WO2012029621A1 - 無方向性電磁鋼板の製造方法 - Google Patents
無方向性電磁鋼板の製造方法 Download PDFInfo
- Publication number
- WO2012029621A1 WO2012029621A1 PCT/JP2011/069136 JP2011069136W WO2012029621A1 WO 2012029621 A1 WO2012029621 A1 WO 2012029621A1 JP 2011069136 W JP2011069136 W JP 2011069136W WO 2012029621 A1 WO2012029621 A1 WO 2012029621A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- steel sheet
- less
- annealing
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- 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
- C21D8/1244—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
- C21D8/1255—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 with diffusion of elements, e.g. decarburising, nitriding
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- 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
- C22C38/02—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
- 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
Definitions
- the present invention relates to a method for producing a non-oriented electrical steel sheet, and more particularly to a method for producing a non-oriented electrical steel sheet having excellent magnetic flux density in the steel sheet rolling direction.
- non-oriented electrical steel sheets have conventionally been made to optimize the alloy elements to be added, further increase the crystal grain size before cold rolling, and optimize the cold rolling reduction ratio. While increasing the magnetic flux density by, for example, reducing the iron loss by adding an electric resistance increasing element or reducing the plate thickness.
- a split core is adopted from the viewpoint of improving the yield.
- This split core is not punched as a single piece from the raw steel plate as in the past, but the core is split into several parts and punched so that the length direction of the teeth of each part is the rolling direction of the steel sheet. Assemble the core.
- the length direction of the teeth where the magnetic flux concentrates is the rolling direction of the electrical steel sheet. Therefore, in order to improve the characteristics of the motor, the characteristics in the rolling direction of the electrical steel sheet are extremely important.
- Examples of the material having an increased magnetic flux density in the rolling direction include grain-oriented electrical steel sheets in which the Goss orientation is aligned in the rolling direction.
- the grain-oriented electrical steel sheet is manufactured through a secondary recrystallization process, the manufacturing cost is high, and the fact is that it is hardly adopted for the split core. Therefore, in an inexpensive non-oriented electrical steel sheet, if the magnetic flux density in the rolling direction can be improved, it can be considered that it can be an optimum material for the split core.
- Patent Document 1 discloses a technique that meets such a requirement: C: 0.002 mass% or less, Si: 0.1 mass% or more and less than 0.8 mass%, Al: 0.3 to 2.0 mass%, A steel containing Mn: 0.1 to 1.5 mass% and Si + 2Al-Mn: 2% or more is hot-rolled and then subjected to hot-rolled sheet annealing to an average crystal grain size of 300 ⁇ m or more.
- a method for producing a non-oriented electrical steel sheet is disclosed in which rolling is performed at a rolling reduction of 85 to 95% to obtain a final thickness, and finish annealing is performed at 700 to 950 ° C. for 10 seconds to 1 minute.
- Patent Document 2 discloses that after hot-rolled sheets containing C: 0.005 mass% or less, Si: 2 to 4 mass%, Al: more than 1 mass% and 2 mass% or less, cold rolling is performed once. Then, by performing recrystallization annealing, the recrystallized structure has an average crystal grain size of 40 to 200 ⁇ m, and the magnetic flux density B 50 in the rolling direction (L direction) and 90 ° direction (C direction) ( C), the magnetic flux density B 50 (X) and the sheet thickness t (mm) in the rolling direction (L direction) and the 45 ° direction (X direction) are as follows: Plate thickness having magnetic properties satisfying B 50 (C) / B 50 (X) ⁇ ⁇ 0.5333 ⁇ t 2 + 0.3907 ⁇ t + 0.945: non-directional electromagnetic for split core of 0.15 to 0.3 mm A steel sheet is disclosed.
- Patent Document 1 by controlling the grain size after hot-rolled sheet annealing and the cold rolling reduction ratio, an electrical steel sheet having excellent magnetic properties in the rolling direction and in the vertical direction in the plate surface is obtained. be able to.
- a high temperature eg 1000 to 1050 ° C.
- the method of Patent Document 2 requires that the hot-rolled sheet annealing temperature be high (above 900 ° C. and 920 to 1100 ° C. is exemplified), and a large amount of Al needs to be added. There is a problem in terms.
- the present invention has been made in view of the above-mentioned problems of the prior art, and its purpose is to propose an advantageous method for producing a non-oriented electrical steel sheet capable of remarkably increasing the magnetic flux density in the steel sheet rolling direction. There is to do.
- the inventors have intensively studied to solve the above problems. As a result, the magnetic properties in the rolling direction of the steel sheet are remarkably improved by heating the cold-rolled steel sheet containing a proper amount of C or more and rolled to the final sheet thickness at a higher speed than the temperature increase rate in the conventional finish annealing. As a result, the present invention has been completed.
