WO2008050700A1 - Tôle magnétique unidirectionnelle en acier présentant d'excellentes caractéristiques de pertes dans le fer - Google Patents
Tôle magnétique unidirectionnelle en acier présentant d'excellentes caractéristiques de pertes dans le fer Download PDFInfo
- Publication number
- WO2008050700A1 WO2008050700A1 PCT/JP2007/070507 JP2007070507W WO2008050700A1 WO 2008050700 A1 WO2008050700 A1 WO 2008050700A1 JP 2007070507 W JP2007070507 W JP 2007070507W WO 2008050700 A1 WO2008050700 A1 WO 2008050700A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rolling direction
- iron loss
- steel sheet
- residual stress
- strain
- Prior art date
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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
-
- 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
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
- C21D10/005—Modifying the physical properties by methods other than heat treatment or deformation by laser shock processing
-
- 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
-
- 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
- C21D8/1294—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a localized treatment
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/16—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of sheets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14708—Fe-Ni based alloys
- H01F1/14716—Fe-Ni based alloys in the form of sheets
Definitions
- the present invention relates to a unidirectional electrical bright and magnetic steel sheet having excellent iron loss characteristics obtained by introducing a residual stress by laser irradiation or the like and performing magnetic domain control.
- the iron loss of electrical steel is roughly divided into hysteresis loss and eddy current loss.
- Hysteresis loss is known to be affected by crystal orientation, defects, grain boundaries, etc.
- eddy current loss is known to be affected by plate thickness, electrical resistance, magnetic domain width, and the like. Since there are limits to the methods for controlling and improving crystal orientation to reduce hysteresis loss, in recent years there have been many subdivisions of magnetic domain width, that is, magnetic domain control techniques, in order to reduce eddy current loss, which accounts for the majority of iron loss. Proposed.
- Japanese Patent Laid-Open No. 2005-248291 discloses a new proposal that pays attention to the maximum value of the residual stress in the rolling direction formed on the surface of the steel sheet. Disclosure of the invention
- the energy of the steel plate (determined by the laser wavelength, surface properties, shape, film composition) and film thickness depend on the laser energy to thermal energy (temperature distribution, Since the conversion to (temperature history) is different, the strain introduced varies depending on the properties of the steel sheet even if the laser irradiation conditions are the same.
- the physical properties for example, Young's modulus and yield stress
- the steel sheet composition for example, Si content
- Patent Document 2 quantitatively mentions only the strain and residual stress, there is a limit to reducing iron loss only by controlling the strain and tensile residual stress on the steel sheet surface.
- the object of the present invention is to reduce the iron loss of the unidirectional electrical steel sheet to the hysteresis loss and the vortex. Compared to the conventional method, it is divided into current loss, especially from the viewpoint of eddy current loss, by controlling the distribution of strain and residual stress under quantitatively appropriate conditions including not only the surface but also the internal plate thickness direction. The object is to provide a unidirectional electrical steel sheet with excellent iron loss.
- the present inventors conducted an experiment of magnetic domain control to introduce residual stress by distorting the unidirectional electrical steel sheet by laser irradiation or the like, and the distribution of residual stress introduced into the obtained low iron loss unidirectional electrical steel sheet Research has been conducted eagerly. As a result, we found a correlation between residual stress and eddy current loss, and found that a unidirectional electrical steel sheet with excellent iron loss characteristics can be realized by controlling the compression stress value and strain interval.
- the gist of the present invention is as follows.
- a periodic interval in the rolling direction of uniform strain in the sheet width direction by laser beam irradiation is 2 M or more and 8 thighs or less. Special feature.
- FIG. 1 is a schematic view of an apparatus used in the method for producing a unidirectional electrical steel sheet of the present invention.
- Figure 2 shows the two-dimensional distribution of the residual stress in the rolling direction near the laser irradiation position in the cross section in the rolling direction / thickness direction.
- Figure 3 shows the relationship between the maximum tensile residual stress in the rolling direction and iron loss W 17/5 Q.
- Figure 4 shows the relationship between the integral compressive stress value ⁇ S and the eddy current loss We (fixed with an irradiation interval of 4 mm).
