CN112936109B - Method for preparing metal coating steel plate by shot blasting descaling - Google Patents
Method for preparing metal coating steel plate by shot blasting descaling Download PDFInfo
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- CN112936109B CN112936109B CN202011603141.4A CN202011603141A CN112936109B CN 112936109 B CN112936109 B CN 112936109B CN 202011603141 A CN202011603141 A CN 202011603141A CN 112936109 B CN112936109 B CN 112936109B
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- water
- pressure water
- steel plate
- steel
- spraying
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 88
- 239000010959 steel Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000011248 coating agent Substances 0.000 title claims abstract description 15
- 238000000576 coating method Methods 0.000 title claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 13
- 239000002184 metal Substances 0.000 title claims abstract description 13
- 238000005422 blasting Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims description 35
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 239000010963 304 stainless steel Substances 0.000 claims description 6
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- -1 zinc-aluminum-magnesium Chemical compound 0.000 claims description 3
- 238000005554 pickling Methods 0.000 abstract description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 5
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000007602 hot air drying Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000006187 pill Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
-
- B08B1/12—
-
- B08B1/20—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/06—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for producing matt surfaces, e.g. on plastic materials, on glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Abstract
A method for preparing a metal coating steel plate by shot blasting descaling belongs to the technical field of metal surface anticorrosion treatment. The method is characterized in that a high-pressure water nozzle is used, water and steel shots are fully mixed in the high-pressure water nozzle according to a certain proportion, then the pressure of the mixture is increased, the mixed water and steel shot mixture is sprayed and hit on the surface of a steel plate through the high-pressure water nozzle, and oxide skin on the surface of the steel plate is smashed and separated from the surface of the steel plate. The whole process section has no pickling link, high-pressure water and steel shots are recycled, and the whole process flow is pollution-free and environment-friendly.
Description
Technical Field
The invention relates to a method for preparing a metal coating steel plate by shot blasting descaling, belonging to the technical field of metal surface anticorrosion treatment.
Background
The surface anticorrosion treatment of the steel plate mainly comprises the following steps: the metal plate coating steel plate produced by the method has certain corrosion resistance, so the metal plate coating steel plate is widely applied to a plurality of industries such as automobiles, household appliances, communication, photovoltaics, urban traffic and the like. And some iron and steel group companies such as Bao steel, first steel, tang steel, wine steel, this steel and other large-scale united enterprises are all producing on a large scale, but the adhesion of the product at present is not strong, bending resistance is not good, and all adopt the technology of pickling to carry on the descaling and derusting to its hot rolling base plate that uses, then carry on the surface coating of alloy liquid, therefore must have serious pollution to the surrounding environment, hydrochloric acid evaporation will corrode the production facility at the same time, and waste acid and mud produced can not discharge directly, the subsequent treatment cost is very high.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for preparing a metal coating steel plate by shot blasting descaling, which can realize green environmental protection, uniform and adjustable coating, good adhesive force and stable corrosion resistance. The method is realized through the following technical scheme.
A method for preparing steel plate with metal coating by shot blasting descaling is characterized in that a high-pressure water nozzle is used, water and steel shots are fully mixed in the high-pressure water nozzle according to a certain proportion, then the pressure of the mixture is increased, the mixed water and steel shot mixture is sprayed and impacted on the surface of the steel plate through the high-pressure water nozzle, oxide skin on the surface of the steel plate is crushed and separated from the surface of the steel plate, the purpose of removing scale and rust is achieved, the natural color of a steel matrix is exposed on the surface of the steel plate, and then the surface of alloy liquid of the steel plate is coated.
