CN111318434A - Treatment method of non-oriented electrical steel material - Google Patents
Treatment method of non-oriented electrical steel material Download PDFInfo
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- CN111318434A CN111318434A CN201811523645.8A CN201811523645A CN111318434A CN 111318434 A CN111318434 A CN 111318434A CN 201811523645 A CN201811523645 A CN 201811523645A CN 111318434 A CN111318434 A CN 111318434A
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- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 title claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 121
- 239000011248 coating agent Substances 0.000 claims abstract description 117
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 238000004381 surface treatment Methods 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 20
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 10
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 238000007598 dipping method Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 14
- 239000010959 steel Substances 0.000 abstract description 14
- 239000000853 adhesive Substances 0.000 abstract description 8
- 230000001070 adhesive effect Effects 0.000 abstract description 8
- 238000000137 annealing Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003672 processing method Methods 0.000 abstract 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000005097 cold rolling Methods 0.000 description 5
- 238000007761 roller coating Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- -1 post-cleaning Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
- B05D3/102—Pretreatment of metallic substrates
-
- 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
- C23C22/06—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 aqueous acidic solutions with pH less than 6
-
- 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
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
Abstract
The invention relates to a processing method of a non-oriented electrical steel material, which comprises the following steps: s1, cleaning the surface of the cold-rolled and annealed non-oriented electrical steel strip, performing surface treatment by using a treatment solution, and drying to form a phosphating film on the surface of the non-oriented electrical steel strip; s2, coating the dried non-oriented electrical steel strip with a water-soluble insulating coating, and then baking at 350-500 ℃ to form a coating film with a single-side dry film thickness of 0.3-10 mu m on the surface of the non-oriented electrical steel strip. Compared with the prior art, the invention has the following beneficial effects: the invention sets up the coating process and the strip steel baking process by surface treatment of the strip steel, adjustment of coating liquid parameters, and good coating operation, excellent coating performance, especially excellent coating adhesion, pencil hardness and scratch resistance. Meanwhile, for products with the film thickness of the coating film being less than 2 micrometers, the coating adhesive force is remarkably improved after annealing and bluing treatment.
Description
Technical Field
The invention relates to a production process of non-oriented electrical steel, in particular to a treatment method of non-oriented electrical steel material with good coating adhesion.
Background
The non-oriented electrical steel product is applied to the fields of compressors, motors, large-scale thermal power, hydroelectric power, nuclear power and the like, and users have high requirements on the insulating property of the coating on the surface of the electrical steel product, so that an insulating coating with a certain thickness needs to be coated on the surface of a steel plate, and the adhesion of the coating is one of important indexes for evaluating the performance of the coating.
For coating products with the thickness less than 2 mu m, the adhesive force of the coating products, particularly the adhesive force of the coating after annealing and bluing treatment is poor, and the use requirements of users can not be met; for coating products larger than 2 μm, the adhesion of the sample after coating and baking is poor, especially for coating products with high film thickness, high solid content and high filler.
Chinese patent application No. 200510028263.4 discloses a method for manufacturing a non-oriented electrical steel sheet with an insulating coating by cleaning before rolling, continuous annealing, pickling with weak acid, post-cleaning, coating, drying and baking to produce a finished product. In this patent, after pickling with a weak acid, post-cleaning is performed, and particularly, the surface of a phosphating film produced only with phosphoric acid is loose, which affects the quality of surface treatment. Meanwhile, the coating is mainly applied to organic and inorganic salt coatings, and the coating amount of a dry film is controlled to be 0-4 g/m2Preferably 1.5 to 2.8g/m2Too large a coating amount results in a great decrease in adhesion of the coating.
Chinese patent application No. 201110297973.2 discloses a production method of thickened semi-organic coating non-oriented silicon steel, which solves the coating performance problems of rough surface, poor adhesiveness and yellowing color of a coating of non-oriented electrical steel through coating liquid blending and coating baking control. In this patent, the coating film thickness is less than 2 μm, which is suitable for semi-organic coatings, and no mention is made of adhesion after annealing and bluing. Further, the film thickness is increased, and the adhesion of the coating layer of the product is deteriorated.
