WO2016105053A1 - 방향성 전기강판 및 그 제조방법 - Google Patents
방향성 전기강판 및 그 제조방법 Download PDFInfo
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- WO2016105053A1 WO2016105053A1 PCT/KR2015/014034 KR2015014034W WO2016105053A1 WO 2016105053 A1 WO2016105053 A1 WO 2016105053A1 KR 2015014034 W KR2015014034 W KR 2015014034W WO 2016105053 A1 WO2016105053 A1 WO 2016105053A1
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- Prior art keywords
- steel sheet
- electrical steel
- weight
- grain
- oriented electrical
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
- C23C8/16—Oxidising using oxygen-containing compounds, e.g. water, carbon dioxide
- C23C8/18—Oxidising of ferrous surfaces
Definitions
- oriented electrical steel sheets are hot rolled, cold rolled and annealed: they have a Goss Texture oriented in the ⁇ 11 () ⁇ ⁇ 001> orientation (the so-called 'goth') in the rolling direction.
- the ⁇ 110 ⁇ 001> orientation is excellent in magnetic characteristics as the degree of orientation of iron in the direction of easy axis of magnetization increases.
- Such hot rolled steel sheet is then selectively subjected to hot rolled sheet firing as necessary, and then subjected to one time or several times as necessary to produce a rolled steel sheet having the required thickness.
- the 3 ⁇ 4 a cold-rolled steel sheet has a primary recrystallization annealing (primary recrystallization annealing is because at the same time as the decarburization becomes the first material a decision is taken the first material 3 ⁇ 4 constant annealing is also referred to as "decarburization annealing!
- the conducts annealing separator Apply the agent.
- secondary recrystallization annealing secondary recrystallization air is crystal having a Goss orientation required in the electrical steel sheet structure forming up the secondary recrystallization annealing is!
- the final annealing “or also referred to as "dull finish cattle." it is performed and the optional staking the nitriding ⁇ as necessary for the purpose of strengthening the inhibitor butter before 7 i.
- the magnetic properties of the electrical steel sheet are improved by applying tension to the steel sheet to reduce iron loss.
- the directional electrical steel pipes manufactured by fishing vessels and roads are sheared and punched into shapes that can be used for transformers and the like.
- shearing and punching are carried out like the above, the shear removal annealing is carried out as necessary to remove the stress generated during processing.
- ⁇ :! 0> non ⁇ : f is the magnetic domains fine, times of directional electromagnetic steel plates manufactured in the process is referred to band i chair 7 ijeok group to improve the characteristics by reducing the magnetic domain width pwihan purpose - 3 ⁇ 4 room is used and itdi.
- the fine thinning method forms linear grooves (grooves) on the surface of the electrical steel sheet by physical means. The preferred method of forming such grooves is to irradiate a laser.
- the permanent domain micro ash-forming grooves formed by laser irradiation can be carried out in the incremental or later stages of the process of producing electrical steel, ie before or after the first recrystallization after the final cold rolling. Grooves may be formed before or after secondary recrystallization annealing or before or after planarization annealing.
- the insulating film is separated from the groove formed on the surface of the steel sheet depending on which stage of the manufacturing process of the electrical steel pipe. I can happen.
- the base coating layer is formed at the surface portion of the groove side.
- An embodiment of the present invention provides an electrical steel sheet having excellent iron loss property and excellent adhesion to a coating layer applied after groove formation by an example of residual stress of a post-terrain layer near a groove forming portion in a grain-oriented electrical steel sheet. It is. 16> is di another embodiment of the present invention to provide a manufacturing method that i such that the coupling force between the forsterite coating and the steel sheet possessing enhanced to form a forsterite film on the surface of grain-oriented electrical steel tube.
- ⁇ Forsterite hyacinth large three-dimensional network structure is formed into a steel plate such as 18 7 i possession eel is preferably present in two or more within 5'3 ⁇ 4an from the surface next to the groove,
- Forsterite anchor of the three-dimensional mesh structure formed towards the steel sheet may be formed by a length of at least 1/3 'of the average thickness of the forsterite layer, and also the three-dimensional mesh formed toward the steel sheet
- the length of the forsterite anchor of the structure in the thickness direction of the electrical steel sheet may be 0.3 to ⁇ ) ⁇ .
