CN116475042A - Production method of electrical steel rapid self-adhesive coating for new energy automobile - Google Patents
Production method of electrical steel rapid self-adhesive coating for new energy automobile Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 148
- 239000011248 coating agent Substances 0.000 title claims abstract description 145
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 124
- 239000000853 adhesive Substances 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 238000000137 annealing Methods 0.000 claims abstract description 21
- 238000003475 lamination Methods 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 18
- 239000001301 oxygen Substances 0.000 claims abstract description 18
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 17
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 43
- 239000010959 steel Substances 0.000 claims description 43
- 239000003513 alkali Substances 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 7
- 238000007602 hot air drying Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005201 scrubbing Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding 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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/10—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an adhesive surface
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
-
- 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
- B05D3/08—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 flames
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- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention discloses a production method of an electrical steel rapid self-adhesive coating for a new energy automobile, which comprises the following steps: rolling the non-oriented electrical steel strip to the thickness of a finished product; annealing the electrical steel strip, and controlling the oxygen content on the surface of the electrical steel strip to be 100-200 ppm by controlling the atmosphere and the dew point of the annealing furnace; uniformly coating the self-adhesive coating liquid on the surface of the electrical steel strip in a two-roller type forward coating mode, wherein the solid content of the self-adhesive coating liquid is controlled to be 20-40%, the roughness of a coating roller is controlled to be 0.2-0.5 mu m, and the thickness of a single-sided coating is controlled to be 1.0-3.0 mu m; the electrical steel strip coated with the coating is cured at one time at the temperature of 150-180 ℃, and the heating rate is controlled to be 2.5-3.0 ℃/S; coiling the coated electrical steel strip at normal temperature; lamination is carried out on the punched sheets made of the coated electrical steel at 130-200 ℃ and then heating is carried out for 30-60S, so that the punched sheets are mutually bonded to prepare the iron core. The invention can prepare the electrical steel rapid self-adhesive coating for the new energy automobile with the bonding strength larger than 4.0N/mm, realizes continuous operation of punching, lamination and iron core manufacturing, and improves the production efficiency.
Description
Technical Field
The invention belongs to the technical field of special coatings, and particularly relates to a production method of a rapid self-adhesive coating for electrical steel for a new energy automobile.
Background
In the manufacturing process of the new energy automobile motor, the iron core lamination is fixed through the self-adhesive coating coated on the surface of the electrical steel, and compared with the traditional fastening modes such as welding, bolts, riveting and the like, the novel energy automobile motor has the advantages of high fixing strength, less magnetic property damage, small vibration and noise of the iron core and the like.
In general, a steel mill coats the surface of electrical steel with the self-adhesive coating liquid in a liquid state, and the coating is in an activated state through a certain drying process. The motor user heats and stacks the coatings in the activated state to realize mutual bonding, thereby manufacturing the motor iron core.
Chinese patent CN1532003a discloses a method for coating electrical steel self-adhesive coating, comprising a) strip steel is coated by two or three rolls, and baked at 130-260 ℃ for 30-45S; b) After the coated strip steel lamination is continuously cured for 0.4-4 hours under the curing pressure of 6-10 bar and the curing temperature of 130-220 ℃, the thickness of the coating is 3-10 mu m.
Chinese specialCN109013253a discloses a method for producing electrical steel self-adhesive coating, which comprises 1) cold rolling electrical steel into finished product; 2) Cleaning and drying; 3) Annealing treatment; 4) The temperature of the plate is controlled below 50 ℃, the solid content of the self-adhesive coating liquid is controlled at 35-60%, and the viscosity is controlled at 40-70S; 5) Adopting two-roller or three-roller to carry out forward coating, and uniformly coating self-adhesive coating liquid on the surface of the electrical steel strip; 6) Baking the electrical steel strip for 50-70S, and then cooling the electrical steel strip to below 70 ℃; 7) Coiling with coiling tension of 20-30N/mm 2 The method comprises the steps of carrying out a first treatment on the surface of the 8) Lamination is carried out and then curing is continued for 1-3 hours.
