WO2017111509A1 - 방향성 전기강판 및 그 제조방법 - Google Patents
방향성 전기강판 및 그 제조방법 Download PDFInfo
- Publication number
- WO2017111509A1 WO2017111509A1 PCT/KR2016/015119 KR2016015119W WO2017111509A1 WO 2017111509 A1 WO2017111509 A1 WO 2017111509A1 KR 2016015119 W KR2016015119 W KR 2016015119W WO 2017111509 A1 WO2017111509 A1 WO 2017111509A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steel sheet
- electrical steel
- grain
- oriented electrical
- weight
- Prior art date
Links
Classifications
-
- 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
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—Final recrystallisation annealing
-
- 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
- C21D8/1205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular fabrication or treatment of ingot or slab
-
- 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
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
-
- 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
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
- C21D8/1283—Application of a separating or insulating coating
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- 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
- C21D2201/00—Treatment for obtaining particular effects
- C21D2201/05—Grain orientation
-
- 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
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
-
- 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
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—Cold rolling
-
- 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
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1261—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest following hot rolling
Definitions
- It relates to a grain-oriented electrical steel sheet and a method of manufacturing the same.
- oriented electrical steel with excellent magnetic properties should have strong development of Goss texture in the ⁇ 110 ⁇ ⁇ 001> direction in the rolling direction of the steel sheet.
- An abnormal grain growth called recrystallization must be formed. This abnormal crystal growth occurs when normal grain growth, unlike normal grain growth, is suppressed by the movement of grain boundaries that normally grow by precipitates, inclusions, or elements that are dissolved or segregated at grain boundaries.
- the grain-oriented electrical steel mainly uses a method of producing secondary recrystallization using A1N, MnS, etc. as a grain growth inhibitor.
- the method for producing a grain-oriented electrical steel sheet using A1N and MnS precipitates as grain growth inhibitors has the following problems.
- A1N and MnS precipitates As grain growth inhibitors, the precipitates must be distributed very finely and uniformly on the steel sheet.
- the slab In order to uniformly distribute the fine precipitates, the slab is heated with high silver of 1300 ° C or more for a long time, the coarse precipitates existing in the steel are dissolved and then hot-rolled in a very fast time to perform hot rolling without precipitation. Rolling must be finished.
- A1203 is moved to the surface of the steel sheet and reacted with oxygen in the surface oxide layer to form A1203 oxide.
- the A1N oxide or A1N precipitates which are not decomposed in the annealing process formed in this way may interfere with the movement of magnetic domains in the steel sheet or near the surface, thereby causing deterioration of iron loss.
- One embodiment of the present invention to provide a grain-oriented electrical steel sheet.
- Another embodiment of the present invention is to provide a method for producing a grain-oriented electrical steel sheet.
- the grain-oriented electrical steel sheet according to an embodiment of the present invention in weight%, Si: 2.0 to 7.0%, C: 0.005% or less (excluding 0%), A1: 0.05% or less (excluding), ⁇ : 0 ⁇ 005% or less (excluding 0%), S: 0.005% or less (excluding 0%), Ba and Y alone or in combination thereof: 0.001 to 0.3% and the balance Fe and other unavoidable impurities .
- Mn may further comprise 0.005 to 0.5% by weight.
- It may further comprise 0.005 to 0.075% by weight of P.
- It may further comprise 0.005 to 0.35% by weight of Cr.
- Sb and Sn may each further comprise 0.005 to 0.2% by weight further alone or in combination thereof.
- an area ratio of grains having a size of less than lram may be 10% or less.
- the angle difference between the ⁇ 100> plane and the plate surface of the steel sheet may be 3.5 ° or less.
- the grain-oriented electrical steel sheet according to an embodiment of the present invention includes a holding steel sheet and a coating layer, and the holding steel sheet has a weight% of Si: 2.0 to 7.0%, C: 0.005% or less (except 0%), A1: 0.05 % Or less (except 0%), N: 0.005% or less (except 0%), 5: 0.0053 ⁇ 4> or less (except 03 ⁇ 4>), Ba and Y, alone or in combination thereof: 0.001 To 0.3% and the balance Fe and other unavoidable impurities, and comprises 0.001 to 0.1% by weight of A1 and 0.005 to 0.9% by weight of Mn in all the components including the base steel sheet and the coating layer.