Chinese patent application No. 201410163551.X discloses the production of electrical steel extremely thick insulating coating with good film forming property, after surface treatment is carried out on the surface of a steel plate in an annealing furnace, a layer of hollow oxide film with certain thickness is formed on the surface of the steel plate, and then a coating product obtained after the extremely thick insulating coating is coated and then baked and cured has excellent film forming property, and simultaneously, the requirements of high solid content, excellent surface insulation property and adhesiveness, good hot pressing stability and corrosion resistance and the like of the electrical steel environment-friendly extremely thick insulating coating are met. The patent is that after the surface of a steel plate is treated in an annealing furnace, an extremely thick insulating coating is coated and then baked and cured, and a coating film-forming product is obtained. Since the surface treatment of the steel plate by controlling the dew point is difficult, the oxide film is easy to be uneven, so that the product quality is unstable and the production equipment is negatively influenced. Meanwhile, the oxide film on the surface of the steel plate also has negative influence on the magnetic performance of the non-oriented electrical steel product.
Chinese patent application No. 201110315303.9 discloses a production method of an extremely thick insulating coating on the surface of electrical steel, which realizes continuous production of 2-10 mu m coating products through coating liquid preparation, strip steel coating, coating baking and online film thickness detection. The patent is only a conventional coating and baking control production method, the adhesive force of a product coating needs to be further improved under the film thickness of 2-10 mu m, and the coating is easy to peel off.
Disclosure of Invention
The invention aims to provide a method for processing a non-oriented electrical steel material with good coating adhesion.
The invention is realized by the following technical scheme:
the invention provides a treatment method of a non-oriented electrical steel material, which comprises the following steps:
s1, cleaning the surface of the cold-rolled and annealed non-oriented electrical steel strip, performing surface treatment by using a treatment solution, and drying to form a phosphating film on the surface of the non-oriented electrical steel strip;
s2, coating the dried non-oriented electrical steel strip with a water-soluble insulating coating, and then baking at 350-500 ℃ to form a coating film with a single-side dry film thickness of 0.3-10 mu m on the surface of the non-oriented electrical steel strip.
Preferably, the treatment liquid is an aqueous solution containing phosphoric acid and a silane coupling agent, wherein the mass fraction of the phosphoric acid is 5-50%, and the mass fraction of the silane coupling agent is 1-20%.
Preferably, the surface treatment method in step S1 is dipping, spraying or coating.
Preferably, the time for the immersion in step S1 is 3 to 35 seconds.
Preferably, after the dipping or spraying in step S1, the extrusion treatment is performed by using at least one pair of extrusion rolls, and the drying pressure is controlled to be 0.5 to 10 kg.
Preferably, the material of the squeezing roller is polyurethane or rubber.
Preferably, the coating in step S1 is roll coated with two or four rolls.
Preferably, the thickness of the phosphating film is 20-300 nm. Too thin and too thick a phosphating film can affect the adhesion after final coating.
Preferably, the drying temperature in the step S1 is 35-90 ℃ and the time is 3-25S.
Preferably, the coating in step S2 is performed by a two-roll coater or a three-roll coater.
Preferably, the coating liquid specific gravity of the water-soluble insulating coating is 1.02-1.80 g/m2The viscosity of the coating liquid is 12-150 s.
Preferably, the water-soluble insulating coating is an inorganic coating, an organic coating or an inorganic-organic hybrid coating. Is especially suitable for high film thickness, high solid content and high filler coating liquid.
Preferably, the baking time in step S2 is 30-70S.
Preferably, the heating mode of the baking is thermal radiation heating, infrared heating or hot air circulation heating.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, through the surface treatment of the strip steel, the parameters of the coating liquid are adjusted, the coating process and the strip steel baking process are formulated, the coating operation is good, the coating performance is excellent, especially the coating adhesive force, the pencil hardness and the scratch resistance are excellent, and meanwhile, for the product with the coating film thickness of less than 2 μm, the coating adhesive force is obviously improved after annealing and bluing treatment.