Chinese patent CN114345670a discloses a method for coating an electrical steel self-adhesive coating with excellent surface quality, comprising (1) rolling the electrical steel to a thickness of a finished product, and obtaining an electrical steel strip after cleaning, drying, annealing, and cooling; (2) Coating self-adhesive coating liquid on the surface of the electrical steel strip in a two-roller type forward coating mode, wherein the roughness value Ra of a coating roller is 0.3-1.2 mu m, the ratio of the rotating speed of the coating roller to the running speed of the electrical steel strip is 0.6-1.0, and the heating rate is 1.8-3.1 ℃/S; (3) And (3) solidifying and coiling the electrical steel strip with the coating. The electrical steel obtained by the method is laminated under the pressure of 1-3 MPa, and then is continuously cured for 1-3 hours at the temperature of 160-210 ℃, and the coatings of the electrical steel are mutually bonded, wherein the bonding strength is more than 7.5N/mm.
Chinese patent CN115156008A discloses a method for producing an ultra-thin electrical steel self-adhesive coating and application thereof, comprising (1) rolling the thickness of electrical steel strip to < 0.30mm using twenty high rolling mill; (2) Cleaning and drying the surface of the electrical steel strip, and then sending the electrical steel strip into an annealing furnace for annealing, wherein the surface of the electrical steel strip is oxidized after annealing, and the total oxygen content is 30-70 ppm; (3) The self-adhesive coating liquid is coated on the surface of the electrical steel strip in a two-roller type forward coating mode; (4) And (5) solidifying and coiling the electrical steel strip coated with the coating. The production method of the ultrathin electrical steel self-adhesive coating overcomes a plurality of technical difficulties of narrow production process window, multiple influencing interference factors and the like of the self-adhesive coating, and can be used for electrical steel with the thickness of less than 0.30 mm.
The production method of the electrical steel self-adhesive coating in the prior art mainly aims at the production method of the conventional self-adhesive coating, and can continuously produce the electrical steel self-adhesive coating product by adopting a plurality of measures such as coating, coating drying, controlling the states of electrical steel plates before and after coating the coating and the like. However, after lamination, the coating can reach a passivation state only by continuously heating for 1-4 hours under a certain pressure, so that the efficiency is low, and the continuous operation of the motor core of the new energy automobile is not facilitated.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a production method of an electrical steel rapid self-adhesive coating for a new energy automobile, which comprises the following steps:
s1, rolling the non-oriented electrical steel strip to the thickness of a finished product by using a twenty-high roll mill or acid continuous rolling, and then sequentially carrying out alkali spray washing, alkali scrubbing, water spraying and hot air drying on the electrical steel strip;
s2, annealing the electrical steel strip, wherein the oxygen content of the surface of the electrical steel strip is controlled to be 100-200 ppm by controlling the atmosphere and the dew point of the annealing furnace;
s3, uniformly coating the self-adhesive coating liquid on the surface of the electrical steel strip in a two-roller type forward coating mode, wherein the solid content of the self-adhesive coating liquid is controlled to be 20-40%, the roughness Ra of a coating roller is controlled to be 0.2-0.5 mu m, and the thickness of the single-sided coating is controlled to be 1.0-3.0 mu m;
s4, curing the electrical steel strip coated with the coating at a temperature of 150-180 ℃ for one time, and controlling the heating rate to be 2.5-3.0 ℃/S to enable the coating to reach an activated state;
s5, coiling the coated electrical steel strip at normal temperature, wherein the coiling tension is controlled to be 10-20 KN;
s6, laminating the punched sheets made of the coated electrical steel at 130-200 ℃ and heating for 30-60S to enable the punched sheets to be mutually bonded to prepare the iron core.
Further, in the above production method of the electrical steel rapid self-adhesive coating for new energy automobiles, in step S3, the temperature of the electrical steel strip is controlled to be below 40 ℃ and then the self-adhesive coating is applied.
