CN117488292A - Film coating agent for drawing metal product and production method and application thereof - Google Patents
Film coating agent for drawing metal product and production method and application thereof Download PDFInfo
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- CN117488292A CN117488292A CN202311442425.3A CN202311442425A CN117488292A CN 117488292 A CN117488292 A CN 117488292A CN 202311442425 A CN202311442425 A CN 202311442425A CN 117488292 A CN117488292 A CN 117488292A
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- parts
- coating agent
- metal product
- film coating
- coating liquid
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 88
- 239000002184 metal Substances 0.000 title claims abstract description 88
- 239000007888 film coating Substances 0.000 title claims abstract description 47
- 238000009501 film coating Methods 0.000 title claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 46
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- FENRSEGZMITUEF-ATTCVCFYSA-E [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].OP(=O)([O-])O[C@@H]1[C@@H](OP(=O)([O-])[O-])[C@H](OP(=O)(O)[O-])[C@H](OP(=O)([O-])[O-])[C@H](OP(=O)(O)[O-])[C@H]1OP(=O)([O-])[O-] Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].OP(=O)([O-])O[C@@H]1[C@@H](OP(=O)([O-])[O-])[C@H](OP(=O)(O)[O-])[C@H](OP(=O)([O-])[O-])[C@H](OP(=O)(O)[O-])[C@H]1OP(=O)([O-])[O-] FENRSEGZMITUEF-ATTCVCFYSA-E 0.000 claims abstract description 11
- 229940083982 sodium phytate Drugs 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 8
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000010703 silicon Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 7
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- -1 iron ions Chemical group 0.000 claims description 6
- 235000002949 phytic acid Nutrition 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 229910001415 sodium ion Inorganic materials 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical group O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims 1
- 238000007605 air drying Methods 0.000 claims 1
- 229910001882 dioxygen Inorganic materials 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 11
- 238000007127 saponification reaction Methods 0.000 abstract description 8
- 238000005406 washing Methods 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000002893 slag Substances 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 57
- 239000000126 substance Substances 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000004381 surface treatment Methods 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention discloses a film coating agent for drawing metal products, a production method and application thereof, wherein the film coating agent comprises the following components in parts by weight: 18-27 parts of sodium phytate, 18-27 parts of aluminum oxide, 18-27 parts of organic silicon, 18-27 parts of sodium tripolyphosphate, 0.4-6 parts of tungsten disulfide and 4-12 parts of sodium hydroxide; the film coating agent is dissolved in water to form film coating liquid. Compared with the existing phosphating and saponification treatment process, the coating agent is free of slag generation, waste gas, water washing and saponification in the production process, achieves energy-saving, environment-friendly and green industrial production, and eliminates the generation of pollution wastes; the method for treating the surface of the metal product before drawing by using the film coating agent has the advantages of simpler steps, high production efficiency and reduced production cost.
Description
Technical Field
The invention relates to the technical field of surface treatment before metal product drawing, in particular to a film coating agent for metal product drawing, a production method and application thereof.
Background
In metal product manufacturers, in order to meet the production requirement of high-speed drawing of metal products, the metal products need to be subjected to pretreatment in drawing, and a coating layer is formed on the surface of the metal products by treatment. In the prior art, a traditional polluted phosphating solution is adopted for phosphating before the drawing production of metal products, and a saponified pre-drawing treatment is adopted for forming a phosphating film on the surfaces of the metal products. The main production process of the drawing pretreatment is as follows: phosphating+water washing, hot water property, saponification and drying. During the production process, the phosphating solution can generate NO and NO 2 The gas, chemical dangerous waste residue containing heavy metal and oxidability are produced, and the product is washed after phosphating, so that a large amount of waste water is caused, after phosphating, COD (organic pollutant) in a saponification pond can exceed the standard through saponification, and in the phosphating saponification use process, great pollution is produced to the environment, and great three wastes are produced. These polluting wastes need to be collected and treated professionally to avoid polluting the environment.