The invention is suitable for compressor and generator non-oriented electrical steel products, and is particularly suitable for large generator users with high film thickness requirements.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
Cold rolling, cleaning the surface of the annealed non-oriented electrical steel strip, entering a strip surface treatment process, immersing the strip into a surface treatment liquid tank containing 5 wt% of phosphoric acid and 1.0 wt% of silane coupling agent for 3s, squeezing the strip by a pair of polyurethane squeezing rollers with the pressure of 10kg, and drying the strip by hot air at 35 ℃ for 3s to obtain the strip with the surface phosphating film of 20 nm.
The electrical steel sheet enters a coating chamber, and the specific gravity of the coating liquid is 1.02g/m2And the viscosity is 12 seconds, the coating is carried out by adopting a two-roller coating machine, the target film thickness of a single-side dry film is 0.3 mu m, and then the coating is baked in a baking furnace for 30s at 350 ℃, so that the product has good coating adhesion and other properties.
Example 2
Cold rolling, cleaning the surface of the annealed non-oriented electrical steel strip, entering a strip surface treatment process, immersing the strip into a surface treatment liquid tank containing 50 wt% of phosphoric acid and 20 wt% of silane coupling agent for 35s, squeezing the strip by adopting two pairs of polyurethane squeezing rollers with the pressure of 0.5kg, and drying the strip by hot air at 90 ℃ for 25s to obtain the strip with the surface phosphating film of 300nm thickness.
The electrical steel sheet enters a coating chamber, and the specific gravity of coating liquid is 1.8g/m2Viscosity of 150 seconds, coating by a three-roll coating machine, and baking at 500 ℃ in a baking furnace for 7, wherein the target film thickness of a single-side dry film is 10 mu m0s, the product has good coating adhesion and other properties.
Example 3
Cold rolling, cleaning the surface of the annealed non-oriented electrical steel strip, entering a strip surface treatment process, immersing the strip into a surface treatment liquid tank containing 25 wt% of phosphoric acid and 8 wt% of silane coupling agent for 10s, squeezing the strip by adopting two pairs of polyurethane squeezing rollers with the pressure of 5kg, and drying the strip by hot air at 55 ℃ for 20s to obtain the strip with the surface phosphating film of 200 nm.
The electrical steel sheet enters a coating chamber, and the specific gravity of the coating liquid is 1.5g/m2And the viscosity is 120 seconds, a three-roll coating machine is adopted for coating, the target film thickness of a single-side dry film is 5.0 mu m, then the single-side dry film is baked for 40s in a baking furnace at 350 ℃, and the product coating has good adhesive force and other properties.
Example 4
Cold rolling, cleaning the surface of the annealed non-oriented electrical steel strip, entering a strip surface treatment process, spraying treatment liquid on the upper surface and the lower surface of the strip, wherein the treatment liquid is an aqueous solution containing 30 wt% of phosphoric acid and 12 wt% of silane coupling agent, squeezing by three pairs of polyurethane squeezing rollers with the pressure of 2kg, and drying by hot air at 80 ℃ for 8s to obtain the strip with the surface phosphating film of 100 nm.
The electrical steel sheet enters a coating chamber, and the specific gravity of coating liquid is 1.2g/m2And the viscosity is 30 seconds, the coating is carried out by adopting a two-roller coating machine, the target film thickness of a single-side dry film is 2.0 mu m, and then the coating is baked for 65 seconds in a baking furnace at 500 ℃, so that the product has good coating adhesion and other properties.
Example 5
And (3) cold rolling, cleaning the surface of the annealed non-oriented electrical steel strip steel, entering a strip steel surface treatment process, coating a surface treatment solution containing 15 wt% of phosphoric acid and 5 wt% of silane coupling agent on the surface of the electrical steel strip by using a 1-to-2-roll coating device, and drying by hot air at 65 ℃ for 10s to obtain the strip steel with the surface phosphating film of 150 nm.
The electrical steel sheet enters a coating chamber, and the specific gravity of coating liquid is 1.1g/m2The viscosity is 18 seconds, the coating is carried out by adopting a two-roller coating machine, the target film thickness of a single-side dry film is 0.8 mu m, and then the coating is baked for 50s in a baking furnace at 450 ℃ to coat the productGood adhesion and other properties.