Further, in the above-mentioned production method of the electrical steel rapid self-adhesion coating for new energy automobile, in step S4, the temperature of the electrical steel strip is cooled to below 50 ℃ before the electrical steel strip coated with the coating contacts the furnace roller.
As an embodiment, in the method for producing the electrical steel rapid self-adhesion coating for the new energy automobile, the following steps are adopted:
in step S2, controlling the surface oxygen content of the electrical steel to be 120ppm;
in the step S3, the plate temperature of the steel belt is controlled below 40 ℃, then a self-adhesive coating is coated, the solid content of the self-adhesive coating liquid is controlled to be 25%, and the thickness of the single-sided coating is controlled to be 2 mu m;
in the step S4, before the coated steel belt contacts the furnace roller, the temperature of the steel belt is cooled to below 40 ℃, and then the coated steel belt is solidified at 150 ℃ for the first time, and the heating rate is 2.5 ℃/S;
in step S6, lamination is carried out on the punched sheets made of the coated electrical steel at 150 ℃ and then heating is carried out for 50S, so that the punched sheets are mutually bonded to form the iron core.
As an embodiment, in the method for producing the electrical steel rapid self-adhesion coating for the new energy automobile, the following steps are adopted:
in step S2, controlling the surface oxygen content of the electrical steel to 160ppm;
in the step S3, the plate temperature of the steel belt is controlled below 40 ℃, then a self-adhesive coating is coated, the solid content of the self-adhesive coating liquid is controlled to be 30%, and the thickness of the single-sided coating is controlled to be 3 mu m;
in the step S4, before the coated steel belt contacts the furnace roller, the temperature of the steel belt is cooled to below 40 ℃, and then the coated steel belt is solidified at 180 ℃ for the first time, wherein the heating rate is 3.0 ℃/S;
in step S6, lamination is carried out on the punched sheets made of the coated electrical steel at 180 ℃ and then heating is carried out for 40S, so that the punched sheets are mutually bonded to form the iron core.
As an embodiment, in the method for producing the electrical steel rapid self-adhesion coating for the new energy automobile, the following steps are adopted:
in step S2, controlling the surface oxygen content of the electrical steel to be 180ppm;
in the step S3, the plate temperature of the steel belt is controlled below 40 ℃, then a self-adhesive coating is coated, the solid content of the self-adhesive coating liquid is controlled at 40%, and the thickness of the single-sided coating is controlled at 1.5 mu m;
in the step S4, before the coated steel belt contacts the furnace roller, the temperature of the steel belt is cooled to below 50 ℃, and then the coated steel belt is solidified at 180 ℃ for the first time, wherein the heating rate is 3.0 ℃/S;
in step S6, lamination is carried out on the punched sheets made of the coated electrical steel at 200 ℃ and then heating is carried out for 30S, so that the punched sheets are mutually bonded to form the iron core.
Further, in the production method of the electrical steel rapid self-adhesion coating for the new energy automobile, the thickness of the finished electrical steel belt is 0.15-0.35 mm.
