 hours at 1350 ℃ in argon atmosphere to carry out densification forming to form a sintered blank;
s6, heat treatment: carrying out solution treatment on the sintered blank at 1020-1050 ℃ for 0.5-1h, cooling the sintered blank with water to room temperature to enable Ga element to be completely dissolved in an austenite matrix to form a supersaturated solid solution containing Cu, then carrying out aging treatment at 550-680 ℃ for 3-6h, and cooling the sintered blank with air to room temperature, wherein the aging treatment can enable the Cu element in a supersaturated state to be precipitated in a form of a second phase;
s7, performing surface polishing treatment on the product subjected to the step S6, and then forming a layer of passivation film on the surface of the product through PVD.
(example 3)
The metal powder for preparing the antibacterial stainless steel wearing product comprises the following chemical components in percentage by mass: c: less than or equal to 0.03; si: 0.4-0.6; mn: 0.4-0.8; s: less than or equal to 0.02; p: less than or equal to 0.02; n: less than or equal to 0.02; cr: 17-19; ni: 7.5-8.5, Cu: 5; the balance being Fe.
The feed for preparing the antibacterial stainless steel wearing product comprises the metal powder and the binder, wherein the ratio of the metal powder to the binder is 9: 1.
The preparation process for preparing the antibacterial stainless steel wearing product comprises the following steps:
s1, powder preparation: preparing the metal powder; wherein pure copper powder is added to the stainless steel in an atomized form;
s2, feed preparation: preparing the feed for preparing the antibacterial stainless steel wearing product;
s3, injection: adding the feed into an injection machine, and injecting the feed into an internal cavity of an injection mold by the injection machine to form an injection blank;
s4, degreasing: degreasing the injection blank to form a degreased blank;
s5, sintering: sintering the injection blank for 3 hours at 1350 ℃ in argon atmosphere to carry out densification forming to form a sintered blank;
s6, heat treatment: carrying out solution treatment on the sintered blank at 1020-1050 ℃ for 0.5-1h, cooling the sintered blank with water to room temperature to enable Ga element to be completely dissolved in an austenite matrix to form a supersaturated solid solution containing Cu, then carrying out aging treatment at 550-680 ℃ for 3-6h, and cooling the sintered blank with air to room temperature, wherein the aging treatment can enable the Cu element in a supersaturated state to be precipitated in a form of a second phase;
s7, performing surface polishing treatment on the product subjected to the step S5, and then forming a layer of passivation film on the surface of the product through PVD.
Comparative example
In the comparative example, the metal powder comprises the following chemical components in percentage by mass: c: less than or equal to 0.03; si: 0.4-0.6; mn: 0.4-0.8; s: less than or equal to 0.02; p: less than or equal to 0.02; n: less than or equal to 0.02; cr: 17-19; ni: 7.5-8.5; the balance being Fe.
According to the relevant standard regulations of JIS Z2801 & ltantimicrobial processing product & lt & gt, antimicrobial test method & ltantimicrobial effect & gt & lt 2000 & gt, GB/T2591-2003 & lt antibacterial performance test method & ltantimicrobial plastic & lt & gt, antimicrobial effect & lt & gt, etc., the sterilization rate of the component metals shown in the table I after the component metals act on common infectious bacteria (such as escherichia coli and staphylococcus aureus) is quantitatively tested. The calculation formula of the sterilization rate is as follows: the sterilization ratio (%) [ (viable cell count of control sample-viable cell count of strongly antibacterial austenitic stainless steel)/viable cell count of control sample ] × 100%, viable cell count of control sample is viable cell count after bacterial culture on a common 30 austenitic stainless steel sample, and viable cell count of strongly antibacterial austenitic stainless steel is viable cell count after bacterial culture on a strongly antibacterial austenitic stainless steel after heat treatment.
TABLE-antimicrobial test results
| Bacterial strain | Example 1 | Example 2 | Example 3 | Control group |
| Escherichia coli | 97.8％ | 99.2％ | 99.5％ | 0 |
| Staphylococcus aureus (CGS) | 96.5％ | 99％ | 99.1％ | 0 |
The antibacterial results show that the peak value is reached when the Cu content is added to 4%, and the comparison with the results of a control group shows that the examples added with the copper element have antibacterial performance.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The metal powder for preparing the antibacterial stainless steel wearing product is characterized in that: the composite material comprises the following components in percentage by mass: c: less than or equal to 0.03; si: 0.4-0.6; mn: 0.4-0.8; s: less than or equal to 0.02; p: less than or equal to 0.02; n: less than or equal to 0.02; cr: 17-19; ni: 7.5-8.5; cu: 3.5-4.5; cu: 1 to 5 percent; the balance being Fe.