- the steel sheet may further contain an amount of 0.005 to 0.5% by weight increase.
- the base steel sheet may further comprise P from 0.005 to 0.075 weight 3 ⁇ 4>.
- the steel sheet may further comprise 0.005 to 0.35 wt% Cr.
- the steel sheet may further comprise 0.005 to 0.2% by weight of Sb and Sn, alone or in combination thereof.
- the area ratio of the grains having a size of 1 mm or less may be 10% or less.
- the angle difference between the ⁇ 100> plane and the plate surface of the electrical steel sheet may be 3.5 ° or less.
- Ba, Y, or a combination thereof segregated at grain boundaries in the steel sheet.
- the slabs may comprise A1 at 0.005% by weight or less (excluding 0%).
- the slabs may further comprise N at 0.03 weight 3 ⁇ 4 or less (excluding 0%) and S at 0.03 weight% or less (excluding OT).
- the slab may further comprise 0.005 to 0.5% by weight of Mn.
- the slabs may further comprise 0.005 to 0.075 weight percent P.
- the slab may further comprise 0.005 to 0.35% by weight of Cr.
- the slab may further comprise 0.005 to 0.2% by weight of Sb and Sn, alone or in combination thereof.
- the slab In the step of heating the slab the slab may be heated to 1040 to 1280 ° C.
- the method may further include performing hot roll annealing.
- Primary recrystallization annealing can hold the cold rolled sheet at a temperature of at least 750 ° C for at least 30 seconds.
- the cracking temperature during the second recrystallization annealing may be 900 ° C to 1250 ° C.
- the steel sheet may comprise 140 to 500ppm N.
- the steel sheet may contain less than 50ppm N.
- the grain-oriented electrical steel sheet according to an embodiment of the present invention has low iron loss and excellent magnetic properties by stably forming a goth crystal grain.
- the manufacturing cost is reduced because no high temperature annealing is required to remove the precipitates such as A1N and MnS.
- first, second, and third are used to describe various parts, components, regions, layers and / or sections, but are not limited to these. These terms are only used to distinguish one part, component, region, layer or section from another part, component, region, layer or section. Accordingly, the first part, component, region, layer or section described below may be referred to as the second part, component, region, layer or section within the scope of the present invention.
- the grain-oriented electrical steel sheet according to an embodiment of the present invention in weight%, Si: 2.0 to 7.0%, C: 0.005% or less (except 0%), A1: 0.05% or less (except 0%), N: 0.005 to 0.05%, S: 0.0053 ⁇ 4> or less (excluding OT), Ba and Y, alone or in combination, respectively: 0.001 to 0.3% and the balance Fe and other unavoidable impurities.
- Barium (Ba) and yttrium (Y) act as a grain growth inhibitor to suppress the growth of grains in other orientations than goth grains during secondary recrystallization annealing, thereby improving the magnetic properties of the electrical steel sheet.
- Ba and Y may be added alone or in combination, respectively, and may include Ba and Y alone or in a total amount thereof: 0.001 to 0.3% by weight. If the content of Ba and Y is too low, it is difficult to exert sufficient restraining force, too much may increase the brittleness of the steel sheet may cause cracks during rolling.
- the content of B a and ⁇ means the content of Ba or Y when Ba and Y are added alone, and when Ba and Y are added in combination, the sum of the contents of Ba and Y (Ba + Y) is obtained. it means.
- Si is the basic composition of electrical steel sheet, which increases the specific resistance of the material, thereby reducing core loss (ie, core loss). Si may include 2.0 to 7.0% by weight increase. When the Si content is too small, the specific resistance decreases, the iron loss characteristics deteriorate, and when Si is excessively contained, the brittleness of the steel becomes large, and thus cold rolling may be difficult. Even if it is prepared by the diffusion method after powder coating or surface deposition, it does not exceed the scope of the present invention. More specifically Si may include 2.0 to 4.5% by weight.