- the present invention includes C: 0.01 to 0.1 mass%, Si: 4 mass% or less, Mn: 0.05 to 3 mass%, Al: 3 mass% or less, S: 0.005 mass% or less, N: 0.00.
- the average rate of temperature increase during heating is 100 ° C. / This is a method for producing a non-oriented electrical steel sheet, which is subjected to finish annealing at a temperature of 750 to 1100 ° C. for at least sec.
- the steel slab used in the production method of the present invention preferably further contains 0.005 to 0.1 mass% of any one or two of Sn and Sb.
- the production method of the present invention is preferably decarburized and annealed after the finish annealing.
- a non-oriented electrical steel sheet having excellent magnetic properties in the steel sheet rolling direction can be provided. Therefore, the steel sheet of the present invention greatly contributes to improving the efficiency of motors and transformers by being applied to applications that require excellent magnetic properties in the rolling direction, such as split cores and transformer cores.
- FIG. 3 is a graph showing the influence of a temperature increase rate (horizontal axis: ° C./sec) in finish annealing on a magnetic flux density B 50-L (vertical axis: T) in a rolling direction. It is a graph which shows the influence which C content (horizontal axis: mass%) has on magnetic flux density B 50-L (vertical axis: T) in the rolling direction.
- a cold-rolled sheet having a final sheet thickness of 0.35 mm is obtained by one cold rolling, and then this cold-rolled sheet is directly energized. Heating is performed in a heating furnace while changing the heating rate in the range of 30 to 300 ° C / sec. After finishing annealing at 900 ° C x 10 sec, decarburization annealing at 850 ° C x 30 sec in an atmosphere with a dew point of 30 ° C And nothing Tropism electromagnetic steel sheet was prepared.
- C is contained in the range of 0.005 to 0.5 mass%, Si: 3.3 mass%, Mn: 0.15 mass%
- a steel slab containing Al: 0.001 mass%, N: 0.0022 mass%, and S: 0.0013 mass% is heated at 1100 ° C. for 30 minutes, and then hot-rolled to form a hot-rolled sheet having a thickness of 2.3 mm. After subjecting to 1000 ° C. ⁇ 30 sec. Hot rolling annealing, a cold rolling with a final thickness of 0.35 mm is performed by one cold rolling, and then this cold rolling plate is heated in a direct current heating furnace.
- a non-oriented electrical steel sheet heated at a rate of 20 ° C./sec and 300 ° C./sec, subjected to finish annealing at 950 ° C. ⁇ 10 sec, and then subjected to decarburization annealing at 850 ° C. ⁇ 30 sec in an atmosphere with a dew point of 30 ° C. was made.
- a test piece having a rolling direction (L direction): 180 mm ⁇ a perpendicular direction of rolling (C direction): 30 mm was sampled in the same manner as the above experiment, and the magnetic flux in the L direction was collected.
- the density B 50-L was measured, and the result is shown in FIG. FIG. 2 shows that the magnetic flux density in the rolling direction can be increased by heating a cold-rolled sheet containing 0.01 mass% or more of C at a heating rate of 100 ° C./sec or more and performing finish annealing.
- C 0.01 to 0.1 mass% C dissolved in the steel adheres to the dislocations introduced during cold rolling and facilitates the formation of deformation bands.
- This deformation band has the effect of improving the magnetic properties in the rolling direction because the Goss orientation ⁇ 110 ⁇ ⁇ 001> is preferentially grown by recrystallization during finish annealing.
- the C content in the steel sheet before cold rolling needs to be 0.01 mass% or more.
- C is set in the range of 0.01 to 0.1 mass%. Preferably, it is in the range of 0.015 to 0.05 mass%. A more preferred lower limit is 0.02 mass%.
- the decarburization annealing may be performed at any time after rapid heating.
- Si 4 mass% or less Si is an element added to increase the specific resistance of steel and improve iron loss characteristics. To obtain such an effect, it is preferable to add 1.0 mass% or more. . On the other hand, addition exceeding 4 mass% hardens the steel and makes it difficult to roll, so the upper limit is made 4 mass%. Preferably, it is in the range of 1.0 to 4.0 mass%. A more preferred lower limit is 1.5 mass%.
- Mn 0.05-3 mass%
- Mn is an element necessary for preventing cracking in hot rolling due to S, and in order to obtain such an effect, addition of 0.05 mass% or more is necessary.
- addition exceeding 3 mass% causes an increase in raw material cost. Therefore, Mn is set to a range of 0.05 to 3 mass%.
- a more preferable upper limit is 2.5 mass%.