- the normal direction of the plane is referred to as the z-axis, and when viewed through the three-dimensional mesh forsterite anchor formed toward the base steel sheet in the xz plane, it may have a hook shape or an anchor shape.
- the three-dimensional network structure, other than the post anchor anchor is preferably a width of 3.5 / im or less.
- the average thickness of the forsterite layer may be 0.1 to 3 m
- the ratio of the hardness value of the steel sheet to the half point of the thickness of the steel sheet in the portion where the forsterite layer and the steel sheet are folded may be 1,09 to 10 days. have.
- the insulating coating layer is further formed on the upper portion of the electrical steel pipe, the insulating coating layer comprises a cateche and metal phosphate, the 3 ⁇ 4 lead coated layer is 3 ⁇ 4 or Ai
- the weight of the soft coating layer may include more than 25% by weight.
- the depth of the groove may be 3% to 10% of the thickness of the electric steel pipe.
- Such a grain-oriented electrical steel sheet is 0: based on the total composition mo weight% of the electrical steel sheet.
- the method for producing a grain-oriented electrical steel tube according to another embodiment of the present invention is the predecessor of the slab! Composition 100 weight 3 ⁇ 4 7 : 0: 0,0020 to 0.00) Increase%, * Containing: LI, the remainder is 13001: heated slab containing Fe and ball impurities with hot rolled and cold rolled Manufacturing a cold rolled steel sheet; Primary recrystallization annealing of the molten steel sheet; And applying a quenching separator containing MgO to the steel sheet on which the first recrystallization annealing is completed, and then performing a second recrystallization anneal, and forming a groove in the steel sheet to perform a microsphere treatment.
- the fine treatment may be performed after the cold rolled steel sheet is produced, after the i-th recrystallization annealing is completed, or after the after-siosis after the second recrystallization annealing is completed .
- An increase ratio of Si (/ f1 ⁇ 2Si () in the oxide layer on the surface of the steel sheet formed during the first recrystallization annealing process may be prepared under the conditions of 0.1 to 1.5.
- the annealing separator is composed of Mg03 ⁇ 4 as a slurry, and a molar Ti compound, a C13 ⁇ 4 compound, a molten sulfide, a boride, a nitride, or an oxide is mixed in a single or plural number of the steel sheet as a reaction accelerator. It can be applied at 2.5-12g./n per side,
- the main component of the annealing separator may have a mean particle size of 2.5 or less.
- MgO the main component of the solubilizer, may have an average powder particle diameter of 2 or less and 1.03 ⁇ 4 or more.
- the first cracking process may be 10 minutes or more, and the second cracking time may be 8 hours or more.
- the second material in the i decision annealing secondary bacteria "column heunhap atmosphere of nitrogen and hydrogen by Fig.
- the second crack may be carried out in a hydrogen atmosphere after reaching the degree
- the depth of the grooves formed during the micronized process is: ⁇ the thickness of the electrical steel sheet; To 10%.
- the angle formed by the width direction of the groove and the steel pipe formed in the process of refining the magnetic domain may be parallel or does not include r of 5 ′′ or less).
- washing-machine comprising: the magnetic domain refinement treatment is non-magnetic domain Seo-hee to use continuous wave laser 3 ⁇ 4 roll of Gaussian form pan - may be treated 3 ⁇ 4,
- the magnetic domain micro ash-treatment step may further include an insulation coating on the steel sheet with an insulating coating solution containing colloidal silica and metal phosphate.
- the metal phosphate in the 3 ⁇ 4 lead coating solution is A1 phosphate, Mg phosphate, or a combination thereof, and the content of Al, Mg, or a combination of idol relative to the increase of the singular insulating coating solution may be 15 times 3 ⁇ 4 or more. .