2. The metal powder for producing antibacterial stainless steel wearing articles according to claim 1, characterized in that: prepared in a prealloying atomization mode and/or a mechanical alloy stirring mode.
3. The metal powder for producing antibacterial stainless steel wearing articles according to claim 1, characterized in that: the chemical component Cu is added in the form of one or more than 2 of pure copper powder and intermediate compounds of copper.
4. The feed for preparing the antibacterial stainless steel wearing product is characterized in that: the antibacterial stainless steel wearing product comprises the metal powder and the binder for preparing the antibacterial stainless steel wearing product according to claim 1, wherein the ratio of the metal powder to the binder for preparing the antibacterial stainless steel wearing product is 9: 1.
5. The preparation process for preparing the antibacterial stainless steel wearing product is characterized by comprising the following steps of:
s1, powder preparation: preparing the metal powder for preparing the antibacterial stainless steel wearing article according to claim 1;
s2, feed preparation: preparing a feed for preparing the antibacterial stainless steel wearing product according to claim 2;
s3, injection: adding the feed into an injection machine, and injecting the feed into an internal cavity of an injection mold by the injection machine to form an injection blank;
s4, degreasing: degreasing the injection blank to form a degreased blank;
s5, sintering: sintering the degreased blank to form a sintered blank;
s6, heat treatment: and carrying out heat treatment on the sintered blank to precipitate a copper-rich phase.
6. The process according to claim 5, wherein the step of preparing the antibacterial stainless steel wearing article comprises the following steps: further comprising step S7: the product subjected to the step S6 is subjected to a surface polishing process, and then a passivation film is formed on the surface of the product by PVD.
7. The process according to claim 5, wherein the step of preparing the antibacterial stainless steel wearing article comprises the following steps: in the step S1, the metal powder is prepared by a prealloy atomization method and/or a mechanical alloy stirring method.
8. The process according to claim 5, wherein the step of preparing the antibacterial stainless steel wearing article comprises the following steps: step S6, carrying out solution treatment on the sintered blank at 1020-1050 ℃ for 0.5-1h, and cooling the sintered blank to room temperature by water, so that Ga element can be completely dissolved in an austenite matrix to form a supersaturated solid solution containing Cu; and then carrying out aging treatment at 550-680 ℃ for 3-6h, cooling the obtained product to room temperature in air, and precipitating the Cu element in a supersaturated state in a form of a second phase by the aging treatment.
9. The process according to claim 6, wherein the step of preparing the antibacterial stainless steel wearing article comprises the following steps: the reduction of the surface roughness after the polishing treatment is not higher than 0.1 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010544131.1A CN111702165A (en) | 2020-06-15 | 2020-06-15 | Metal powder, feeding and preparation process for preparing antibacterial stainless steel wearing product |
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| CN202010544131.1A CN111702165A (en) | 2020-06-15 | 2020-06-15 | Metal powder, feeding and preparation process for preparing antibacterial stainless steel wearing product |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101657A (en) * | 2021-11-12 | 2022-03-01 | 阳江市天骄家庭用品制造有限公司 | Sterilized stainless steel feeding and cutting tool and preparation method thereof |
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| CN114101657A (en) * | 2021-11-12 | 2022-03-01 | 阳江市天骄家庭用品制造有限公司 | Sterilized stainless steel feeding and cutting tool and preparation method thereof |
| CN114226716A (en) * | 2021-12-24 | 2022-03-25 | 阳江市天骄家庭用品制造有限公司 | Feed for preparing antibacterial stainless steel cutting tool, cutting tool and preparation method thereof |
| CN115283595A (en) * | 2022-08-10 | 2022-11-04 | 阳江职业技术学院 | Martensite antibacterial stainless steel outdoor knife and preparation method thereof |
| CN115533102A (en) * | 2022-09-28 | 2022-12-30 | 歌尔股份有限公司 | Titanium steel composite material part and preparation method thereof |
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