The results of the coating property measurements are shown in Table 1.
TABLE 1
Note:
it represents excellent, ○ good, △ general, ▽ poor, not applicable
Compared with the conventional production method, the technology provided by the invention can obviously improve the coating performance, especially the coating adhesion, of the non-oriented electrical steel product. When the coating amount is 0.3-2.0 mu m, the coating still has no peeling even after annealing and bluing treatment, has excellent coating performance and is suitable for electrical steel products of compressors; for the electrical steel products applied to large generators, even if the coating amount reaches 10 mu m, the coating performance, especially the adhesive force is excellent, and the coating does not peel off.
In summary, the present invention is only a preferred embodiment, and not intended to limit the scope of the invention, and all equivalent changes and modifications in the shape, structure, characteristics and spirit of the present invention described in the claims should be included in the scope of the present invention.
Claims (14)
1. A method for processing non-oriented electrical steel material is characterized by comprising the following steps:
s1, cleaning the surface of the cold-rolled and annealed non-oriented electrical steel strip, performing surface treatment by using a treatment solution, and drying to form a phosphating film on the surface of the non-oriented electrical steel strip;
s2, coating the dried non-oriented electrical steel strip with a water-soluble insulating coating, and then baking at 350-500 ℃ to form a coating film with a single-side dry film thickness of 0.3-10 mu m on the surface of the non-oriented electrical steel strip.
2. The method of treating a non-oriented electrical steel material according to claim 1, wherein the treatment liquid is an aqueous solution containing phosphoric acid and a silane coupling agent, wherein the phosphoric acid is 5 to 50% by mass and the silane coupling agent is 1 to 20% by mass.
3. The method of treating a non-oriented electrical steel material as claimed in claim 1, wherein the surface treatment method in step S1 is dipping, spraying or coating.
4. The method for treating a non-oriented electrical steel material as claimed in claim 3, wherein the dipping time in the step S1 is 3 to 35 seconds.
5. The method for treating non-oriented electrical steel material according to claim 3, wherein after the dipping or spraying in step S1, the extrusion treatment is performed by using at least one pair of extrusion rolls, and the extrusion pressure is controlled to be 0.5-10 kg.
6. The method of processing a non-oriented electrical steel material according to claim 5, wherein the material of the squeeze roll is polyurethane or rubber.
7. The method for treating a non-oriented electrical steel material according to claim 3, wherein the coating in the step S1 is performed by roll coating using two or four rolls.
8. The method for treating a non-oriented electrical steel material according to claim 1, wherein the thickness of the phosphating film is 20 to 300 nm.
9. The method for treating a non-oriented electrical steel material as claimed in claim 1, wherein the drying temperature in step S1 is 35 to 90 ℃ for 3 to 25 seconds.
10. The method for treating a non-oriented electrical steel material as claimed in claim 1, wherein the coating in the step S2 employs a two-roll coater or a three-roll coater.
11. The method for treating a non-oriented electrical steel material according to claim 1, wherein the coating liquid specific gravity of the water-soluble insulating coating is 1.02 to 1.80g/m2The viscosity of the coating liquid is 12-150 s.
12. The method of treating a nonoriented electrical steel material according to claim 1 or 11, characterized in that the water-soluble insulating coating is an inorganic coating, an organic coating or an inorganic-organic hybrid coating.
13. The method of processing a non-oriented electrical steel material as set forth in claim 1 or 11, wherein the baking time in step S2 is 30 to 70 seconds.
14. The method of treating a nonoriented electrical steel material as claimed in claim 13 wherein said baking is by thermal radiation heating, infrared heating or hot air circulation heating.
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| CN201811523645.8A CN111318434A (en) | 2018-12-13 | 2018-12-13 | Treatment method of non-oriented electrical steel material |
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| CN201811523645.8A CN111318434A (en) | 2018-12-13 | 2018-12-13 | Treatment method of non-oriented electrical steel material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116218279A (en) * | 2023-03-31 | 2023-06-06 | 佛山市普加化工有限公司 | Silane modified acrylic ester phosphate adhesion promoter and application thereof |
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