- Mn increases the specific resistance, so when further reducing the iron loss, it is preferably 1.5 mass% or more, and when workability and manufacturability are more important, it is 2.0 mass% or less. It is preferable that
- Al 3 mass% or less
- Al like Si, has the effect of increasing the specific resistance of steel and improving the iron loss characteristics, so is an element added as necessary. However, addition exceeding 3 mass% lowers the rollability, so the upper limit is made 3 mass%. More preferably, it is 2.5 mass% or less. Further, Al is preferably 1.0 mass% or more when the iron loss is more important, and 2.0 mass% or less when the workability and manufacturability are more important. In addition, although addition of Al is not essential, even if it is not added, a small amount is usually present as an inevitable impurity.
- S and N are impurity elements that are inevitably mixed in the steel, and when they exceed 0.005 mass%, the magnetic properties are deteriorated. Therefore, in the present invention, S and N are limited to 0.005 mass% or less, respectively.
- the non-oriented electrical steel sheet of the present invention may contain Sn and Sb in the following ranges in addition to the essential components.
- Sn 0.005 to 0.1 mass%
- Sb 0.005 to 0.1 mass%
- Sn and Sb not only improve the texture after finish annealing to improve the magnetic flux density in the rolling direction, but also prevent oxidation and nitridation of the steel sheet surface layer and suppress the formation of fine grains on the steel sheet surface layer, and magnetic properties It is an element that has the effect of preventing the decrease in the amount. In order to express such an effect, it is preferable to add 0.005 mass% or more of any one or two of Sn and Sb.
- Sn and Sb are preferably added in the range of 0.005 to 0.1 mass%, respectively.
- the balance other than the above components is Fe and inevitable impurities.
- it does not refuse to contain elements other than the above components and to contain the above-mentioned optional additive components as impurities as less than the above lower limit amount.
- the method for producing a non-oriented electrical steel sheet according to the present invention is a method in which a steel having the above-mentioned component composition suitable for the present invention is melted by a generally known refining process using a converter, an electric furnace, a vacuum degassing apparatus, etc.
- the steel slab is made into a steel slab by a casting method or ingot-bundling rolling method, and this steel slab is hot-rolled by a generally known method, hot-rolled sheet annealing is carried out if necessary, and cold-rolled to cold-roll the final sheet thickness.
- a plate it is preferable to use a plate, then finish annealing, decarburization annealing, and further deposit various insulating films as necessary to obtain products.
- this manufacturing method until cold rolling, there is no restriction
- the hot-rolled sheet annealing does not need to be performed at a high temperature, and a temperature of about 850 to 1000 ° C. is sufficient. However, hot-rolled sheet annealing outside this range is not excluded.
- Cold rolling Cold rolling may be performed as cold rolling twice or more with one cold rolling or intermediate annealing.
- introduction of a deformation zone will be ensured by setting it as the component composition mentioned above.
- Finish annealing As for the temperature increase rate of finish annealing, it is necessary to heat from 300 ° C. to 800 ° C. at 100 ° C./sec or more. This is because a texture with a (111) orientation unfavorable for magnetic properties develops at a heating rate of less than 100 ° C./sec. Preferably it is 200 degrees C / sec or more. Although the upper limit is not particularly defined, a temperature of about 500 ° C./sec or less is practical. The soaking temperature needs to be in the range of 750 to 1100 ° C. This is because the lower limit temperature may be a temperature equal to or higher than the recrystallization temperature, but is necessary to be 750 ° C.
- the soaking temperature exceeds 1100 ° C.
- the recrystallized grains become coarse and the load on the annealing furnace increases, which is not preferable.
- it is in the range of 800 to 1050 ° C.
- the soaking time may be a time during which recrystallization proceeds sufficiently, and for example, 5 sec or more can be used as a guide.
- the effect will be saturated if it exceeds 120 sec, it is preferable to set it as 120 sec or less.
- the cooling conditions after annealing what is necessary is just a normal condition, and there is no restriction
- the method of setting the temperature increase rate at the time of the said finish annealing heating to 100 degrees C / sec or more For example, a direct current heating method or a dielectric heating method can be used suitably.
- Decarburization annealing The steel sheet subjected to the finish annealing is preferably decarburized and annealed to reduce the amount of dissolved C and prevent magnetic aging, so that C in steel is preferably reduced to 0.0050 mass% or less. This is because if the C content exceeds 0.0050 mass%, the product steel plate may cause magnetic aging.
- Conditions for this decarburization annealing may be generally known conditions.
- the decarburization annealing may be performed under conditions of 800 to 850 ° C. ⁇ 10 to 30 sec in an oxidizing atmosphere with a dew point of 30 ° C. or higher.
- the decarburization annealing may be performed continuously following the finish annealing, or may be performed separately in another line.
- the steel sheet after decarburization annealing is then preferably used as a product by forming various insulating coatings as necessary.