- Figure 5 shows the relationship between the integral compressive stress value ⁇ S and the iron loss W 17/5 fl (irradiation, interval 4 mm fixed).
- Figure 7 shows the maximum compressive residual stress in the rolling direction and iron loss W 17/5 .
- FIG. 1 is an explanatory diagram of a laser beam irradiation method according to the present invention.
- a continuous wave (CW) laser beam LB output from the laser device 3 is used, and a polygon mirror 4 and an f 0 lens 5 are used.
- the electromagnetic steel sheet 1 was scanned and irradiated.
- 6 is a cylindrical lens or a plurality of cylindrical group lenses.
- the condensing diameter of the laser beam condensing spot in the beam scanning direction (the plate width direction perpendicular to the rolling direction) (length in the scanning direction) It is used to control the condensing shape from circular to elliptical by changing dc.
- Average irradiation energy density U a [mJ / mm 2 ] is the laser power P [W], the laser beam width direction scanning (scanning) speed V c [i / s], the laser irradiation in the rolling direction Using the spacing PL (mm)
- FIG. 1 shows an example in which a pair of lasers and a laser beam scribing device is used, but a plurality of similar devices may be arranged in the plate width direction according to the plate width of the steel plate.
- the present inventors have used a continuous wave fiber laser apparatus having a fiber core diameter of 10 m to change the irradiation conditions in various combinations of the condensing spot shape and the average irradiation energy density U a, and An experiment was conducted in which the laser beam was scanned on the surface in a bowl shape in a direction substantially perpendicular to the rolling direction. The two-dimensional distribution of residual stress in the rolling direction and the iron loss and hysteresis loss in the cross section perpendicular to the plate width direction were measured, and the iron loss was separated into hysteresis loss and eddy current loss.
- the two-dimensional distribution of residual stress in the rolling direction in the cross section perpendicular to the sheet width direction was measured by measuring the lattice spacing by the X-ray diffraction method and converting it into stress using physical properties such as elastic modulus.
- the iron loss was measured as W 17/5 Q with an SST (Single Sheet Tester) measuring instrument.
- W 17/5 Q is frequency 50Hz, maximum magnetic flux density 1.7
- the iron loss at T In the grain-oriented electrical steel sheet samples used in this example, when the plate thickness is 0. 23 mm, the before laser irradiation W, 7/5. was 0.86 W / kg.
- hysteresis loss was calculated from the hysteresis loop, and the eddy current was the value obtained by subtracting the hysteresis loss from the aforementioned iron loss.
- Fig. 2 shows a typical example of the two-dimensional distribution in the cross section perpendicular to the sheet width direction of the compressive residual stress in the rolling direction generated near the laser irradiation position.
- the width in the rolling direction where residual stress and plastic strain exist is almost proportional to the rolling direction diameter dl of the laser focusing spot.
- the present inventors investigated the relationship between the maximum value of the tensile residual stress and compressive residual stress on the steel sheet surface and the iron loss of the steel sheet irradiated with a continuous wave laser.
- Figure 3 shows the relationship between the maximum tensile residual stress and iron loss
- Fig. 7 shows the relationship between the maximum compressive residual stress and iron loss.
- the maximum value of tensile residual stress there is no correlation with iron loss or an optimum value.
- the iron loss is good at 10 OMPa or more shown by the alternate long and short dash line, but the upper limit is not clear.
- the iron loss in magnetic domain control by laser irradiation cannot be explained by the maximum value of tensile residual stress, and cannot be completely explained by the maximum value of compressive residual stress.
- the present inventors have, as a first point of interest, the maximum value of the tensile residual stress is larger than the compressive residual stress, and the tensile residual stress is concentrated in a narrow region.
- the yield stress that is, the plastic strain region
- the relationship between the maximum value of the compressive residual stress and the iron loss has been found, Even if the maximum value of compressive residual stress is the same, compressive residual We focused on the difference in the stress distribution in the depth direction.
- the main factors that realize iron loss reduction and magnetic domain subdivision are that the primary focus point is that compressive stress, not tensile stress, is important, and the second focus point is that the maximum residual stress It came to the idea that the breadth of the distribution, not the value, was important.