- Carbon (C) is an austenite stabilizing element, and may be included in the slab in an amount of 0.005 to 0.1% by weight in the slab. It is possible to refine the coarse columnar tissue generated during the playing process and to suppress the Slab deep segregation of S. In addition, it is also possible to promote work hardening of the steel sheet during hot rolling to promote secondary recrystallization nucleation in the ⁇ 110 ⁇ ⁇ 001> orientation in the steel sheet. Too much C in the slab can lead to edge-cracking during hot rolling. In the manufacturing process is subjected to decarburization annealing, the C content in the final electrical steel sheet manufactured after decarburization annealing may be less than 0.005 weight 3 ⁇ 4. More specifically, 0.003 increment 3 ⁇ 4 It may be:
- A1N since A1N may not be used as a grain growth inhibitor, aluminum (A1) content can be actively suppressed. A1N can also be used simultaneously. Therefore, it may or may not contain A1. Ba and Y were able to further improve iron loss even when used simultaneously with the precipitate. Thus, Ba, and Y in an embodiment of the present invention, acts as a grain growth inhibitor with or replaced or A1N the A1N crystal grain growth inhibitor.
- the A1 content is 0.05 weight or less. More preferably A1 comprises 0.01% by weight or more and 04% by weight or less. In addition, in some cases, since A1 may not be used, A1 may be controlled to 0.005% by weight or less so that Al is hardly added.
- Nitrogen (N) forms precipitates such as AIN, (Al, Mn) N, (Al, Si, Mn) N, Si 3 N 4 and the like, and thus may be included in the slab in an amount of 0.03% by weight or less in the manufacturing method of the present invention.
- the slab may include 0.01 wt%, and the most preferable content is less than 0.005 wt%.
- the N content is low, the initial grain size before cold rolling has an effect of coarsening. Therefore, the number of grains having the ⁇ 110 ⁇ ⁇ 001> orientation in the primary recrystallization plate increases, thereby reducing the size of the secondary recrystallized grains, thereby reducing the magnetic properties of the final product.
- Nitrogen may be removed from the product version to include less than 0.005% by weight.
- the steel sheet manufacturing process may be added before the secondary recrystallization step to be described later, after the step of the well, the steel sheet may include N to 140 to 500ppm. However, nitrogen is removed in the second recrystallization annealing step, and after the second recrystallization annealing step, the steel sheet may include N of 50 ppm or less.
- Sulfur (S) is a high solubility silver and hot segregation element during hot rolling is not added in one embodiment of the present invention, or can be controlled to 0.005% by weight or less. In the manufacturing method, it may be included in the slab less than 0.03%, but is mostly removed from the product plate.
- the more preferable content in the slab is less than 0.01% by weight, it is best to include less than 0.005% by weight. However, this can be selected in terms of primary recrystallization control. More specifically, it may be 0.005% by weight or less in the product plate. More specifically, it may be 0.0015% by weight or less.
- Manganese (Mn) is a resistivity element that has the effect of improving magnetism, but if it contains too much, it causes phase transformation after secondary recrystallization, which adversely affects magnetism. When Mn is further included, the content of Mn is 0.005 to 5% by weight. Restrict. Phosphorus (P) promotes the growth of primary recrystallized grains in oriented electrical steel sheets of low temperature heating method, thereby increasing the secondary recrystallization temperature to increase the degree of integration of the ⁇ 110 ⁇ ⁇ 001> orientation in the final product.
- Phosphorus (P) promotes the growth of primary recrystallized grains in oriented electrical steel sheets of low temperature heating method, thereby increasing the secondary recrystallization temperature to increase the degree of integration of the ⁇ 110 ⁇ ⁇ 001> orientation in the final product.
- P not only lowers the iron loss of the final product by increasing the number of grains with the ⁇ 110 ⁇ ⁇ 001> orientation in the primary recrystallization plate, but also strongly develops the ⁇ 111 ⁇ ⁇ 112> texture in the primary recrystallization plate.
- the magnetic flux density is also increased.
- P segregates at grain boundaries to a high temperature of about 1000 ° C during secondary recrystallization annealing, and has a function of reinforcing the inhibitory force by delaying decomposition of precipitates.
- 0.005 to 0.075% by weight may be further included in the electrical steel sheet. At least 0.005% by weight is required for the above-described action to work properly.
- Chromium has a function of growing primary recrystallized grains as ferrite expansion elements, and increases grains of ⁇ 110 ⁇ ⁇ 001> orientation in the primary recrystallized sheet.