- the slab is based on the total composition of the slab 100 increase 3 ⁇ 4 Si: 2.5 to
- a forsterite coating and an insulating coating are sequentially formed on the surface of the electrical steel sheet, and the forsterite coating penetrates integrally in the lower direction of the electrical steel sheet to penetrate to form a three-dimensional network structure.
- At least two forsterite anchors are present in the surface of the groove next to the groove grooves.
- ⁇ >- 3 ⁇ 4 directional electrical steel pipe according to an embodiment of the invention. It has excellent iron loss improvement characteristics due to the residual force of the force terrait layer near the groove forming part and excellent adhesion to the coating layer applied after groove formation.
- the oriented electrical steel sheet manufactured according to one embodiment of the present invention is formed with a three-dimensional network structure while forming a three-dimensional network structure while the film is formed in a three-dimensional network structure while the film is infiltrated into the steel sheet. i doendi the binding force between the steel sheet to be reinforced - eu
- FIG. 1 is a view showing a cross section of a groove portion of a grain-oriented electrical steel sheet according to one embodiment of the present invention.
- FIG. 2 is an enlarged view of a portion within 50.MII from the contact surface of the groove of FIG. 1.
- ⁇ 50> is as described with respect to the production process of the patients, one-oriented electrical steel sheet according to 3 ⁇ 4 cases.
- the total composition of the slab is 100% by weight ; Based on 0: 0.0020 to 0080 weight
- the slab is Si: 2,5 to 4,0 weight%, C: 0.02 to 10 weight, A: 0.02 to 0.04 weight 3 ⁇ 4, Mil: 0.05 to 0,20 weight 3 ⁇ 4 , N: 0.002 to 0,012 weight S: 0.001 weight 3 ⁇ 4 to ⁇ , ⁇ weight%, and ⁇ : 0.01 to 0.08 weight 3 ⁇ 4.
- the brittleness of steel is increased and mechanical properties may be reduced.
- ⁇ 54 C is added more than 0.02 weight 3 ⁇ 4 to make the structure uniform during hot rolling, and to suppress the growth of the sinter bed structure that occurs in continuous casting, but when it exceeds 0.10 weight 3 ⁇ 4, the decarburization time increases to increase the primary recrystallization. Fine and secondary recrystallization may lead to lower magnetic content.
- ⁇ :> Al becomes 0.02 weight 3 ⁇ 4 fish 3 ⁇ 4 and acts as a growth inhibitor for sizing II in nitrification-form. However . Over 0.04% by weight of coarse nitride may precipitate out of the inhibitor.
- the 56 in may be added as a 0.05 wt 3 ⁇ 4 fishery to form sulfides to act as a grain growth inhibitor, but when exceeding 0.20 wt%, the size of the primary recrystallized grains is reduced to destabilize the secondary recrystallization and mol mol. It can form the iron loss can be reduced.
- N is more than 0.002 of affix and can act as grain growth inhibitor 7- .
- it can lead to surface defects 0.012 wt 3 ⁇ 4 exceeded, called blisters, SS is suppressed growth crystal grains by forming a sulfide is added to more than 0.0 double amount 3 ⁇ 4.
- S9 p may be added at 0.01 wt% or more to promote the growth of ⁇ 110 ⁇ ⁇ 001> aggregates in the microstructure axis. However, coming from 08 itdi you can increase the amount of increase in excess of 3 ⁇ 4 take lessons acronyms.
- 60 0 is increased from 0.0020 to 0.0080 in slab: 0 is added to the steel sheet during the first recrystallization annealing process in order to increase the carbon content. Therefore, an oxide layer of the steel sheet is formed in a state where the oxygen content in the steel is higher than a normal oxygen content, and this oxide layer is easily diffused by Mg during secondary recrystallization annealing. Therefore, it becomes possible to form and lick forsterite invading toward the steel sheet.
- the slab rolls are heated.
- the silver to heat the slab roll may be 1050 to i30 (TC), to hot roll the Ahu slab to produce a hot rolled pipe.