In particular, in the method for manufacturing the metal-coated steel plate by shot blasting descaling, high-pressure water solid-liquid two-phase flow containing a certain amount of steel shots is sprayed and hit on the surface of the hot steel strip through a high-pressure water nozzle, and the method is divided into 4 high-pressure water shot blasting descaling sections of a rough spraying section 1, a rough spraying section 2, a fine spraying section 1 and a fine spraying section 2, wherein:
(1) The rough spraying 1 section is that high-strength alloy cast angular steel shots with the grain diameter of 0.7-0.5mm and the Rockwell hardness of 50-60HRC and water are fully mixed according to the volume ratio of 20-30; most of oxide scale on the surface of the hot strip is removed after 1 section of rough spraying, a shallow irregular pit is formed on the surface of the substrate, and a certain amount of oxide scale residue still exists in the pit;
(2) The coarse spraying 2 section is to fully mix high-strength alloy cast angular steel shots with the grain diameter of 0.35-0.45mm and the Rockwell hardness of 50-60HRC and water according to the volume ratio of 25-30; after the rough spraying 2-section spraying striking treatment, residual iron oxide scales in pits on the surface of the steel plate are basically removed completely, and dense irregular pits with small areas and slightly deep depths are formed on the surface of the steel strip;
(3) The fine spraying section 1 is to fully mix 304 stainless steel round balls with the grain diameter of 0.30-0.40mm and the Rockwell hardness of 45-50HRC and water according to the volume ratio of 20-30 to 100, then to spray and strike the mixture of water and steel balls formed by fully mixing the water and the steel balls onto a steel plate through a high-pressure water nozzle, the spraying amount of each high-pressure water nozzle is 8-10Kg/min, the pressure of the mixture of water and steel balls sprayed by the high-pressure water nozzle is 30-40MP, and the time of the steel plate passing through the fine spraying section 1 is 4-6 minutes; after 1 section of fine spraying, the scales originally existing on the surface of the steel plate and formed by the iron scale are completely removed, and uniform arc-shaped pits are basically formed;
(4) The fine spraying 2 section is that the 304 stainless steel round shot with the grain diameter of 0.20-0.30mm and the Rockwell hardness of 40-45HRC and water are fully mixed according to the volume ratio of 30 to 100, then the mixture of the water and the steel shot formed by fully mixing the water and the steel shot is sprayed and hit on the steel plate through the high-pressure water nozzles, the spraying amount of each high-pressure water nozzle is 8-10Kg/min, the pressure of the mixture of the water and the steel shot sprayed by the high-pressure water nozzles is 30-40MP, and the time of the steel plate passing through the fine spraying 2 section is 4-6 minutes; after 2 sections of fine spraying, arc-shaped pits which are uniform, compact and uniform are formed on the surface of the steel plate.
Particularly, each section of high-pressure water jet nozzles of the 4 sections of high-pressure water shot blasting descaling sections are 16 groups, each group of the high-pressure water jet nozzles is 4 and is symmetrically arranged on the upper surface and the lower surface of two sides of the steel plate, each jet nozzle is provided with two inlets and one outlet, one inlet of the two inlets is a mixed flow inlet of steel shots and water, the other inlet is a high-pressure water inlet, and the outlet is a high-speed jet outlet after the steel shots and the high-pressure water are fully mixed.
After the descaling process section, the steel strip enters a water scrubbing section, and the surface of the steel strip is further cleaned by three groups of polyamide fiber nylon brush rolls and three rinsing water paths, so that the surface of the steel strip is bright and has no residue; in order to ensure that the steel strip is not rusted within a short time after descaling and rusting, a passivation tank and a hot air drying section are installed behind a water brushing section, industrial salt water with the concentration of 10-15% is used as passivation liquid in the passivation tank, an iron box body with openings at two ends and a sealed middle part and a 4-exhaust nozzle is adopted in the hot air drying section, and the drying temperature is controlled to be about 120 ℃. The surface of the strip steel is swept by the air nozzle, so that the surface of the strip steel is dried; and automatically centering and rolling the opposite sides of the EPC, ensuring that the steel coils are rolled uniformly, and packaging and warehousing for hot dip galvanizing aluminum magnesium.
The invention achieves good effect. Mainly expressed in the following aspects.