- the integral compressive stress value [N] is the compressive residual stress of the cross section
- S [mm 2 ] is the area where the compressive residual stress exists in the cross section
- ds is the area fragment
- ⁇ S is defined as the integrated value of stress ⁇ within the area S .
- the integrated compressive stress value is the sum of compressive residual stresses introduced by laser irradiation.
- the laser irradiation interval PL in the rolling direction is 4 mm (constant)
- the laser focusing spot shape is 20 X 2500 ⁇ m, 100 X 500 100 X 2000 m, 300 x2 OO zm
- the laser power is stepwise for each of them.
- the integral compression stress value was determined by the above method.
- the eddy current loss was obtained by subtracting the hysteresis loss from the measured iron loss.
- Figure 4 shows the relationship between the two steel sheets, plotting the integral compressive stress value S on the horizontal axis and the eddy current loss We on the vertical axis.
- the iron loss improvement rate 77 is
- V (%) ⁇ (iron loss of material one reached iron loss) iron loss of material ⁇ X 1 0 0 is defined.
- the laser irradiation interval PL in the rolling direction was fixed at 4 mm, but the effect was investigated by changing the laser irradiation interval PL in the rolling direction.
- the converging spot shape of the laser beam is 0.1 mm in the rolling direction and 0.5 mm in the scanning direction (sheet width direction), and the integrated compressive stress ⁇ S is in the range of 0.20 ⁇ ⁇ S ⁇ 0.80 ⁇ .
- U a adjusted. 6 the laser irradiation interval PL in the rolling direction in the horizontal axis, the iron loss W I 7/50 on the vertical axis and plot shows the relationship between them.
- the integrated compressive stress value was calculated after measuring the residual stress under the irradiation conditions shown in Table 1 using a continuous wave laser on the steel sheet surface.
- the iron loss (W 17/5 fl ) was measured.
- the results are summarized in the same Table 1.
- the laser power was fixed at 200 W and the laser irradiation interval in the rolling direction was fixed at 4 mm.
- the integral compressive stress value was calculated by measuring the residual stress (strain) in the rolling direction using the X-ray diffraction method, and calculating the compressive stress from Equation (2).
- the electrical steel sheets shown in the tests No. 1 to No. 6 all have an integral compressive stress value ⁇ S in the rolling direction and a laser irradiation interval (strain interval) in the rolling direction.
- PL is in the range specified by the present invention 0.200.75 ⁇ a S ⁇ 0.80 ⁇ , 2 mm ⁇ PL ⁇ 8 mm, so iron loss improvement rate is 13%, low iron loss value (W 17/5 fl ) 0.75 Reduced to less than W / kg.
- integral compression stress value conditions of irradiation interval PL of those satisfying the conditions is outside the test N o. 7 'and N o.
- Electromagnetic steel sheet shown in 8 low iron loss value (W, 7/50) 0.75W / kg The following has not been achieved. Thus, if the present invention is used, a unidirectional electrical steel sheet having excellent iron loss characteristics can be obtained.
- the residual stress introduced into the unidirectional electrical steel sheet in particular, the compressive residual stress is controlled quantitatively and appropriately, so that the unidirectionality is stable and superior in iron loss characteristics compared to the conventional one.
- An electromagnetic steel sheet can be obtained.