- a non-oriented electrical steel sheet having excellent magnetic properties in the steel sheet rolling direction can be provided. Therefore, the steel sheet of the present invention greatly contributes to improving the efficiency of motors and transformers by being applied to applications that require excellent magnetic properties in the rolling direction, such as split cores and transformer cores.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Description
B50(C)/B50(X)≧-0.5333×t2+0.3907×t+0.945を満たす磁気特性を有する板厚:0.15~0.3mmの分割コア用無方向性電磁鋼板が開示されている。
仕上焼鈍加熱時の昇温速度が鋼板圧延方向の磁束密度に及ぼす影響を調査するため、C:0.0025mass%および0.02mass%を含有し、さらにSi:3.3mass%、Mn:0.1mass%、Al:0.001mass%、N:0.0019mass%、S:0.0010mass%を基本成分組成とする鋼スラブを1100℃で30分加熱後、熱間圧延して板厚2.6mmの熱延板とし、1000℃×30secの熱延板焼鈍を施した後、1回の冷間圧延で最終板厚が0.35mmの冷延板とし、その後、この冷延板を、直接通電加熱炉で昇温速度を30~300℃/secの範囲で変化させて加熱し、900℃×10secの仕上焼鈍を施した後、露点が30℃の雰囲気中で850℃×30secの脱炭焼鈍を施し、無方向性電磁鋼板を作製した。
本発明は、上記知見にさらに検討を加えてなされたものである。
C:0.01~0.1mass%
鋼中に固溶したCは、冷間圧延時に導入された転位を固着し変形帯を形成しやすくする。この変形帯は、仕上焼鈍時の再結晶によってGoss方位{110}<001>を優先的に成長させるため、圧延方向の磁気特性を向上する効果がある。この固溶Cの効果を得るためには、冷間圧延前の鋼板中のC含有量は0.01mass%以上としておくことが必要である。一方、製品鋼板中の固溶Cが多いと、磁気時効を起こして磁気特性を劣化させるため、冷間圧延後の焼鈍工程で脱炭し、Cを0.005mass%以下に低減する必要があるが、鋼中Cが0.1mass%を超えると、上記脱炭焼鈍で十分に脱炭できないおそれがある。よって、Cは0.01~0.1mass%の範囲とする。好ましくは、0.015~0.05mass%の範囲である。より好ましい下限は、0.02mass%である。なお、脱炭焼鈍は、急速加熱後であれば、何時行っても構わない。
Siは、鋼の固有抵抗を高めて、鉄損特性を改善するために添加される元素であり、斯かる効果を得るためには、1.0mass%以上添加することが好ましい。一方、4mass%を超える添加は、鋼を硬質化し、圧延することを困難とするので、上限は4mass%とする。好ましくは、1.0~4.0mass%の範囲である。より好ましい下限は、1.5mass%である。
Mnは、Sに起因する熱間圧延での割れを防止するために必要な元素であり、斯かる効果を得るためには、0.05mass%以上の添加が必要である。一方、3mass%を超える添加は、原料コストの上昇を招く。よって、Mnは、0.05~3mass%の範囲とする。より好ましい上限は、2.5mass%である。なお、Mnは、固有抵抗を上昇させるため、さらなる低鉄損化を図る場合には1.5mass%以上とするのが好ましく、加工性、製造性をより重視する場合には2.0mass%以下とするのが好ましい。
Alは、Siと同様、鋼の固有抵抗を高めて、鉄損特性を改善する効果があるので、必要に応じて添加する元素である。しかし、3mass%を超える添加は、圧延性を低下させるので、上限は3mass%とする。より好ましくは2.5mass%以下である。また、Alは、鉄損をより重視する場合は1.0mass%以上、加工性、製造性をより重視する場合は2.0mass%以下とすることが好ましい。なお、Alの添加は、必須ではないが、添加しない場合でも、通常、不可避的不純物として少量存在する。
SおよびNは、鋼中に不可避的に混入してくる不純物元素であり、それぞれ0.005mass%を超えると磁気特性を劣化させる。よって、本発明においては、S,Nはそれぞれ0.005mass%以下に制限する。
Sn:0.005~0.1mass%、Sb:0.005~0.1mass%
SnおよびSbは、仕上焼鈍後の集合組織を改善して圧延方向の磁束密度を向上させるだけでなく、鋼板表層の酸化や窒化を防止して鋼板表層の微細粒の生成を抑制し、磁気特性の低下を防止する効果のある元素である。かかる効果を発現させるには、SnおよびSbいずれか1種または2種を0.005mass%以上添加するのが好ましい。しかし、それらの元素の含有量が、いずれも0.1mass%を超えると、結晶粒の成長が阻害され、却って磁気特性の劣化を招くおそれがある。よって、SnおよびSbは、それぞれ0.005~0.1mass%の範囲で添加するのが好ましい。
本発明の無方向性電磁鋼板の製造方法は、本発明に適合する上記成分組成を有する鋼を転炉や電気炉、真空脱ガス装置等を用いた通常公知の精錬プロセスで溶製し、連続鋳造法あるいは造塊-分塊圧延法で鋼スラブとし、この鋼スラブを通常公知の方法で熱間圧延し、必要に応じて熱延板焼鈍し、冷間圧延して最終板厚の冷延板とし、その後、仕上焼鈍し、脱炭焼鈍し、さらに必要に応じて各種の絶縁被膜を被成し、製品とする方法が好ましい。なお、この製造方法において、冷間圧延までは、素材成分組成を本発明の成分組成に適合させること以外に特に制限はなく、通常公知の製造プロセスを採用することができる。また、上記熱延板焼鈍は、高温で行う必要は無く、850~1000℃程度で充分であるが、この範囲外での熱延板焼鈍を除外するものではない。
冷間圧延
冷間圧延は、1回の冷間圧延または中間焼鈍を挟む2回以上の冷間圧延としてもよい。なお、無方向性電磁鋼板の製造における通常の圧下率(約50%以上)であれば、上述した成分組成とすることにより、変形帯の導入は確保される。