- ⁇ 62> does not have a hot-rolled soft decision II are you going to conduct hot-rolled sheet annealing as needed, i associated heat annealing is performed nyaenggan rolling. In the case of hot-rolled sheet annealing, it can be heated and cracked after being heated to 900 or more silver to make the hot-rolled structure uniform.
- a cold rolled sheet of final thickness is produced.
- washing-7 i may be a magnetic domain refining treatment for forming a groove having a depth of 4% to 10% of the thickness of the electrical steel sheet to cold-rolled sheet. If less than 4% of the grooves are not finely micronized for three-thirds of the wires, magnetism may be degraded due to excessive thermal effects when exceeding 1 (»).
- the grooves of the steel sheet formed by such fine-grain micro-treatment may be formed after the final cold rolling as described above, and may be formed by a process between primary recrystallization annealing and secondary recrystallization annealing, or secondary recrystallization annealing and flattening. In the process between annealing to form grooves You may-
- the grooves formed on the steel sheet by laser irradiation may be parallel to each other in the width direction of the formed grooves and the steel sheet or may be 5 ° or less (not including ⁇ — ′ 3 ⁇ 4). Other than that. Likewise, it is possible to increase the loss loss rate by making the angle of the grooved steel sheet parallel to the width direction or forming 5 (not including).
- the lead plate is subjected to primary recrystallization annealing.
- the first recrystallization annealing step may be to perform a immersion annealing after decarburization annealing or to simultaneously perform decarburization s and acupuncture annealing at this time; Annealed silver can be 700 to 950 f.
- An oxide layer such as (Payl i te) is formed on the surface.
- the weight burr of 3 ⁇ 4 (3 ⁇ 4 /! May be from 0.01 to 1.5.
- the weight ratio of the oxide layer formed during the first recrystallization annealing process was closely related to the appropriate oxygen input amount during the first recrystallization annealing, that is, 3 ⁇ 4 carbon annealing.
- the oxygen input amount during decarburization annealing is controlled in the sham state in which the oxygen content is included in the steel sheet more than the normal oxygen content.
- Oxygen input during decarburization annealing should take into account the oxidizing atmosphere ( ⁇ dew point, hydrogen atmosphere), the shaping of the oxide layer on the surface of the steel sheet, and the silver content of the steel sheet. Judging only by the oxidizing ability, the higher the oxidizing ability, the higher the oxygen partial pressure, so it is better to increase the oxidizing capacity
- the oxygen content of the surface oxygen layer in the steel sheet is in the range of 600-1.000 ppm.
- the steel sheet produces the best primary recrystallized grain to form a goth orientation.
- the second recrystallization annealing is applied to the annealing stripping agent * steel sheet mainly composed of MgO.
- Annealing separator is a slurry-type Mg0 # main ingredient, and as a reaction promoting agent Ti compound, Ci compound, sulfide, boride. Nitride or oxides are mixed in single or plural. Since the annealing separator is a slurry type, it is applied to the steel sheet by the coating roll, and the coating amount is preferably 2.5-I 2 g / nf per side of the steel sheet.
- This annealing separator causes MgO, the main component of the annealing separator, to react with Sii or / and P Si0 4 of the oxide layer to form a Forsierite (Mg 2 SK) glass film upon secondary recrystallization annealing.
- 3 ⁇ 4 using an average powder particle diameter of the main component MgO of the annealing separator of 2, 3 ⁇ 4 ii or less is preferable.
- the average powder up diameter is 2 / M or less
- secondary recrystallization Atmosphere during sottun is by secondary bacterial 3 ⁇ 4 heunhap silver is carried out in an atmosphere of nitrogen and hydrogen, 2 chagyun "column is reached, it is preferable since even geoteo performed in a hydrogen atmosphere,
- the second recrystallization annealing is applied by applying an annealing separator containing MgO3 ⁇ 4 as a main component, the Mg in the annealing process is diffused into the base steel sheet, and the Si oxide and Mg reacts with each other to form forsterite
- the formed forsterite film penetrates into the steel sheet and is formed in the form of a hook or 3 ⁇ 4 ⁇ anchor to form a three-dimensional network srruci ure. If a forsterite film is formed on the surface of the 3 ⁇ 4 ' steel sheet and the film penetrates into the base steel sheet and is formed into a three-dimensional network structure, the forsterite film on the surface of the plate is strengthened with the steel sheet.