- the unidirectional electrical steel sheet of the present invention as an iron core, a highly efficient and compact transformer can be manufactured. Therefore, the industrial utility value of the present invention is very high.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Dispersion Chemistry (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/311,756 US20090272464A1 (en) | 2006-10-23 | 2007-10-16 | Grain-Oriented Electrical Sheet Superior in Watt Loss |
EP07830241.1A EP2083091B1 (en) | 2006-10-23 | 2007-10-16 | Unidirectional magnetic steel sheet excellent in iron loss characteristic |
PL07830241T PL2083091T3 (pl) | 2006-10-23 | 2007-10-16 | Jednokierunkowa magnetyczna blacha stalowa o doskonałej charakterystyce w zakresie strat magnetycznych |
BRPI0717360-1B1A BRPI0717360B1 (pt) | 2006-10-23 | 2007-10-16 | Chapa elétrica de granulação orientada, superior em perda em watt |
CN2007800391681A CN101528951B (zh) | 2006-10-23 | 2007-10-16 | 铁损特性优异的单向性电磁钢板 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-287709 | 2006-10-23 | ||
JP2006287709A JP5613972B2 (ja) | 2006-10-23 | 2006-10-23 | 鉄損特性の優れた一方向性電磁鋼板 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008050700A1 true WO2008050700A1 (fr) | 2008-05-02 |
Family
ID=39324497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/070507 WO2008050700A1 (fr) | 2006-10-23 | 2007-10-16 | Tôle magnétique unidirectionnelle en acier présentant d'excellentes caractéristiques de pertes dans le fer |
Country Status (10)
Country | Link |
---|---|
US (1) | US20090272464A1 (ja) |
EP (1) | EP2083091B1 (ja) |
JP (1) | JP5613972B2 (ja) |
KR (1) | KR20090064419A (ja) |
CN (1) | CN101528951B (ja) |
BR (1) | BRPI0717360B1 (ja) |
PL (1) | PL2083091T3 (ja) |
RU (1) | RU2400542C1 (ja) |
TW (1) | TW200831676A (ja) |
WO (1) | WO2008050700A1 (ja) |
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JP2012031519A (ja) * | 2010-06-30 | 2012-02-16 | Jfe Steel Corp | 方向性電磁鋼板およびその製造方法 |
WO2012068829A1 (zh) * | 2010-11-26 | 2012-05-31 | 宝山钢铁股份有限公司 | 一种快速激光刻痕方法 |
JP2021163942A (ja) * | 2020-04-03 | 2021-10-11 | 日本製鉄株式会社 | 巻鉄芯、巻鉄芯の製造方法および巻鉄芯製造装置 |
JP2021163943A (ja) * | 2020-04-03 | 2021-10-11 | 日本製鉄株式会社 | 巻鉄芯、巻鉄芯の製造方法および巻鉄芯製造装置 |
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BR112013030633B1 (pt) * | 2011-06-01 | 2018-11-13 | Nippon Steel & Sumitomo Metal Corporation | aparelho para fabricar chapa de aço para fins elétricos de grão orientado e método para fabricar chapa de aço para fins elétricos de grão orientado |
EP2799561B1 (en) * | 2011-12-27 | 2019-11-27 | JFE Steel Corporation | Device to improve iron loss properties of grain-oriented electrical steel sheet |
JP5884165B2 (ja) | 2011-12-28 | 2016-03-15 | 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 |
KR101370634B1 (ko) * | 2011-12-29 | 2014-03-07 | 주식회사 포스코 | 전기강판 및 그 제조방법 |
US10804015B2 (en) | 2011-12-29 | 2020-10-13 | Posco | Electrical steel sheet and method for manufacturing the same |
JP6007501B2 (ja) * | 2012-02-08 | 2016-10-12 | Jfeスチール株式会社 | 方向性電磁鋼板 |
JP5954421B2 (ja) * | 2012-08-30 | 2016-07-20 | Jfeスチール株式会社 | 鉄心用方向性電磁鋼板およびその製造方法 |
CN104822849B (zh) | 2012-09-06 | 2017-05-17 | Etxe-Tar有限公司 | 用于对工件的表面进行激光硬化的方法及系统 |