The steps of the treatment process are complicated, the production efficiency is low, and the three wastes are treated by high environmental-friendly treatment cost, so that the production cost is increased. For this reason, improvements are needed to eliminate the generation of polluting wastes while satisfying the surface treatment requirements before drawing the metal products.
Disclosure of Invention
The invention aims to provide a film coating agent for drawing a metal product, which can be used for surface treatment before drawing the metal product and can eliminate the generation of pollution waste.
The invention also provides a production method of the coating agent for drawing the metal product and application of the coating agent in the pretreatment of drawing the metal product.
In order to achieve the above purpose, a film coating agent for drawing metal products is provided, which comprises the following components in parts by weight: 18-27 parts of sodium phytate, 18-27 parts of aluminum oxide, 18-27 parts of organic silicon, 18-27 parts of sodium tripolyphosphate, 0.4-6 parts of tungsten disulfide and 4-12 parts of sodium hydroxide; the film coating agent is dissolved in water to form film coating liquid.
The film coating agent for drawing the metal product comprises the following components in parts by weight: 20-25 parts of sodium phytate, 20-25 parts of aluminum oxide, 20-25 parts of organic silicon, 20-25 parts of sodium tripolyphosphate, 0.5-5 parts of tungsten disulfide and 5-10 parts of sodium hydroxide.
The film coating agent for drawing the metal product comprises the following components in parts by weight: 22 parts of sodium phytate, 22 parts of aluminum oxide, 22 parts of organic silicon, 22 parts of sodium tripolyphosphate, 1 part of tungsten disulfide and 8 parts of sodium hydroxide.
The production method of the coating agent for drawing the metal product comprises the following steps:
s1, weighing raw materials of each component of the film coating agent according to weight proportion;
s2, respectively placing the raw materials into a grinding machine, grinding, sieving, then placing into a stirring kettle, and uniformly stirring to obtain the film coating agent.
The application of the coating agent for drawing the metal product in the treatment before drawing the metal product comprises the following steps:
s1, weighing the film coating agent and dissolving the film coating agent in hot water according to a set weight ratio to obtain film coating liquid;
s2, maintaining the temperature of the coating liquid, and immersing the metal product in the coating liquid to extract the liquid level; or maintaining the temperature of the coating liquid, and spraying the coating liquid on the surface of the metal product;
s3, drying the surface of the metal product;
the sodium phytate and the metal form an integrated compound, the phytate is of a hexagonal ring structure, and terminal sodium ions are replaced with iron ions, aluminum ions and Si under the catalysis of a catalyst in alkaline coating liquid to form an iron phytate, si and aluminum composite metal coating layer, so that the high-speed drawing of metal products is met.
According to the application of the coating agent for drawing the metal product in the pre-drawing treatment of the metal product, in the step S1, the temperature of hot water is 65-80 ℃.
According to the application of the coating agent for drawing the metal product in the treatment before drawing the metal product, the weight ratio of the coating agent in the coating liquid is 15-25%.
According to the application of the coating agent for drawing the metal product in the pre-drawing treatment of the metal product, in the step S2, the temperature of the coating liquid is maintained at 65-80 ℃.
According to the application of the coating agent for drawing the metal product in the pretreatment of drawing the metal product, in the step S3, the surface of the metal product is dried in a natural airing mode.
The catalyst is oxygen blown into the coating liquid, and the catalyst is oxygen filled into the coating liquid.
The process for treating the surface of the metal product before drawing by using the film coating agent comprises the following steps: coating or soaking (coating liquid is coated on the surface of a metal product) +naturally drying (without three wastes).
Working principle: the sodium phytate and the metal form a stronger integrated compound, the phytate is in a hexagonal ring structure, and the terminal sodium ions are replaced with iron ions, aluminum ions and Si under the catalysis of a catalyst in alkaline coating liquid to form a stable, firm and wear-resistant iron phytate, si and aluminum composite metal coating layer, so that the high-speed drawing of metal products is satisfied.