- grains with a goth nucleus (* 110) were first grown in the interior of the steel sheet to produce a grain-oriented electrical steel sheet having excellent electrical properties.
- the insulation of the electrical steel pipe may be secured by applying an insulating coating solution containing metal phosphate.
- a coating solution containing colloidal salica and metal phosphate wherein the metal phosphate may be A phosphate, Mg phosphate, or a combination of idols.
- the content of Ai, Mg, or a combination of these may be more than 15% by weight relative to the weight of 3 ⁇ 4 liquid. 15 parts by 3 ⁇ 4 bots "only if, the adhesion between the carrying plate is lowered and the corrosion resistance can be inferior itdi -,
- the groove after the first recrystallization annealing is completed
- the :: 1 rub may be formed after the second recrystallization annealing is completed.
- the groove formation method by a laser is performed by irradiating a laser on the steel plate which runs in the direction perpendicular
- the laser can be C laser YAG laser : semiconductor laser. If a fiber laser or the like can be used, and the groove can be formed to a depth and width that exhibits a finer micronization as shown in Figs. 1 and 2, it is possible to use either a Fils laser or a continuous wave laser. It is preferable to use a continuous wave laser in the form of a Gaussian laser to form a groove of uniform shape.
- grooves are formed with a laser before the first recrystallization annealing, after forming the grooves, if an annealing separator is applied, the second recrystallization annealing, and then an insulation coating is performed, not only the surface of the steel pipe but also the grooves.
- the steel plate, the posterior film, and the thin film are sequentially stacked and stacked.
- FIG. 1 is a cross-sectional view of a groove portion of a grain-oriented electrical steel sheet according to an embodiment of the present invention.
- FIG. 2 is an enlarged view of a portion (a display area of FIG. 1) within 5 openings laterally in the groove of FIG. 1.
- the directional electrical steel 3 ⁇ 4 is an electrical steel sheet.
- the posterior coating 200 and the insulating coating 300 are sequentially stacked on the surface of (1.00).
- the groove formed on the steel sheet is different from the surface of the surrounding steel sheet, and only the insulating film 300 is formed directly on the steel sheet 100 in the state where the forsterite permeation membrane 200 is removed.
- the film lamination structure in the grooves is different from the film lamination structure on the surface of the steel sheet in the second recrystallization process when the grooves are formed after the second recrystallization annealing. This is because the formed forsterite film 200 is removed by the laser.
- ⁇ H> This is in the case of ⁇ sterite coating according to an embodiment of the present invention, as shown in Fig. ⁇ the forsterite layer (20.0) parallel to the surface of the steel sheet is extended in one direction to the lower side of the steel sheet This is because it penetrates toward (100) and has a three-dimensional network structure.
- This three-dimensional network of forsterite film 200 is layered parallel to the surface of the steel plate, and at the same time the three-dimensional network structure is continuously connected to the film 200 as hook or anchor (1 (); ⁇ anchor to hold plate 100 in the form of bars and g it is coupled firmly eu
- the three-dimensional monolithic structure of the postcoat film 200 may be represented by a single point 20 or a hooked shape 10 when viewed in the cross section of the steel sheet.
- the three-dimensional monolithic forsterite nodules 200 are hereinafter referred to as anchor type post-coat coatings.
- At least one anchor is formed on the side of the groove formed on the surface of the steel plate. More specifically, on the surface of the steel sheet, starting from the side of the groove and away from the groove, 50 i !! It is more preferably formed with more than one word in the l.
- Anchor-type forsterite is formed on the oriented electrical steel sheet thus made.
- the film is able to maintain excellent adhesion with the steel sheet even after insulation coating and / or stress relief annealing. Therefore, the number of anchors in the anchor type post-coat film 200 formed on the surface of the electrical steel sheet is advantageous in many cases, if the number of the adhesion is advantageous, the upper limit of the number is not particularly limited.