- Cr 0.005 to 0.35% by weight may be further included in the electrical steel sheet. The above action requires a 0.005 increase in% or more to function properly. If too many crems are added, a dense oxide layer is formed on the surface of the steel sheet during simultaneous decarburization and nitriding, which hinders the deposition. More specifically, Cr may contain 0.03 to 0.2% by weight.
- Antimony (Sb) and tin (Sn) are low temperature segregation elements and serve to assist the existing precipitates.
- Sb and Sn may each further comprise 0.005 to 0.2% by weight further alone or in combination thereof. Since Sb and Sn have a good influence on the improvement of the degree of integration, they may be included alone or in combination of 0.005% by weight or more alone or in combination thereof. However, limited to 0.2% by weight or less because it prevents decarburization when added excessively. More specifically, Sb and Sn may be further included, and Sb may further include 0.01 to 0.06% by weight, and Sn may further include 0.02 to 0.1% by weight.
- the components such as titanium (Ti), magnesium (Mg), and kale (Ca) are preferably not added because they react with oxygen in steel to form oxides. However, considering impurities in the steel, it can be controlled to 0.005% or less, respectively.
- the area ratio of the grains having a particle size of 1 ⁇ or less may be 10% or less with respect to the total grain area 10OT. If the area ratio of the grains having a particle size of 1 ⁇ or less is more than 10% with respect to 100% of the total grain area, the grains may not grow sufficiently and the magnetism may be degraded.
- the plate surface of a steel plate means XY surface, when the rolling direction of a steel plate is X axis
- Ba, Y, or a combination thereof may act as an inhibitor and segregate at grain boundaries.
- the grain-oriented electrical steel sheet according to an embodiment of the present invention includes a holding steel sheet and a coating layer, and the holding steel sheet has an increased% by weight of Si: 2.0 to 7.0%, C: 0.005% or less (excluding 0%), and A1: 0. 05% or less (except 0%), N: 0.005% or less (except 0%), Ba and Y alone or in combination thereof: 0.001 to 0.3% and the balance Fe and other unavoidable impurities
- A1 is 0.001 to 0.01 weight 3 ⁇ 4>
- Mn is 0.005 to 0.9 weight percent.
- the coating layer is formed on the base steel sheet.
- the composition of the coating layer is similar to that of the base steel sheet, but contains more A1 and Mn than the base steel sheet. Therefore, the total components including the base steel sheet and the coating layer will include 0.001 to 0.01 wt% of A1 and 0.005 to 0.9 wt% of Mn.
- Si 2.0 to 7.0%
- C 0.001 to O.
- Mn 0.005 to 0.5% Ba and Y, alone or in combination, respectively: heating a slab comprising 0.001 to 0.3% and the balance Fe and other unavoidable impurities; Hot rolling the slab to produce a hot rolled plate; Cold rolling the hot rolled sheet to produce a cold rolled sheet; Primary recrystallization annealing of the cold rolled sheet; And a second recrystallization annealing of the electrical steel sheet on which the first recrystallization annealing is completed.
- A1 in the slab may contain less than 0.05% by weight, or it may be extremely low to less than 0.005% by weight.
- the slab may further comprise less than 0.03% by weight of N and less than 0.3% by weight of S. More preferably, the slab may contain N of 0.005% by weight or less and S of 0.005% by weight or less.
- the heating temperature of the slab is not limited, but heating the slab to a temperature of 1280 ° C or less can prevent the growth of the slab columnar structure coarse to prevent the cracking of the plate in the hot rolling process. Therefore, the heating temperature of the slab may be more than 1000 ° C and less than 1280 ° C.
- hot rolling is performed.
- the hot rolling temperature or the cooling temperature is not limited, and in one embodiment, the hot rolling may be finished at a temperature of 950 ° C. or less, and then wound up to 600 ° C. or less.
- a hot rolled sheet having a thickness of 1.5 to 4.0 kPa can be produced.
- the hot rolled hot rolled sheet may be cold rolled without performing hot rolled sheet annealing or hot rolled sheet annealing as necessary. In the practice of the hot-rolled sheet annealing to make a hot-rolled tissue uniformly heating and cracking of at least 900 ° C temperature can then be cooled.