1. The invention can ensure that the alloy liquid can be in contact with the surface of the steel plate in a larger area in the process of plating the steel plate by improving the roughness of the surface of the steel strip, so that the alloy liquid and the steel plate are better integrated, the bonding strength of an alloy layer and the steel plate in the plating process is effectively improved, and the risk of coating falling or cracking in the deep drawing or bending process of a product is avoided.
2. The whole process section has no pickling link, high-pressure water and steel shots are recycled, and oxide skin and crushed steel shot powder are used as iron ore concentrate for steel plants to recycle, so that the zero discharge standard of waste water, waste gas and solid waste is achieved. The whole process flow is pollution-free and environment-friendly.
Detailed Description
An equipment and a process for preparing a steel strip of a hot-dip galvanized aluminum-magnesium alloy on the acid-free ecological descaling rust surface of a steel strip remove the surface oxide skin of the hot steel strip through a front acid-free descaling rust equipment and adjust the surface roughness of a substrate strip so as to achieve the aim of adjusting the thickness and the adhesive force of a zinc-aluminum-magnesium coating.
The present invention is further explained below.
Test example 1
1. The test raw material is a Q235B coiled plate with the plate width of 800mm and the thickness of 4.50 mm.
2. Selecting high-strength alloy angular steel shots with the sizes of 0.6mm and 0.45mm and the hardness of 60HRC from the acid-free descaling rough spraying section 1 and the rough spraying section 2 respectively;
3. the sand feeding amount of the coarse spraying 1 section and the coarse spraying 2 section is 5Kg/min, and the high-pressure water pressure is 50MP;
4. the fine spray 1 section and the fine spray 2 section are respectively adjusted to 50MP and 40MP by using 304 stainless steel round pills with Rockwell hardness of 40-45HRC and with the diameter of 0.3mm and 0.2mm, and the high-pressure water pressure is respectively adjusted to 50MP and 40MP.
5. The descaling process speed is controlled at 30m/min.
Scale and rust removal results: the surface of the plate strip is clean and free of residues such as oxide scales, and the roughness test result of the surface of the plate strip is RA 5.0-RA 5.5.
The hot galvanizing aluminum magnesium result is as follows: the surface roughness of the plating layer with the thickness of 24-28um is RA3.2-RA3.5. The plate surface is uniform and fine as seen by naked eyes, and the hand touch feeling has frosted feeling.
Test example 2
1. The test raw material is a Q235B coiled plate with the plate width of 750mm and the thickness of 3.5 mm.
2. Respectively using high-strength alloy angular steel shots with the hardness of 55HRC and the sizes of 0.5mm and 0.35mm for the rough spraying 1 section and the rough spraying 2 section of the acid-free descaling rust, wherein the sand feeding amount is 5Kg/min, and the high-pressure water pressure is 50MP;
3. the fine spray 1 section and the fine spray 2 section are respectively adjusted to 40MP and 30MP by using 304 stainless steel round pills with Rockwell hardness of 40-45HRC and with the diameter of 0.3mm and 0.2mm, and the high-pressure water pressure is respectively adjusted to 40MP and 30MP.
4. The descaling rust process speed is controlled at 30m/min.
5. Scale and rust removal results: the surface of the plate strip is clean and free of residues such as oxide scale and the like, and the roughness test result of the surface of the plate strip is RA3.2-RA3.5.
Hot galvanizing of aluminum magnesium results: the surface roughness of the coating with the thickness of 13-18um is RA2.0-RA2.5, the surface of the coating is uniform and fine as seen by naked eyes, and the hand touch feeling has slight frosted feeling.