- each anchor ( ⁇ ), 20) is diffused into the steel sheet possessing 3 ⁇ 4 in the secondary recrystallization annealing quadrangle. Sampled during the first recrystallization
- the length of each anchor (10, 20) i.e., the length that each beaker penetrates deeply in the thickness direction of the electrical steel sheet, may be more than 1/3 of the average thickness of the forsterite coating. -Or 0.3 to 10 / ⁇ . More specifically, it may be 0.5 to ⁇ /.£ ⁇ and the forsterite coating layer on the surface of the steel sheet can maintain excellent adhesion within this range. : U! S> And the width of the anchor in the anchor type forsterite coating. That is, the width of the electrical steel sheet in the rolling direction or the width direction is 0.1 / to 3.5. 11 preferably frozen-di-. The length and width of the anchor are based on the cross section of the steel sheet.
- the rolling direction of the electrical steel sheet is referred to as the y-axis in the width direction of the X-axis electrical steel sheet and the normal direction (thickness direction) in the xy plane is referred to as two axes.
- Forsterite invading toward the base steel sheet in the xz plane may be in the form of a hook or anchor when observed.
- the average thickness of the post-terrain layer (2 ( ⁇ 0)) excluding the respective acker ⁇ 10/20) 1 'of forsterite that has been immersed toward the base steel sheet 100 may be 0.1 to 8 !. If the post-terrain layer is less than ⁇ , the 3 ⁇ 4-force is small after groove formation, and thus the iron loss is not improved. If the post-terrain layer is more than 3iffl, the groove depth deviation 1 ⁇ may cause magnetic degradation.
- Depth of the groove (D) in FIG. 1 may be 3 to 10% of the thickness of the electrical steel sheet. ' Iron if less than 3% . Groove depth for hand improvement cannot be secured, and in case of more than 10% 3 ⁇ 4], the magnetic permeability of the 3 ⁇ 4 steel sheet may be inferior due to thermal influences.
- the hardness value of the steel sheet at 1/2 of the thickness of the steel sheet / steel sheet) was 1,09 to 10 days. If the thickness is less than 1.09, the adhesion between the forsterite layer and the base steel sheet may be degraded, and thus the iron loss and adhesion may be degraded after the formation of grooves and relaxation of the stress. In the case of 10 super-depths, the stress deviation between the forsterite layer and the base metal increases, resulting in a decrease in the groove depth uniformity .
- the magnetic thin-fiber insulation coating fK 300 may be formed by applying an insulation coating solution containing a silicate and a metal phosphate by heat treatment.
- the insulating coating layer 300 has a post-terrain layer formed on the surface of the groove when the micronization is performed before the secondary recrystallization annealing (silver annealing). It is formed on the top.
- the angle between the groove and the steel plate in the width direction is parallel or less than (0
- the metal phosphate May be a 3: sum of A1 phosphate, Mg phosphate, or idol, Al, Mg. Or the amount of the combination may be at least 15 increments. ] If less than five rings, the adhesion to the base steel sheet is lowered, the corrosion resistance may be inferior 3 ⁇ 4 ⁇
- the electrical steel sheet Si: 3 ⁇ 43 ⁇ 4 of C: 2.5 to 4, .0, C: 0.02 to ⁇ , ⁇ ) heavy ring, Ai: 0.02 to 0.04 increase 3 ⁇ 4.
- Mrs: 0.05 to 0,20 increased 3 ⁇ 4, N: 0.002 to 0.3 [) 12 jjongryang.
- N 0.003 increase 3 ⁇ 4
- S 005 increase%
- P 0.02 increase 3 ⁇ 4 roll
- the balance was prepared as Slab «Fe and impurity.
- the slab was heated in iio (rc and then hot rolled to produce a hot rolled steel sheet. Afterwards, the hot rolled steel sheet was cold rolled to produce a 0.2: 1 ⁇ 23 ⁇ 4 thick steel sheet.