- Hot rolling is used to produce 0.1 to 0.5 mm cold rolled plate by using multiple reverse rolling methods including one rolling, multiple cold rolling, or intermediate annealing using a reverse rolling mill or a tandem rolling mill. can do. More specifically, it is possible to manufacture a cold rolled plate of 0.1 to 0.35 kPa.
- Cold rolled steel sheets are subjected to primary recrystallization annealing.
- primary recrystallization annealing primary recrystallization occurs in which decarburization and goth grain nuclei are generated.
- the primary recrystallization annealing can be to keep at least 30 seconds at a temperature of the cold-rolled sheet at least 750 ° C. If less than 750 ° C may not provide a sufficient energy for grain growth, less than 30 seconds grain growth may be unstable due to poor magnetism.
- the nitriding annealing step after the decarburization annealing can be omitted.
- nitride annealing is required to form A1N.
- A1N is not used as a grain growth inhibitor, a nitriding annealing process is not necessary.
- the steel sheet which has completed the first recrystallization annealing is coated with an annealing separator containing MgO and subjected to the second recrystallization annealing.
- the cracking temperature during the second recrystallization annealing may be 900 ° C to 1250 ° C. If it is less than 900 ° C goth grains may not be grown enough to decrease the magnetism, and when it exceeds 1250 ° C grains may grow coarse to deteriorate the characteristics of the electrical steel sheet.
- the nibble plate may comprise 50 to 500ppm N. More specifically, it may include 140 to 500ppm.
- the purification annealing process may be omitted.
- the steel sheet may contain less than 50ppm N.
- the slabs containing 0.0045% and the contents of barium (Ba) and yttrium (Y) were changed as shown in Table 1, and the remaining slabs containing Fe and other unavoidable impurities were heated at 1150 ° C for 210 minutes and hot-rolled to 2.6mm thickness.
- the hot rolled plate of was prepared.
- the hot rolled sheet was heated to 1090 ° C., maintained at 920 ° C. for 90 seconds, quenched with water, pickled, and hot rolled to a thickness of 0.262 mm.
- the first cracking temperature was 700 ° C
- the second cracking temperature was 120CTC
- the temperature raising condition of the temperature rising range was 15 ° C per hour in the temperature range of 700 to 1200 ° C.
- the cracking time at 1200 ° C was treated as 15 hours. Atmosphere during the final annealing were as heunhap atmosphere of nitrogen up to 1200 ° C 25% hydrogen + 75%, 1200 ° C is reached after furnace cooling was then held at 100% hydrogen atmosphere.
- the metal layer except for the coating layer in the product plate A1 content was 0.001%
- N content was 8ppm
- Table 1 The magnetic properties measured for each condition are summarized in Table 1 below.
- the non-oriented electrical steel sheet according to Comparative Material 1 and Inventive Material 8 has an exact Goss orientation fraction ( ⁇ 10 ° ) of 0.72% by volume, which is remarkable compared to 0.28% by volume of the exact Goss orientation fraction ( ⁇ 10 ° ) of the non-oriented electrical steel sheet by Comparative Material 1. It could be confirmed that the increase.
- the non-oriented electrical steel sheet according to Inventive Material 8 had a Goss orientation fraction ( ⁇ 15 ° ) of 1.62% by volume, which was remarkably higher than 1.04% by volume of Goss orientation fraction ( ⁇ 15 ° ) of the non-oriented electrical steel sheet by Comparative Material 1. It could be confirmed that the increase.
- the fraction of ⁇ 111 ⁇ ⁇ 112> ( ⁇ 15 ° ) was 12.8 volume 3 ⁇ 4, and the ⁇ 111 ⁇ ⁇ 112> ( ⁇ 15 ° of non-oriented electrical steel sheet according to Comparative Material 1 ) Fraction 13.
- the hot rolled sheet was heated to a temperature of more than 1,050 ° C and maintained at 910 ° C. for 90 seconds and pickled by boiling water. It was then cold rolled to a thickness of 0.262 mm. ⁇ The hot rolled steel plate is heated at a furnace speed, and then decarburized by maintaining it at 800 to 900 ° C for 120 seconds at a dew point temperature of 60 ° C, which is formed by simultaneously adding 50% hydrogen and 50% nitrogen. It was set as follows.