仕上焼鈍の昇温速度は、300℃から800℃までを100℃/sec以上で加熱することが必要である。100℃/sec未満の昇温速度では、磁気特性に好ましくない(111)方位の集合組織が発達するからである。好ましくは200℃/sec以上である。上限は特に定めないが、500℃/sec程度以下が実用的である。
また、均熱温度は、750~1100℃の範囲とする必要がある。下限温度は、再結晶温度以上の温度であればよいが、連続焼鈍で十分な再結晶を起こさせるためには750℃以上とする必要があるからである。一方、均熱温度が1100℃を超えると、再結晶粒が粗大化したり、焼鈍炉の負荷が大きくなったりするので好ましくない。好ましくは800~1050℃の範囲である。
なお、焼鈍後の冷却条件については、通常の条件であればよく、特に制限はない。また、上記仕上焼鈍加熱時の昇温速度を100℃/sec以上とする方法についても、特に制限はなく、例えば、直接通電加熱法あるいは誘電加熱法などを好適に用いることができる。
上記仕上焼鈍した鋼板は、その後、脱炭焼鈍して、固溶C量を低減して磁気時効を防止するため、鋼中Cを0.0050mass%以下に低減するのが好ましい。C量が0.0050mass%超えでは、製品鋼板が磁気時効を起こすおそれがあるからである。この脱炭焼鈍の条件は、通常公知の条件でよく、例えば、露点を30℃以上とした酸化性雰囲気下で、800~850℃×10~30secの条件で行うことができる。
なお、この脱炭焼鈍は、仕上焼鈍に引き続いて連続的に行っても、あるいは、別途、他のラインで行ってもよい。脱炭焼鈍後の鋼板は、その後、必要に応じて各種の絶縁被膜を形成し、製品とするのが好ましい。
Claims (3)
- C:0.01~0.1mass%、Si:4mass%以下、Mn:0.05~3mass%、Al:3mass%以下、S:0.005mass%以下、N:0.005mass%以下、残部がFeおよび不可避的不純物からなる鋼スラブを熱間圧延し、冷間圧延し、仕上焼鈍する無方向性電磁鋼板の製造方法において、加熱時の平均昇温速度を100℃/sec以上とし、均熱温度を750~1100℃の温度域とする仕上焼鈍を施す、無方向性電磁鋼板の製造方法。
- 上記鋼スラブは、さらに、SnおよびSbのうちのいずれか1種または2種をそれぞれ0.005~0.1mass%以下含有する請求項1に記載の無方向性電磁鋼板の製造方法。
- 上記仕上焼鈍後、脱炭焼鈍する請求項1または2に記載の無方向性電磁鋼板の製造方法。
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011800294122A CN102959099A (zh) | 2010-08-30 | 2011-08-25 | 无方向性电磁钢板的制造方法 |
| EP11821638.1A EP2612933B1 (en) | 2010-08-30 | 2011-08-25 | Method of producing a non-oriented electrical steel sheet |
| RU2013114304/02A RU2529258C1 (ru) | 2010-08-30 | 2011-08-25 | Способ получения листа из неориентированной электротехнической стали |
| BR112013004506-0A BR112013004506B1 (pt) | 2010-08-30 | 2011-08-25 | Método para produção de chapa de aço elétrico de grão não orientado |
| US13/812,430 US20130146187A1 (en) | 2010-08-30 | 2011-08-25 | Method of producing non-oriented electrical steel sheet |
| KR1020137004831A KR101499371B1 (ko) | 2010-08-30 | 2011-08-25 | 무방향성 전기 강판의 제조 방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010191714A JP5854182B2 (ja) | 2010-08-30 | 2010-08-30 | 無方向性電磁鋼板の製造方法 |
| JP2010-191714 | 2010-08-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012029621A1 true WO2012029621A1 (ja) | 2012-03-08 |
Family
ID=45772713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2011/069136 Ceased WO2012029621A1 (ja) | 2010-08-30 | 2011-08-25 | 無方向性電磁鋼板の製造方法 |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20130146187A1 (ja) |
| EP (1) | EP2612933B1 (ja) |
| JP (1) | JP5854182B2 (ja) |
| KR (1) | KR101499371B1 (ja) |
| CN (1) | CN102959099A (ja) |
| BR (1) | BR112013004506B1 (ja) |
| RU (1) | RU2529258C1 (ja) |
| TW (1) | TWI481724B (ja) |
| WO (1) | WO2012029621A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014129034A1 (ja) * | 2013-02-21 | 2014-08-28 | Jfeスチール株式会社 | 磁気特性に優れるセミプロセス無方向性電磁鋼板の製造方法 |
| US9920393B2 (en) | 2012-03-15 | 2018-03-20 | Jfe Steel Corporation | Method of producing non-oriented electrical steel sheet |