The beneficial effects are that:
compared with the existing phosphating and saponification treatment process, the coating agent is free of slag generation, waste gas, water washing and saponification in the production process, achieves energy-saving, environment-friendly and green industrial production, and eliminates the generation of pollution wastes;
the method for treating the surface of the metal product before drawing by using the film coating agent has the advantages of simpler steps, high production efficiency and reduced production cost;
compared with the existing metal phosphating film, the chemical film formed on the surface of the metal product has stronger metal corrosion resistance;
after the film coating agent is applied to surface treatment of metal products, the produced prestressed wire and cement bond strength is strong.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described below with reference to the drawings and examples;
FIG. 1 is a diagram of the steps of application of a coating agent for drawing a metal article prior to the drawing of the metal article;
FIG. 2 is a photograph of the comparative example corrosion resistance in the salt spray test;
fig. 3 is a photograph of corrosion resistance of an embodiment of the present invention in a salt spray test.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.
In the description of the present invention, greater than, less than, exceeding, etc. are understood to exclude this number, and above, below, within, etc. are understood to include this number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Examples:
the film coating agent disclosed by the invention consists of the following raw materials: sodium phytate, alumina, silicone, sodium tripolyphosphate, tungsten disulfide and sodium hydroxide. In the production process of the film coating agent, raw materials are respectively weighed according to the weight percentage, and the specific raw material proportions are shown in table 1.
Table 1 raw materials proportioning table (weight portions)
The raw materials in the embodiment are respectively put into a grinder, ground by the grinder, sieved, and the sieved powder is put into a stirring kettle and is uniformly stirred to obtain the film coating agent. The film coating agent can be dissolved in water to form film coating liquid. Among them, the film coating agent is preferably dissolved in hot water.
When the film coating agent is applied to the treatment before the drawing of the metal product, the following steps are adopted:
s1, weighing the film coating agent and dissolving the film coating agent in hot water according to a set weight ratio to obtain film coating liquid;
s2, maintaining the temperature of the coating liquid, and immersing the metal product in the coating liquid to extract the liquid level; or maintaining the temperature of the coating liquid, and spraying the coating liquid on the surface of the metal product;
s3, drying the surface of the metal product to form a wear-resistant and extensible chemical film firmly combined with the metal body, completely meeting the drawing production requirement of the metal product, and having good anti-corrosion effect.
Wherein, in the step S1, the temperature of the hot water is 65-80 ℃, and in the step S2, the temperature of the coating liquid is maintained to be 65-80 ℃. For example, the coating agent is dissolved in hot water at 70 ℃, and the obtained coating liquid is put into a container which can be heated and kept warm so as to maintain the liquid temperature of 70 ℃ for soaking and spraying of the metal product.
In step S2, oxygen is injected into the coating liquid as a catalyst to assist the formation of a chemical film on the metal surface. Specifically, when the metal product is placed into the coating liquid for soaking, oxygen can be directly injected into the coating liquid contained in the container. When the coating liquid is sprayed, a spray head for spraying on the surface of the metal product is communicated with the container through a pipeline, and oxygen can be injected into the container or the pipeline or the spray head, so that the coating liquid can be filled with oxygen.
In the coating liquid, the weight ratio of the coating agent is 15-25% so as to ensure that the chemical film on the surface of the metal product has proper thickness. In addition, in step S3, the surface of the metal product is dried by natural drying, so that the coating liquid and the surface of the metal product have enough reaction time to form a chemical film.
In the present invention, the coating agent and the coating liquid can be used for drawing production of metal products such as steel wires.
When the coating agent is applied to surface treatment before drawing of a metal product, coating film liquid is coated on the surface of the pretreated metal product by a soaking or spraying mode, then the metal product is moved to other positions, a chemical film can be formed after natural airing for a period of time, and finally the metal product can be moved to drawing equipment for production. The surface treatment process of the metal product is simple, the production efficiency can be obviously improved, no waste residue, waste water, waste gas and other three wastes are generated, and the environmental protection performance is higher.