Claims (2)
1. A method for preparing a zinc-aluminum-magnesium metal coating steel plate by shot blasting descaling is characterized in that a high-pressure water nozzle is used, water and steel shots are fully mixed in the high-pressure water nozzle according to a certain proportion, then the pressure of the mixture is increased, the mixed water and steel shot mixture is sprayed and impacted on the surface of a hot rolled steel plate through the high-pressure water nozzle, oxide skin on the surface of the hot rolled steel plate is crushed and separated from the surface of the hot rolled steel plate,
wherein, through the high pressure water jet nozzle, the step of striking the mixture of water and shot after mixing on the hot-rolled steel plate surface of spraying is divided into 4 high pressure water ball blast descaling sections of 1 section of rough spraying, 2 sections of rough spraying, 1 section of fine spraying, 2 sections of fine spraying, wherein:
(1) The rough spraying section 1 is to fully mix high-strength alloy cast angular steel shots with the grain diameter of 0.7-0.5mm and the Rockwell hardness of 50-60HRC and water according to the volume ratio of 20-30;
(2) The 2 rough spraying section is that high-strength alloy cast angular steel shots with the grain diameter of 0.35-0.45mm and the Rockwell hardness of 50-60HRC and water are fully mixed according to the volume ratio of 25-30;
(3) The fine spraying section 1 is to fully mix 304 stainless steel round balls with the grain diameter of 0.30-0.40mm and the Rockwell hardness of 45-50HRC and water according to the volume ratio of 20-30; after 1 section of fine spraying, the scales originally existing on the surface of the hot rolled steel plate and formed by iron scales are completely removed, and uniform arc-shaped pits are basically formed;
(4) The fine spraying 2 section is that 304 stainless steel round balls with the grain diameter of 0.20-0.30mm and the Rockwell hardness of 40-45HRC and water are fully mixed according to the volume ratio of 30 to 100, then a mixture of the water and the steel balls formed by fully mixing the water and the steel balls is sprayed and impacted on the hot rolled steel plate through high-pressure water nozzles, the spraying amount of each high-pressure water nozzle is 8-10Kg/min, the pressure of the mixture of the water and the steel balls sprayed by the high-pressure water nozzles is 30-40MPa, and the time of the hot rolled steel plate passing through the fine spraying 2 section is 4-6 minutes.
2. The method for producing a zinc-aluminum-magnesium metal coated steel sheet by shot blasting descaling according to claim 1, wherein each of the 4 high-pressure water jet nozzles in the 4 high-pressure water shot blasting descaling sections has 16 groups, each group has 4 nozzles symmetrically arranged on the upper and lower surfaces of the hot-rolled steel sheet, each nozzle has two inlets and one outlet, one of the two inlets is a mixed stream inlet of the shot and the water, the other inlet is a high-pressure water inlet, and the outlet is a high-speed jet outlet after the shot and the high-pressure water are fully mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011603141.4A CN112936109B (en) | 2020-12-30 | 2020-12-30 | Method for preparing metal coating steel plate by shot blasting descaling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011603141.4A CN112936109B (en) | 2020-12-30 | 2020-12-30 | Method for preparing metal coating steel plate by shot blasting descaling |
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| CN112936109B true CN112936109B (en) | 2023-03-21 |
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| CN116372817B (en) * | 2023-03-29 | 2023-09-26 | 南通大学 | Multifunctional robot for photovoltaic array |
| CN116855866A (en) * | 2023-09-04 | 2023-10-10 | 扬州大发螺丝有限公司 | Intelligent equipment control process for hot-dip galvanizing of double-end stud without pickling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101322042B1 (en) * | 2011-12-08 | 2013-10-28 | 주식회사 포스코 | Descaling apparatus |
| CN104056865B (en) * | 2013-03-19 | 2017-02-22 | 宝山钢铁股份有限公司 | Steel plate surface treatment method and device |
| CN103481204B (en) * | 2013-09-28 | 2016-04-06 | 宁波大隆机器制造有限公司 | For the nozzle of high-pressure water jet normal temperature descaling process |
| CN203495770U (en) * | 2013-09-30 | 2014-03-26 | 杭州浙大精益机电技术工程有限公司 | Surface grinding material spraying and descaling device for steel pipe |
| CN208867003U (en) * | 2018-09-19 | 2019-05-17 | 北京科技大学 | A kind of strip descaling device based on impact |
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