- MgO an annealing separator
- Finish-annealing was the atmosphere during the temperature increase up to 1,200 ° C in 25% heunhap atmosphere of nitrogen + 75% hydrogen, 1,200 ° C is reached after nonyaeng was then maintained for 20 hours in a 100% hydrogen atmosphere.
- Table 2 The magnetic properties measured at the decarburization temperature showing the best magnetism in the final product for each condition are summarized in Table 2 below.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/065,743 US10907231B2 (en) | 2015-12-22 | 2016-12-22 | Grain-oriented electrical steel sheet and manufacturing method therefor |
CN201680076953.3A CN108474079B (zh) | 2015-12-22 | 2016-12-22 | 取向电工钢板及其制造方法 |
EP16879376.8A EP3395976A4 (en) | 2015-12-22 | 2016-12-22 | Grain-oriented electrical steel sheet and manufacturing method therefor |
JP2018533197A JP6663999B2 (ja) | 2015-12-22 | 2016-12-22 | 方向性電磁鋼板及びその製造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150183796A KR102177523B1 (ko) | 2015-12-22 | 2015-12-22 | 방향성 전기강판 및 그 제조방법 |
KR10-2015-0183796 | 2015-12-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017111509A1 true WO2017111509A1 (ko) | 2017-06-29 |
Family
ID=59090829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2016/015119 WO2017111509A1 (ko) | 2015-12-22 | 2016-12-22 | 방향성 전기강판 및 그 제조방법 |
Country Status (6)
Country | Link |
---|---|
US (1) | US10907231B2 (ko) |
EP (1) | EP3395976A4 (ko) |
JP (1) | JP6663999B2 (ko) |
KR (1) | KR102177523B1 (ko) |
CN (1) | CN108474079B (ko) |
WO (1) | WO2017111509A1 (ko) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019131974A1 (ja) * | 2017-12-28 | 2019-07-04 | Jfeスチール株式会社 | 方向性電磁鋼板 |
US20220010402A1 (en) * | 2018-11-30 | 2022-01-13 | Posco | Grain-oriented electrical steel sheet and manufacturing method therefor |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102020276B1 (ko) * | 2017-12-26 | 2019-09-10 | 주식회사 포스코 | 방향성 전기강판 및 그의 제조방법 |
KR102142511B1 (ko) * | 2018-11-30 | 2020-08-07 | 주식회사 포스코 | 방향성 전기강판 및 그의 제조방법 |
BR112023014920A2 (pt) * | 2021-04-02 | 2023-10-31 | Nippon Steel Corp | Chapa de aço elétrico não orientado |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10324959A (ja) * | 1997-03-26 | 1998-12-08 | Kawasaki Steel Corp | 極めて鉄損の低い方向性電磁鋼板とその製造方法 |
JP2000204450A (ja) * | 1999-01-14 | 2000-07-25 | Nippon Steel Corp | 皮膜特性と磁気特性に優れた方向性電磁鋼板及びその製造方法 |
JP2004353036A (ja) * | 2003-05-29 | 2004-12-16 | Jfe Steel Kk | 磁気特性に優れた方向性電磁鋼板の製造方法 |
KR20090049611A (ko) * | 2006-11-22 | 2009-05-18 | 신닛뽄세이테쯔 카부시키카이샤 | 피막 밀착성이 우수한 일방향성 전자 강판 및 그 제조법 |