Compared with the existing metal surface phosphating film, the chemical film formed by applying the film coating agent to the metal surface can have better anti-corrosion effect. Taking film coating agent example 3 as an example, the film coating liquid of the mixture ratio contains 20% by weight of film coating agent, and the chemical film formed on the surface of the steel wire has the following salt spray test results.
TABLE 2 comparison of phosphate film and chemical film salt spray test on surface of Steel wire
In addition, the prestressed wire produced by the chemical film has strong bond with cement and good workability.
Table 3 steel strand bond strength test for prestressed concrete
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (10)
1. The film coating agent for drawing the metal product is characterized by comprising the following components in parts by weight:
18-27 parts of sodium phytate, 18-27 parts of aluminum oxide, 18-27 parts of organic silicon, 18-27 parts of sodium tripolyphosphate, 0.4-6 parts of tungsten disulfide and 4-12 parts of sodium hydroxide;
the film coating agent is dissolved in water to form film coating liquid.
2. The film coating agent for drawing metal products according to claim 1, which is characterized by comprising the following components in parts by weight:
20-25 parts of sodium phytate, 20-25 parts of aluminum oxide, 20-25 parts of organic silicon, 20-25 parts of sodium tripolyphosphate, 0.5-5 parts of tungsten disulfide and 5-10 parts of sodium hydroxide.
3. The film coating agent for drawing metal products according to claim 2, which is characterized by comprising the following components in parts by weight:
22 parts of sodium phytate, 22 parts of aluminum oxide, 22 parts of organic silicon, 22 parts of sodium tripolyphosphate, 1 part of tungsten disulfide and 8 parts of sodium hydroxide.
4. A method for producing a coating agent for drawing a metal product according to any one of claims 1 to 3, comprising the steps of:
s1, weighing raw materials of each component of the film coating agent according to weight proportion;
s2, respectively placing the raw materials into a grinding machine, grinding, sieving, then placing into a stirring kettle, and uniformly stirring to obtain the film coating agent.
5. Use of a film coating agent for drawing a metal product according to any one of claims 1 to 3, before the metal product is drawn, characterized by comprising the steps of:
s1, weighing the film coating agent and dissolving the film coating agent in hot water according to a set weight ratio to obtain film coating liquid;
s2, maintaining the temperature of the coating liquid, and immersing the metal product in the coating liquid to extract the liquid level; or maintaining the temperature of the coating liquid, and spraying the coating liquid on the surface of the metal product;
s3, drying the surface of the metal product;
the sodium phytate and the metal form an integrated compound, the phytate is of a hexagonal ring structure, and terminal sodium ions are replaced with iron ions, aluminum ions and Si under the catalysis of a catalyst in alkaline coating liquid to form an iron phytate, si and aluminum composite metal coating layer, so that the high-speed drawing of metal products is met.
6. The use of a coating agent for drawing a metal product according to claim 5, wherein the hot water is at a temperature of 65-80 ℃ in step S1.
7. The method according to claim 5, wherein the coating agent for drawing the metal product is 15-25% by weight of the coating agent in the coating liquid.
8. The use of a coating agent for drawing a metal product according to claim 5, wherein in step S2, the temperature of the coating liquid is maintained at 65-80 ℃.
9. The method according to claim 5, wherein in step S3, the surface of the metal product is dried by natural air drying.
10. The use of a coating agent for drawing a metal product according to claim 5, wherein the catalyst is oxygen gas filled into a coating liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311442425.3A CN117488292A (en) | 2023-11-01 | 2023-11-01 | Film coating agent for drawing metal product and production method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311442425.3A CN117488292A (en) | 2023-11-01 | 2023-11-01 | Film coating agent for drawing metal product and production method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117488292A true CN117488292A (en) | 2024-02-02 |
Family
ID=89675681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311442425.3A Pending CN117488292A (en) | 2023-11-01 | 2023-11-01 | Film coating agent for drawing metal product and production method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117488292A (en) |
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2023
- 2023-11-01 CN CN202311442425.3A patent/CN117488292A/en active Pending
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