- Decarburization annealing and sedimentation annealing were performed for 200 seconds at a mixed gas atmosphere of% +5 () 3 ⁇ 43 ⁇ 4) of hydrogen, nitrogen, and ammonia.
- MgO # was used as the main component and Ti compound was applied as a semi-aqueduct promoter to apply ⁇ g / nf per sheet steel sheet number 3 ⁇ 4.
- the primary crack The secondary cracking degree was 1,200T :, and the temperature rising temperature range was 7Q ( : ⁇ ) 5 ( ⁇ :: in the silver section and 4Qt per hour, and in the temperature range of 950 1, 2001: '
- the annealing atmosphere was 12 () 0T :: Ki-Ji win at 25 vol 3 ⁇ 4: 2 and 75 vol 3 ⁇ 4: 3 ⁇ 4 mixed gas atmosphere, 1200 X; 100 volume%: 3 ⁇ 4 atmosphere after reaching After cooling for 10 hours at low temperature
- continuous wave power laser 1 was irradiated to the surface of the electrical steel sheet to form grooves having a depth as shown in Table 1 on the surface of the steel sheet.
- the laser used in this case was a continuous wave fiber laser having a Gaussian morphology and an output of 900.
- an insulating coating was performed on the surface of the grooved electric steel 3 ⁇ 4 using an insulating coating solution containing colloidal silica and metal phosphate.
- the insulating coating solution metal phosphate was used as ⁇ phosphate, Ai phosphate; ⁇
- Unacid 50% by weight of H lead-based coating liquid containing-.
- the length of the forsterite anchor means the length in the thickness direction of the electrical steel sheet of the forsterite amplifier extending in the forsterite layer existing within 50 im from the side of the groove and penetrating toward the steel sheet.
- the 0 content in the slab was fixed at 0, 0050 wt%, and the Si (VFe 2 S i0 4 weight ratio formed in the first recrystallization process was changed to 0.05 to 2, Length and number were adjusted.
- the number of forsterite anchors in Table 1. extends from the post tert layer existing within the side of the groove w and represents the number of forsterite anchors inserted into the steel sheet.
- adhesion can be achieved by contacting the specimen with an arc of 10, 20. 30 to 1.00 v ⁇ .
- ⁇ : -3 Represents the minimum arc diameter without peeling off the film.
- Example 3 ⁇ 4 described above is illustrative in all respects and limited Should be understood as not.
- the scope of the invention is indicated by the following claims rather than the above description. It is construed that all changes or modified forms ⁇
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/539,637 US11180819B2 (en) | 2014-12-24 | 2015-12-21 | Grain-oriented electrical steel plate and production method therefor |
CN201580070933.0A CN107109511B (zh) | 2014-12-24 | 2015-12-21 | 取向电工钢板及其制造方法 |
JP2017534251A JP6655084B2 (ja) | 2014-12-24 | 2015-12-21 | 方向性電磁鋼板およびその製造方法 |
EP15873580.3A EP3239324B1 (en) | 2014-12-24 | 2015-12-21 | Grain-oriented electrical steel sheet and production method therefor |
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CN111133118A (zh) * | 2017-09-28 | 2020-05-08 | 杰富意钢铁株式会社 | 方向性电磁钢板 |
US20220044855A1 (en) * | 2018-12-19 | 2022-02-10 | Posco | Oriented electrical steel sheet and method for producing same |
EP3910080A4 (en) * | 2019-01-08 | 2022-09-28 | Nippon Steel Corporation | ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MAKING THE SAME, STEEL SHEET FOR FINISH ANNEALING AND METHOD FOR MAKING THE SAME, AND ANNEALING RELEASE AGENT |