RU2501866C1 (ru) * | 2012-11-23 | 2013-12-20 | Владимир Иванович Пудов | Способ улучшения магнитных свойств анизотропной электротехнической стали лазерной обработкой |
JP6191640B2 (ja) * | 2014-03-27 | 2017-09-06 | Jfeスチール株式会社 | 無方向性電磁鋼板の評価方法および製造方法 |
EP3165615B1 (en) * | 2014-07-03 | 2022-12-21 | Nippon Steel Corporation | Use of a laser processing apparatus for refining magnetic domains of a grain-oriented electromagnetic steel sheet |
EP3271486B1 (en) | 2015-03-17 | 2019-09-18 | Ikergune A.I.E. | Method and system for heat treatment of sheet metal |
JP2017106117A (ja) * | 2017-01-04 | 2017-06-15 | Jfeスチール株式会社 | 変圧器鉄心用方向性電磁鋼板およびその製造方法 |
WO2019156127A1 (ja) * | 2018-02-09 | 2019-08-15 | 日本製鉄株式会社 | 方向性電磁鋼板及びその製造方法 |
CA3095320C (en) * | 2018-03-30 | 2023-10-03 | Jfe Steel Corporation | Iron core for transformer |
WO2021132378A1 (ja) * | 2019-12-25 | 2021-07-01 | 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 |
KR20230173168A (ko) * | 2021-05-31 | 2023-12-26 | 제이에프이 스틸 가부시키가이샤 | 방향성 전기 강판 |
KR20230164165A (ko) * | 2021-05-31 | 2023-12-01 | 제이에프이 스틸 가부시키가이샤 | 방향성 전기 강판 |
JP7538460B1 (ja) | 2022-11-22 | 2024-08-22 | 日本製鉄株式会社 | 鉄損特性に優れた方向性電磁鋼板 |
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JPS5518566A (en) * | 1978-07-26 | 1980-02-08 | Nippon Steel Corp | Improving method for iron loss characteristic of directional electrical steel sheet |
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2006
- 2006-10-23 JP JP2006287709A patent/JP5613972B2/ja active Active
-
2007
- 2007-10-16 US US12/311,756 patent/US20090272464A1/en not_active Abandoned
- 2007-10-16 PL PL07830241T patent/PL2083091T3/pl unknown
- 2007-10-16 EP EP07830241.1A patent/EP2083091B1/en active Active
- 2007-10-16 WO PCT/JP2007/070507 patent/WO2008050700A1/ja active Application Filing
- 2007-10-16 BR BRPI0717360-1B1A patent/BRPI0717360B1/pt active IP Right Grant
- 2007-10-16 CN CN2007800391681A patent/CN101528951B/zh active Active
- 2007-10-16 RU RU2009119474/02A patent/RU2400542C1/ru active
- 2007-10-16 KR KR1020097006759A patent/KR20090064419A/ko not_active Application Discontinuation
- 2007-10-19 TW TW096139233A patent/TW200831676A/zh unknown
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012031519A (ja) * | 2010-06-30 | 2012-02-16 | Jfe Steel Corp | 方向性電磁鋼板およびその製造方法 |
WO2012068829A1 (zh) * | 2010-11-26 | 2012-05-31 | 宝山钢铁股份有限公司 | 一种快速激光刻痕方法 |
US9604312B2 (en) | 2010-11-26 | 2017-03-28 | Baoshan Iron & Steel Co., Ltd. | Fast-speed laser scoring method |
JP2021163942A (ja) * | 2020-04-03 | 2021-10-11 | 日本製鉄株式会社 | 巻鉄芯、巻鉄芯の製造方法および巻鉄芯製造装置 |
JP2021163943A (ja) * | 2020-04-03 | 2021-10-11 | 日本製鉄株式会社 | 巻鉄芯、巻鉄芯の製造方法および巻鉄芯製造装置 |
JP7372549B2 (ja) | 2020-04-03 | 2023-11-01 | 日本製鉄株式会社 | 巻鉄芯、巻鉄芯の製造方法および巻鉄芯製造装置 |
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BRPI0717360B1 (pt) | 2014-11-04 |
CN101528951B (zh) | 2010-12-29 |
JP2008106288A (ja) | 2008-05-08 |
TWI372786B (ja) | 2012-09-21 |
TW200831676A (en) | 2008-08-01 |
EP2083091A1 (en) | 2009-07-29 |
PL2083091T3 (pl) | 2021-06-14 |
KR20090064419A (ko) | 2009-06-18 |
JP5613972B2 (ja) | 2014-10-29 |
EP2083091B1 (en) | 2020-12-02 |
US20090272464A1 (en) | 2009-11-05 |
BRPI0717360A2 (pt) | 2011-11-08 |
RU2400542C1 (ru) | 2010-09-27 |
CN101528951A (zh) | 2009-09-09 |
EP2083091A4 (en) | 2012-07-25 |
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