| WO2019182022A1 (ja) | 2018-03-23 | 2019-09-26 | 日本製鉄株式会社 | 無方向性電磁鋼板 |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5825494B2 (ja) * | 2013-03-06 | 2015-12-02 | Jfeスチール株式会社 | 無方向性電磁鋼板およびその製造方法 |
| KR101594393B1 (ko) * | 2013-09-11 | 2016-02-16 | 금오공과대학교 산학협력단 | 비대칭압연에 의한 goss 집합조직을 가지는 전기강판의 제조방법 |
| JP6048699B2 (ja) | 2015-02-18 | 2016-12-21 | Jfeスチール株式会社 | 無方向性電磁鋼板とその製造方法ならびにモータコア |
| US10316382B2 (en) * | 2015-02-24 | 2019-06-11 | Jfe Steel Corporation | Method for producing non-oriented electrical steel sheets |
| WO2017022360A1 (ja) * | 2015-08-04 | 2017-02-09 | Jfeスチール株式会社 | 磁気特性に優れる無方向性電磁鋼板の製造方法 |
| JP6402865B2 (ja) * | 2015-11-20 | 2018-10-10 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
| WO2017086036A1 (ja) * | 2015-11-20 | 2017-05-26 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
| JP6406522B2 (ja) * | 2015-12-09 | 2018-10-17 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
| CN106048173A (zh) * | 2016-07-20 | 2016-10-26 | 柳州科尔特锻造机械有限公司 | 一种合金钢的热处理方法 |
| JP6866696B2 (ja) * | 2017-03-07 | 2021-04-28 | 日本製鉄株式会社 | 無方向性電磁鋼板およびその製造方法、並びにモータコアおよびその製造方法 |
| KR102108231B1 (ko) | 2017-12-26 | 2020-05-07 | 주식회사 포스코 | 무방향성 전기강판 및 그 제조방법 |
| CN108411205B (zh) * | 2018-04-09 | 2019-07-09 | 内蒙古工业大学 | Csp流程生产高磁感低铁损无取向电工钢的方法 |
| CN108504952B (zh) * | 2018-04-09 | 2019-06-25 | 内蒙古工业大学 | 薄板坯连铸连轧生产新能源汽车用无取向电工钢的方法 |
| CN108504926B (zh) * | 2018-04-09 | 2019-06-21 | 内蒙古工业大学 | 新能源汽车用无取向电工钢及其生产方法 |
| EP4039832A4 (en) | 2019-10-03 | 2023-03-08 | JFE Steel Corporation | NON-ALIGNED ELECTROMAGNETIC STEEL SHEET AND METHOD OF MANUFACTURE THEREOF |
| CN114000045B (zh) * | 2020-07-28 | 2022-09-16 | 宝山钢铁股份有限公司 | 一种磁性能优良的高强度无取向电工钢板及其制造方法 |
| DE102023205765A1 (de) * | 2023-06-20 | 2024-12-24 | Sms Group Gmbh | Verfahren und Vorrichtung zum Herstellen von Nicht-Korn-Orientiertem Elektroband |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0211728A (ja) * | 1988-03-25 | 1990-01-16 | Armco Advanced Materials Corp | 無配向性電気鉄板の超高速焼なまし |
| JPH04346621A (ja) * | 1991-05-21 | 1992-12-02 | Kawasaki Steel Corp | 磁気特性が優れかつ表面外観の良い無方向性電磁鋼板の製造方法 |
| JPH055126A (ja) * | 1991-03-15 | 1993-01-14 | Sumitomo Metal Ind Ltd | 無方向性電磁鋼板の製造方法 |
| JPH05171291A (ja) * | 1991-06-26 | 1993-07-09 | Nippon Steel Corp | 磁気特性に優れた無方向性電磁鋼板の製造方法 |
| JP2004332042A (ja) | 2003-05-07 | 2004-11-25 | Nippon Steel Corp | 圧延方向とその板面内垂直方向磁気特性の優れた無方向性電磁鋼板の製造方法 |
| JP2008127600A (ja) | 2006-11-17 | 2008-06-05 | Nippon Steel Corp | 分割コア用無方向性電磁鋼板 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4898626A (en) * | 1988-03-25 | 1990-02-06 | Armco Advanced Materials Corporation | Ultra-rapid heat treatment of grain oriented electrical steel |
| JP2500033B2 (ja) * | 1990-12-10 | 1996-05-29 | 川崎製鉄株式会社 | 磁気特性が優れかつ表面外観の良い無方向性電磁鋼板の製造方法 |
| KR0182802B1 (ko) * | 1993-01-12 | 1999-04-01 | 다나카 미노루 | 극히 낮은 철손을 갖는 일방향성 전자강판 및 그 제조방법 |
| JPH06228645A (ja) * | 1993-02-02 | 1994-08-16 | Sumitomo Metal Ind Ltd | 小型静止器用電磁鋼板の製造方法 |