EP3910079A4 (en) * | 2019-01-08 | 2022-09-28 | Nippon Steel Corporation | CORNORIENTED ELECTROSTEEL SHEET, PROCESS FOR THE PRODUCTION OF CORNORIENTED MAGNETIC STEEL SHEET AND ANNEALING RELEASE AGENT FOR THE PRODUCTION OF CORNORIENTED MAGNETIC STEEL SHEET |
EP3910076A4 (en) * | 2019-01-08 | 2022-09-28 | Nippon Steel Corporation | ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MAKING THE SAME, AND ANNEALING RELEASE AGENT |
EP3910077A4 (en) * | 2019-01-08 | 2022-09-28 | Nippon Steel Corporation | CORNORIENTED ELECTROSTEEL SHEET, PROCESS FOR THE PRODUCTION OF CORNORIENTED MAGNETIC STEEL SHEET AND ANNEALING RELEASE AGENT FOR THE PRODUCTION OF CORNORIENTED MAGNETIC STEEL SHEET |
EP3910078A4 (en) * | 2019-01-08 | 2022-10-05 | Nippon Steel Corporation | ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MAKING THE SAME, AND ANNEALING RELEASE AGENT IMPLEMENTED IN MAKING SUCH STEEL SHEET |
EP3910081A4 (en) * | 2019-01-08 | 2022-10-05 | Nippon Steel Corporation | ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MAKING THE SAME, AND ANNEALING RELEASE AGENT |
US12051529B2 (en) * | 2018-12-19 | 2024-07-30 | Posco Co., Ltd | Oriented electrical steel sheet and method for producing same |
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CN111133118A (zh) * | 2017-09-28 | 2020-05-08 | 杰富意钢铁株式会社 | 方向性电磁钢板 |
EP3690067A4 (en) * | 2017-09-28 | 2020-08-05 | JFE Steel Corporation | ORIENTED GRAIN ELECTRIC STEEL SHEET |
US11198916B2 (en) | 2017-09-28 | 2021-12-14 | Jfe Steel Corporation | Grain-oriented electrical steel sheet |
US20220044855A1 (en) * | 2018-12-19 | 2022-02-10 | Posco | Oriented electrical steel sheet and method for producing same |
US12051529B2 (en) * | 2018-12-19 | 2024-07-30 | Posco Co., Ltd | Oriented electrical steel sheet and method for producing same |
EP3910080A4 (en) * | 2019-01-08 | 2022-09-28 | Nippon Steel Corporation | ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MAKING THE SAME, STEEL SHEET FOR FINISH ANNEALING AND METHOD FOR MAKING THE SAME, AND ANNEALING RELEASE AGENT |
EP3910079A4 (en) * | 2019-01-08 | 2022-09-28 | Nippon Steel Corporation | CORNORIENTED ELECTROSTEEL SHEET, PROCESS FOR THE PRODUCTION OF CORNORIENTED MAGNETIC STEEL SHEET AND ANNEALING RELEASE AGENT FOR THE PRODUCTION OF CORNORIENTED MAGNETIC STEEL SHEET |
EP3910076A4 (en) * | 2019-01-08 | 2022-09-28 | Nippon Steel Corporation | ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MAKING THE SAME, AND ANNEALING RELEASE AGENT |
EP3910077A4 (en) * | 2019-01-08 | 2022-09-28 | Nippon Steel Corporation | CORNORIENTED ELECTROSTEEL SHEET, PROCESS FOR THE PRODUCTION OF CORNORIENTED MAGNETIC STEEL SHEET AND ANNEALING RELEASE AGENT FOR THE PRODUCTION OF CORNORIENTED MAGNETIC STEEL SHEET |
EP3910078A4 (en) * | 2019-01-08 | 2022-10-05 | Nippon Steel Corporation | ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MAKING THE SAME, AND ANNEALING RELEASE AGENT IMPLEMENTED IN MAKING SUCH STEEL SHEET |
EP3910081A4 (en) * | 2019-01-08 | 2022-10-05 | Nippon Steel Corporation | ORIENTED ELECTROMAGNETIC STEEL SHEET AND METHOD FOR MAKING THE SAME, AND ANNEALING RELEASE AGENT |
US11591668B2 (en) | 2019-01-08 | 2023-02-28 | Nippon Steel Corporation | Grain-oriented electrical steel sheet and method for manufacturing same and annealing separator |
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