KR20150073551A (ko) * | 2013-12-23 | 2015-07-01 | 주식회사 포스코 | 방향성 전기강판 및 그 제조방법 |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0686630B2 (ja) | 1987-11-20 | 1994-11-02 | 新日本製鐵株式会社 | 磁束密度の高い一方向性珪素鋼板の製造方法 |
JPH0686631B2 (ja) | 1988-05-11 | 1994-11-02 | 新日本製鐵株式会社 | 磁束密度の高い一方向性電磁鋼板の製造方法 |
JP2782086B2 (ja) | 1989-05-29 | 1998-07-30 | 新日本製鐵株式会社 | 磁気特性、皮膜特性ともに優れた一方向性電磁鋼板の製造方法 |
JPH083125B2 (ja) | 1991-01-08 | 1996-01-17 | 新日本製鐵株式会社 | 磁束密度の高い方向性電磁鋼板の製造方法 |
JPH06100937A (ja) * | 1992-09-21 | 1994-04-12 | Nippon Steel Corp | グラス被膜を有しない極めて鉄損の優れた珪素鋼板の製造法 |
KR100347597B1 (ko) | 1995-12-28 | 2002-11-23 | 주식회사 포스코 | 고자속밀도방향성전기강판의제조방법 |
BR9800978A (pt) * | 1997-03-26 | 2000-05-16 | Kawasaki Steel Co | Chapas elétricas de aço com grão orientado tendo perda de ferro muito baixa e o processo de produção da mesma |
JPH1136018A (ja) | 1997-07-17 | 1999-02-09 | Nippon Steel Corp | グラス皮膜と磁気特性の極めて優れる方向性電磁鋼板の製造方法 |
KR100340550B1 (ko) | 1997-12-02 | 2002-07-18 | 이구택 | 피막특성이우수한고자속밀도방향성전기강판의제조방법 |
JP4123662B2 (ja) | 1999-12-03 | 2008-07-23 | Jfeスチール株式会社 | 小型電気機器用電磁鋼板およびその製造方法 |
EP1179603B1 (en) * | 2000-08-08 | 2011-03-23 | Nippon Steel Corporation | Method to produce grain-oriented electrical steel sheet having high magnetic flux density |
KR20020044243A (ko) * | 2000-12-05 | 2002-06-15 | 이구택 | 자기특성이 우수한 방향성 전기강판의 제조방법 |
JP2003193133A (ja) * | 2001-12-28 | 2003-07-09 | Jfe Steel Kk | 磁気特性および被膜特性に優れた方向性電磁鋼板の製造方法 |
JP2005264280A (ja) * | 2004-03-22 | 2005-09-29 | Jfe Steel Kk | 打ち抜き性及び耐被膜剥離性に優れた方向性電磁鋼板及びその製造方法 |
CN101180411B (zh) | 2005-05-23 | 2012-01-11 | 新日本制铁株式会社 | 被膜粘附性优异的取向电磁钢板及其制造方法 |
KR100721822B1 (ko) * | 2005-12-20 | 2007-05-28 | 주식회사 포스코 | 저철손 고자속밀도를 갖는 방향성 전기강판 제조방법 |
JP5748029B2 (ja) | 2012-09-27 | 2015-07-15 | Jfeスチール株式会社 | 方向性電磁鋼板の製造方法 |
JP6031951B2 (ja) * | 2012-11-09 | 2016-11-24 | Jfeスチール株式会社 | 方向性電磁鋼板およびその製造方法 |
KR101482354B1 (ko) * | 2012-12-27 | 2015-01-13 | 주식회사 포스코 | 철손이 우수한 방향성 전기강판 및 그 제조방법 |
KR101506677B1 (ko) | 2013-04-25 | 2015-03-27 | 주식회사 포스코 | 방향성 전기강판 및 그 제조방법 |
CN103525999A (zh) | 2013-09-13 | 2014-01-22 | 任振州 | 一种高磁感取向硅钢片的制备方法 |
KR101594598B1 (ko) * | 2013-12-23 | 2016-02-16 | 주식회사 포스코 | 방향성 전기강판 제조방법 |
KR101647655B1 (ko) * | 2014-12-15 | 2016-08-11 | 주식회사 포스코 | 방향성 전기강판 및 그 제조방법 |
-
2015
- 2015-12-22 KR KR1020150183796A patent/KR102177523B1/ko active IP Right Grant
-
2016
- 2016-12-22 JP JP2018533197A patent/JP6663999B2/ja active Active
- 2016-12-22 CN CN201680076953.3A patent/CN108474079B/zh active Active
- 2016-12-22 WO PCT/KR2016/015119 patent/WO2017111509A1/ko active Application Filing
- 2016-12-22 US US16/065,743 patent/US10907231B2/en active Active
- 2016-12-22 EP EP16879376.8A patent/EP3395976A4/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10324959A (ja) * | 1997-03-26 | 1998-12-08 | Kawasaki Steel Corp | 極めて鉄損の低い方向性電磁鋼板とその製造方法 |