| RU2085598C1 (ru) * | 1994-01-31 | 1997-07-27 | Акционерное общество "Новолипецкий металлургический комбинат" | Способ получения изотропной электротехнической стали |
| US6139650A (en) * | 1997-03-18 | 2000-10-31 | Nkk Corporation | Non-oriented electromagnetic steel sheet and method for manufacturing the same |
| US5955201A (en) * | 1997-12-19 | 1999-09-21 | Armco Inc. | Inorganic/organic insulating coating for nonoriented electrical steel |
| DE19807122C2 (de) * | 1998-02-20 | 2000-03-23 | Thyssenkrupp Stahl Ag | Verfahren zur Herstellung von nichtkornorientiertem Elektroblech |
| EP2107130B1 (en) * | 2000-08-08 | 2013-10-09 | Nippon Steel & Sumitomo Metal Corporation | Method to produce grain-oriented electrical steel sheet having high magnetic flux density |
| KR100683471B1 (ko) * | 2004-08-04 | 2007-02-20 | 제이에프이 스틸 가부시키가이샤 | 무방향성 전자 강판의 제조방법, 및 무방향성 전자강판용의 소재 열연 강판 |
| WO2007069776A1 (ja) * | 2005-12-15 | 2007-06-21 | Jfe Steel Corporation | 高強度無方向性電磁鋼板およびその製造方法 |
| JP4855222B2 (ja) * | 2006-11-17 | 2012-01-18 | 新日本製鐵株式会社 | 分割コア用無方向性電磁鋼板 |
| JP5369454B2 (ja) * | 2008-02-27 | 2013-12-18 | Jfeスチール株式会社 | 無方向性電磁鋼板の製造方法 |
-
2010
- 2010-08-30 JP JP2010191714A patent/JP5854182B2/ja not_active Expired - Fee Related
-
2011
- 2011-08-25 BR BR112013004506-0A patent/BR112013004506B1/pt not_active IP Right Cessation
- 2011-08-25 EP EP11821638.1A patent/EP2612933B1/en active Active
- 2011-08-25 WO PCT/JP2011/069136 patent/WO2012029621A1/ja not_active Ceased
- 2011-08-25 US US13/812,430 patent/US20130146187A1/en not_active Abandoned
- 2011-08-25 RU RU2013114304/02A patent/RU2529258C1/ru active
- 2011-08-25 KR KR1020137004831A patent/KR101499371B1/ko active Active
- 2011-08-25 CN CN2011800294122A patent/CN102959099A/zh active Pending
- 2011-08-26 TW TW100130683A patent/TWI481724B/zh active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0211728A (ja) * | 1988-03-25 | 1990-01-16 | Armco Advanced Materials Corp | 無配向性電気鉄板の超高速焼なまし |
| JPH055126A (ja) * | 1991-03-15 | 1993-01-14 | Sumitomo Metal Ind Ltd | 無方向性電磁鋼板の製造方法 |
| JPH04346621A (ja) * | 1991-05-21 | 1992-12-02 | Kawasaki Steel Corp | 磁気特性が優れかつ表面外観の良い無方向性電磁鋼板の製造方法 |
| JPH05171291A (ja) * | 1991-06-26 | 1993-07-09 | Nippon Steel Corp | 磁気特性に優れた無方向性電磁鋼板の製造方法 |
| JP2004332042A (ja) | 2003-05-07 | 2004-11-25 | Nippon Steel Corp | 圧延方向とその板面内垂直方向磁気特性の優れた無方向性電磁鋼板の製造方法 |
| JP2008127600A (ja) | 2006-11-17 | 2008-06-05 | Nippon Steel Corp | 分割コア用無方向性電磁鋼板 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2612933A4 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9920393B2 (en) | 2012-03-15 | 2018-03-20 | Jfe Steel Corporation | Method of producing non-oriented electrical steel sheet |
| WO2014129034A1 (ja) * | 2013-02-21 | 2014-08-28 | Jfeスチール株式会社 | 磁気特性に優れるセミプロセス無方向性電磁鋼板の製造方法 |