The production method of the electrical steel rapid self-adhesion coating for the new energy automobile has the following advantages and beneficial effects: by controlling the oxygen content of the electrical steel before coating and the solid content of the coating liquid, optimizing the coating and curing process and adopting the rapid lamination measure of the punching sheet, the electrical steel rapid self-adhesive coating with the bonding strength of more than 4.0N/mm for new energy automobiles can be prepared, the continuous operation of punching sheet, lamination and iron core manufacturing is realized, and the production efficiency is greatly improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below in connection with specific embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The production method of the electrical steel rapid self-adhesion coating for the new energy automobile comprises the following steps:
s1, rolling a non-oriented electrical steel strip to a finished product thickness of 0.15-0.35 mm by using a twenty-high roll mill or acid continuous rolling, and then sequentially carrying out alkali spray washing, alkali brushing, water spraying and hot air drying on the electrical steel strip;
s2, annealing the electrical steel strip, wherein the oxygen content of the surface of the electrical steel strip is controlled to be 100-200 ppm by controlling the atmosphere and the dew point of the annealing furnace;
s3, controlling the temperature of the electrical steel strip below 40 ℃, and then coating a self-adhesive coating, wherein the solid content of the self-adhesive coating liquid is controlled to be 20-40%, the coating liquid is uniformly coated on the surface of the electrical steel strip in a two-roller type forward coating mode, the roughness value Ra of a coating roller is 0.2-0.5 mu m, and the thickness of the single-sided coating is controlled to be 1.0-3.0 mu m;
s4, curing the coated electrical steel strip at the temperature of 150-180 ℃ for one time, controlling the heating rate to be 2.5-3.0 ℃/S, and enabling the coating to reach an activated state, wherein the temperature of the electrical steel strip is firstly cooled to below 50 ℃ before the electrical steel strip coated with the coating contacts the furnace roller in order to avoid the damage of the coating in the hot state;
s5, coiling the coated electrical steel strip at normal temperature, wherein the coiling tension is controlled to be 10-20 KN;
s6, laminating a plurality of punched sheets made of coated electrical steel at 130-200 ℃ and heating for 30-60S, so that the punched sheets are mutually bonded to form the iron core.
In the production method of the electrical steel rapid self-adhesion coating for the new energy automobile, the electrical steel rapid self-adhesion coating with the bonding strength of more than 4.0N/mm can be prepared by controlling the oxygen content of the electrical steel before coating, the solid content of the coating liquid and optimizing the coating and curing process and adopting the rapid lamination measure of the punching sheet, so that continuous operation of punching sheet, lamination and iron core manufacturing is realized, and the production efficiency is greatly improved.
The following describes the production method of the electrical steel rapid self-adhesion coating for the new energy automobile in combination with a specific embodiment.
Example 1
Rolling the non-oriented electrical steel strip to the thickness of a finished product by using a twenty-high roll mill or acid continuous rolling, and sequentially carrying out alkali spray washing, alkali scrubbing, water spraying and hot air drying on the steel strip; annealing the electrical steel strip, and controlling the oxygen content on the surface of the electrical steel strip to be 120ppm by controlling the atmosphere and the dew point of the annealing furnace; the plate temperature of the steel belt is controlled below 40 ℃, then a self-bonding coating is coated, the solid content of the self-bonding coating liquid is controlled at 25%, two-roller type forward coating is adopted, the coating liquid is uniformly coated on the surface of the electrical steel belt, the surface roughness Ra of the coating roller is 0.2-0.5 mu m, and the thickness of the single-sided coating is controlled at 2 mu m; before the coated steel belt contacts the furnace roller, cooling the steel belt to below 40 ℃, and then solidifying the coated steel belt at 150 ℃ for the first time, wherein the heating rate is 2.5 ℃/S; lamination is carried out on the punched sheets made of the coated electrical steel at 150 ℃ and then heating is carried out for 50S, so that the punched sheets are mutually bonded to form an iron core, and the bonding strength reaches more than 4.0N/mm after detection.
Example 2
Rolling the non-oriented electrical steel strip to the thickness of a finished product by using a twenty-high roll mill or acid continuous rolling, and sequentially carrying out alkali spray washing, alkali scrubbing, water spraying and hot air drying on the steel strip; annealing the electrical steel strip, and controlling the oxygen content on the surface of the electrical steel strip to 160ppm by controlling the atmosphere and the dew point of the annealing furnace; the plate temperature of the steel belt is controlled below 40 ℃, then a self-bonding coating is coated, the solid content of the self-bonding coating liquid is controlled at 30%, two-roller type forward coating is adopted, the coating liquid is uniformly coated on the surface of the electrical steel belt, the surface roughness Ra of the coating roller is 0.2-0.5 mu m, and the thickness of the single-sided coating is controlled at 3 mu m; before the coated steel belt contacts the furnace roller, cooling the temperature of the steel belt to below 40 ℃, and then solidifying the coated steel belt at 180 ℃ for the first time, wherein the heating rate is 3.0 ℃/S; lamination of the punched sheets made of the coated electrical steel at 180 ℃ and heating for 40S, so that the punched sheets are mutually bonded to form an iron core, and the bonding strength reaches more than 4.0N/mm after detection.