JP2000204450A (ja) * | 1999-01-14 | 2000-07-25 | Nippon Steel Corp | 皮膜特性と磁気特性に優れた方向性電磁鋼板及びその製造方法 |
JP2004353036A (ja) * | 2003-05-29 | 2004-12-16 | Jfe Steel Kk | 磁気特性に優れた方向性電磁鋼板の製造方法 |
KR20090049611A (ko) * | 2006-11-22 | 2009-05-18 | 신닛뽄세이테쯔 카부시키카이샤 | 피막 밀착성이 우수한 일방향성 전자 강판 및 그 제조법 |
KR20150073551A (ko) * | 2013-12-23 | 2015-07-01 | 주식회사 포스코 | 방향성 전기강판 및 그 제조방법 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019131974A1 (ja) * | 2017-12-28 | 2019-07-04 | Jfeスチール株式会社 | 方向性電磁鋼板 |
US11525174B2 (en) | 2017-12-28 | 2022-12-13 | Jfe Steel Corporation | Grain-oriented electrical steel sheet |
US20220010402A1 (en) * | 2018-11-30 | 2022-01-13 | Posco | Grain-oriented electrical steel sheet and manufacturing method therefor |
Also Published As
Publication number | Publication date |
---|---|
US20190024202A1 (en) | 2019-01-24 |
EP3395976A4 (en) | 2018-12-26 |
JP6663999B2 (ja) | 2020-03-13 |
US10907231B2 (en) | 2021-02-02 |
KR102177523B1 (ko) | 2020-11-11 |
KR20170074478A (ko) | 2017-06-30 |
CN108474079B (zh) | 2021-06-15 |
CN108474079A (zh) | 2018-08-31 |
JP2019506526A (ja) | 2019-03-07 |
EP3395976A1 (en) | 2018-10-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107109508B (zh) | 取向电工钢板及其制造方法 | |
KR101899453B1 (ko) | 방향성 전기강판의 제조방법 | |
KR101351956B1 (ko) | 자성이 우수한 방향성 전기강판 및 그 제조방법 | |
WO2017111509A1 (ko) | 방향성 전기강판 및 그 제조방법 | |
WO2016098917A1 (ko) | 방향성 전기강판 및 그 제조방법 | |
KR101707451B1 (ko) | 방향성 전기강판 및 그 제조방법 | |
CN113166836A (zh) | 取向电工钢板及其制造方法 | |
WO2017111547A1 (ko) | 방향성 전기강판 및 이의 제조방법 | |
KR20200076517A (ko) | 방향성의 전기강판 및 그 제조 방법 | |
KR101919521B1 (ko) | 방향성 전기강판 및 이의 제조방법 | |
KR20190077890A (ko) | 방향성 전기강판 및 그의 제조방법 | |
KR101506679B1 (ko) | 방향성 전기강판 및 그 제조방법 | |
KR102088405B1 (ko) | 방향성 전기강판 제조방법 | |
KR101308729B1 (ko) | 자성과 생산성이 우수한 방향성 전기강판의 제조방법 | |
JP2019116680A (ja) | 方向性電磁鋼板用スラブ、方向性電磁鋼板およびその製造方法 | |
CN114829657B (zh) | 取向电工钢板及其制造方法 | |
KR101697988B1 (ko) | 방향성 전기강판 및 이의 제조방법 | |
KR101667617B1 (ko) | 방향성 전기강판 및 그 제조방법 | |
KR101351955B1 (ko) | 자성이 우수한 방향성 전기강판 및 그 제조방법 | |
KR101351957B1 (ko) | 자성이 우수한 방향성 전기강판 및 이의 제조방법 | |
KR102438480B1 (ko) | 방향성 전기강판의 제조방법 | |
KR102319831B1 (ko) | 방향성 전기강판의 제조방법 | |
KR102176348B1 (ko) | 방향성 전기강판 및 그의 제조방법 | |
KR101263841B1 (ko) | 저철손 고자속밀도 방향성 전기강판의 제조방법 | |
KR102020276B1 (ko) | 방향성 전기강판 및 그의 제조방법 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16879376 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2018533197 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2016879376 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2016879376 Country of ref document: EP Effective date: 20180723 |