| US9978488B2 (en) | 2013-02-21 | 2018-05-22 | Jfe Steel Corporation | Method for producing semi-processed non-oriented electrical steel sheet having excellent magnetic properties |
| WO2019182022A1 (ja) | 2018-03-23 | 2019-09-26 | 日本製鉄株式会社 | 無方向性電磁鋼板 |
| KR20200116990A (ko) | 2018-03-23 | 2020-10-13 | 닛폰세이테츠 가부시키가이샤 | 무방향성 전자 강판 |
| US11421297B2 (en) | 2018-03-23 | 2022-08-23 | Nippon Steel Corporation | Non-oriented electrical steel sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012046806A (ja) | 2012-03-08 |
| KR101499371B1 (ko) | 2015-03-05 |
| EP2612933A1 (en) | 2013-07-10 |
| JP5854182B2 (ja) | 2016-02-09 |
| EP2612933A4 (en) | 2016-07-06 |
| TWI481724B (zh) | 2015-04-21 |
| EP2612933B1 (en) | 2020-02-26 |
| RU2529258C1 (ru) | 2014-09-27 |
| US20130146187A1 (en) | 2013-06-13 |
| BR112013004506A2 (pt) | 2016-06-07 |
| KR20130032913A (ko) | 2013-04-02 |
| TW201221652A (en) | 2012-06-01 |
| BR112013004506B1 (pt) | 2022-09-20 |
| CN102959099A (zh) | 2013-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5854182B2 (ja) | 無方向性電磁鋼板の製造方法 | |
| JP5668460B2 (ja) | 無方向性電磁鋼板の製造方法 | |
| JP5892327B2 (ja) | 無方向性電磁鋼板の製造方法 | |
| JP6236470B2 (ja) | 磁気特性に優れる無方向性電磁鋼板 | |
| TW202104613A (zh) | 無方向性電磁鋼板的製造方法與馬達鐵芯的製造方法、以及馬達鐵芯 | |
| KR102062184B1 (ko) | 자기 특성이 우수한 무방향성 전자 강판의 제조 방법 | |
| WO2014129034A1 (ja) | 磁気特性に優れるセミプロセス無方向性電磁鋼板の製造方法 | |
| WO2013080891A1 (ja) | 無方向性電磁鋼板の製造方法 | |
| WO2015107967A1 (ja) | 磁気特性に優れる無方向性電磁鋼板 | |
| JP5573147B2 (ja) | 無方向性電磁鋼板の製造方法 | |
| JP2016125134A (ja) | リサイクル性に優れる無方向性電磁鋼板およびその製造方法 | |
| JP6270305B2 (ja) | モータコアの製造方法 | |
| WO2016111088A1 (ja) | 無方向性電磁鋼板およびその製造方法 | |
| JP6623795B2 (ja) | 電磁鋼板、および電磁鋼板の製造方法 | |
| JPH11236618A (ja) | 低鉄損無方向性電磁鋼板の製造方法 | |
| JP2008260996A (ja) | 圧延方向の磁気特性に優れる無方向性電磁鋼板およびその製造方法 | |
| US12435399B2 (en) | Non-oriented electrical steel sheet and manufacturing method therefor | |
| KR101722701B1 (ko) | 무방향성 전기강판 및 그의 제조방법 | |
| WO2018123558A1 (ja) | リサイクル性に優れる無方向性電磁鋼板 | |
| JP2001140046A (ja) | 高磁場特性に優れた無方向性電磁鋼板およびその製造方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 201180029412.2 Country of ref document: CN |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11821638 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 13812430 Country of ref document: US |
|
| ENP | Entry into the national phase |
Ref document number: 20137004831 Country of ref document: KR Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2011821638 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| ENP | Entry into the national phase |
Ref document number: 2013114304 Country of ref document: RU Kind code of ref document: A |
|
| REG | Reference to national code |
Ref country code: BR Ref legal event code: B01A Ref document number: 112013004506 Country of ref document: BR |
|
| ENP | Entry into the national phase |
Ref document number: 112013004506 Country of ref document: BR Kind code of ref document: A2 Effective date: 20130226 |