Example 3
Rolling the non-oriented electrical steel strip to the thickness of a finished product by using a twenty-high roll mill or acid continuous rolling, and sequentially carrying out alkali spray washing, alkali scrubbing, water spraying and hot air drying on the steel strip; annealing the electrical steel strip, and controlling the oxygen content on the surface of the electrical steel strip to be 180ppm by controlling the atmosphere and the dew point of the annealing furnace; the plate temperature of the steel belt is controlled below 40 ℃, then a self-bonding coating is coated, the solid content of the self-bonding coating liquid is controlled at 40%, two-roller type forward coating is adopted, the coating liquid is uniformly coated on the surface of the electrical steel belt, the surface roughness Ra of the coating roller is 0.2-0.5 mu m, and the thickness of the single-sided coating is controlled at 1.5 mu m; before the coated steel belt contacts the furnace roller, cooling the temperature of the steel belt to below 50 ℃, and then solidifying the coated steel belt at 180 ℃ for the first time, wherein the heating rate is 3.0 ℃/S; lamination is carried out on the punched sheets made of the coated electrical steel at the temperature of 200 ℃ and then heating is carried out for 30S, so that the punched sheets are mutually bonded to form an iron core, and the bonding strength reaches more than 4.0N/mm after detection.
In summary, the production method of the rapid self-bonding coating for the new energy automobile comprises the steps of rolling the non-oriented electrical steel strip to the thickness of a finished product by using a twenty-high roll mill or acid tandem rolling, annealing the electrical steel strip after sequentially carrying out alkali spray washing, alkali brushing, water spraying and hot air drying, controlling the oxygen content of the surface of the electrical steel to be 100-200 ppm by adjusting the atmosphere and the dew point of an annealing furnace, carrying out forward coating by adopting a two-roll coater, then carrying out primary curing at 150-180 ℃ at the heating rate of 2.5-3.0 ℃/S, finally carrying out coiling of the coated steel strip at normal temperature, laminating the self-bonding coated electrical steel sheet at 130-200 ℃ and then heating for 30-60S, thereby obtaining the rapid self-bonding coating for the new energy automobile electrical steel with the bonding strength of more than 4.0N/mm.
Compared with the prior art, the production method of the electrical steel rapid self-adhesive coating for the new energy automobile has the following advantages and beneficial effects: by controlling the oxygen content of the electrical steel before coating and the solid content of the coating liquid, optimizing the coating and curing process and adopting the rapid lamination measure of the punching sheet, the electrical steel rapid self-adhesive coating with the bonding strength of more than 4.0N/mm for new energy automobiles can be prepared, the continuous operation of punching sheet, lamination and iron core manufacturing is realized, and the production efficiency is greatly improved.
It should be noted that, in this document, the term "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting thereof; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The production method of the electrical steel rapid self-adhesion coating for the new energy automobile is characterized by comprising the following steps of:
s1, rolling the non-oriented electrical steel strip to the thickness of a finished product by using a twenty-high roll mill or acid continuous rolling, and then sequentially carrying out alkali spray washing, alkali scrubbing, water spraying and hot air drying on the electrical steel strip;
s2, annealing the electrical steel strip, wherein the oxygen content of the surface of the electrical steel strip is controlled to be 100-200 ppm by controlling the atmosphere and the dew point of the annealing furnace;
s3, uniformly coating the self-adhesive coating liquid on the surface of the electrical steel strip in a two-roller type forward coating mode, wherein the solid content of the self-adhesive coating liquid is controlled to be 20-40%, the roughness Ra of a coating roller is controlled to be 0.2-0.5 mu m, and the thickness of the single-sided coating is controlled to be 1.0-3.0 mu m;
s4, curing the electrical steel strip coated with the coating at a temperature of 150-180 ℃ for one time, and controlling the heating rate to be 2.5-3.0 ℃/S to enable the coating to reach an activated state;
s5, coiling the coated electrical steel strip at normal temperature, wherein the coiling tension is controlled to be 10-20 KN;
s6, laminating the punched sheets made of the coated electrical steel at 130-200 ℃ and heating for 30-60S to enable the punched sheets to be mutually bonded to prepare the iron core.
2. The method for producing a rapid self-adhesive coating of electrical steel for new energy vehicles according to claim 1, wherein in step S3, the temperature of the electrical steel strip is controlled to be below 40 ℃ and then the self-adhesive coating is applied.
3. The method for producing a rapid self-adhesive coating of electrical steel for new energy automobile according to claim 1, wherein in step S4, the electrical steel strip is cooled to a temperature below 50 ℃ before the electrical steel strip coated with the coating contacts the furnace roller.
4. The method for producing the electrical steel rapid self-adhesive coating for the new energy automobile according to claim 1, which is characterized by comprising the following steps:
in step S2, controlling the surface oxygen content of the electrical steel to be 120ppm;
in the step S3, the plate temperature of the steel belt is controlled below 40 ℃, then a self-adhesive coating is coated, the solid content of the self-adhesive coating liquid is controlled to be 25%, and the thickness of the single-sided coating is controlled to be 2 mu m;
in the step S4, before the coated steel belt contacts the furnace roller, the temperature of the steel belt is cooled to below 40 ℃, and then the coated steel belt is solidified at 150 ℃ for the first time, and the heating rate is 2.5 ℃/S;
in step S6, lamination is carried out on the punched sheets made of the coated electrical steel at 150 ℃ and then heating is carried out for 50S, so that the punched sheets are mutually bonded to form the iron core.
5. The method for producing the electrical steel rapid self-adhesive coating for the new energy automobile according to claim 1, which is characterized by comprising the following steps:
in step S2, controlling the surface oxygen content of the electrical steel to 160ppm;
in the step S3, the plate temperature of the steel belt is controlled below 40 ℃, then a self-adhesive coating is coated, the solid content of the self-adhesive coating liquid is controlled to be 30%, and the thickness of the single-sided coating is controlled to be 3 mu m;
in the step S4, before the coated steel belt contacts the furnace roller, the temperature of the steel belt is cooled to below 40 ℃, and then the coated steel belt is solidified at 180 ℃ for the first time, wherein the heating rate is 3.0 ℃/S;
in step S6, lamination is carried out on the punched sheets made of the coated electrical steel at 180 ℃ and then heating is carried out for 40S, so that the punched sheets are mutually bonded to form the iron core.
6. The method for producing the electrical steel rapid self-adhesive coating for the new energy automobile according to claim 1, which is characterized by comprising the following steps:
in step S2, controlling the surface oxygen content of the electrical steel to be 180ppm;
in the step S3, the plate temperature of the steel belt is controlled below 40 ℃, then a self-adhesive coating is coated, the solid content of the self-adhesive coating liquid is controlled at 40%, and the thickness of the single-sided coating is controlled at 1.5 mu m;
in the step S4, before the coated steel belt contacts the furnace roller, the temperature of the steel belt is cooled to below 50 ℃, and then the coated steel belt is solidified at 180 ℃ for the first time, wherein the heating rate is 3.0 ℃/S;
in step S6, lamination is carried out on the punched sheets made of the coated electrical steel at 200 ℃ and then heating is carried out for 30S, so that the punched sheets are mutually bonded to form the iron core.
7. The method for producing a rapid self-adhesive coating of electrical steel for new energy automobiles according to any one of claims 1 to 6, wherein the thickness of the finished electrical steel strip is 0.15 to 0.35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310439342.2A CN116475042A (en) | 2023-04-23 | 2023-04-23 | Production method of electrical steel rapid self-adhesive coating for new energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310439342.2A CN116475042A (en) | 2023-04-23 | 2023-04-23 | Production method of electrical steel rapid self-adhesive coating for new energy automobile |
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