EP4158072A1 - Verfahren zum rekristallisierenden glühen eines nicht-kornorientierten elektrobandes - Google Patents
Verfahren zum rekristallisierenden glühen eines nicht-kornorientierten elektrobandesInfo
- Publication number
- EP4158072A1 EP4158072A1 EP21723225.5A EP21723225A EP4158072A1 EP 4158072 A1 EP4158072 A1 EP 4158072A1 EP 21723225 A EP21723225 A EP 21723225A EP 4158072 A1 EP4158072 A1 EP 4158072A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- electrical steel
- maximum
- heated
- continuous furnace
- 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.)
- Pending
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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties characterised by the heat treatment
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1277—Modifying the physical properties of ferrous metals or ferrous alloys 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
-
- 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/60—Continuous furnaces for strip or wire with induction heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
- F27B9/3005—Details, accessories or equipment specially adapted for furnaces of these types arrangements for circulating gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
- F27B9/3005—Details, accessories or equipment specially adapted for furnaces of these types arrangements for circulating gases
- F27B9/3011—Details, accessories or equipment specially adapted for furnaces of these types arrangements for circulating gases arrangements for circulating gases transversally
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
- F27B9/36—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/06—Induction heating, i.e. in which the material being heated, or its container or elements embodied therein, form the secondary of a transformer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
-
- 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
- C21D9/565—Sealing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
- F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
- F27D2007/063—Special atmospheres, e.g. high pressure atmospheres
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- the present invention relates to a method for the recrystallizing annealing of a non-grain-oriented electrical steel strip in a continuous annealing and coating line.
- Non-grain-oriented electrical steel is generally used in the manufacture of electrical machines, for example in the form of so-called laminated cores.
- Such non-grain-oriented electrical strips are usually produced by casting a specific metallic composition into a slab and immediately hot-rolling it into a so-called hot strip.
- the hot strip is then subjected to an annealing treatment and, in a further step, is cold-rolled into what is known as a cold strip.
- the cold strip is then annealed to recrystallize in a continuous annealing and coating line and then coated with an insulation coating. Based on the English usage, such a line is also referred to as a so-called "ACL" (Annealing Coating Line).
- ACL Annealing Coating Line
- European patent application EP 3 388 537 B1 discloses a method for producing a non-grain-oriented electrical steel strip with a high magnetic flux density, in which the electrical steel strip is annealed in two steps in order to achieve the most homogeneous, fine-grained grain size distribution possible.
- the cold strip is first heated to over 700 ° C via an induction stage at 200 K / s before it is post-annealed in a second stage using radiant heat, in which targeted grain growth takes place.
- Another method for producing a non-grain-oriented electrical steel is known from the European patent application EP 3263 719 B1, with over Targeted adjustment of the metallic composition optimizes the magnetic flux density of the electrical steel.
- the cold strip produced in the preliminary process usually has noticeable residues of water, the rolling emulsions used and other fluids on its strip surface, which lead to the formation of condensate within the induction stage as a result of the rapid heating and considerably impair the quality of the electrical steel due to condensate dripping off. Furthermore, the condensed fluid precipitates can crack within the induction stage and form electrically conductive deposits in which heat is induced in an uncontrolled manner.
- the present invention is therefore based on the object of developing a method for the recrystallizing annealing of a non-grain-oriented electrical steel strip to the effect that a structural recovery in the non-grain-oriented electrical steel strip is suppressed as far as possible without causing the condensation known from the prior art.
- the object is achieved by a method having the features of claim 1.
- the electrical steel strip is heated in an induction furnace to a temperature of at least 680 ° C with a heating rate of at least 80 K / s and then, if necessary, in a The second continuous furnace is heated to a temperature of at least 820 ° C with a heating rate of a maximum of 20 K / s.
- the method is characterized in that the non-grain-oriented electrical steel strip is first heated to a temperature of at least 300 ° C.
- the first continuous furnace can be a conventional continuous furnace that is heated by means of radiant heating tubes and / or electrical heating elements.
- the aim is to achieve a fine-grained grain size distribution that is as homogeneous as possible and a crystallographic texture.
- this is achieved by the subsequent induction stage, in which the residue-free electrical steel strip is then heated to a temperature of at least 680 ° C with a heating rate of at least 80 K / s, preferably with a heating rate of at least 100 K / s, more preferably with a heating rate is heated by at least 150 K / s, even more preferably at a heating rate in the range from 150 to 250 K / s, so that the area of structural recovery, which is typically at a temperature in the range from 450 ° C to 680 ° C, is rapid can be driven through in order to suppress the structural recovery as far as possible.
- the heating rate in the first continuous furnace is preferably a maximum of 50 K / s, preferably a maximum of 45 K / s, more preferably a maximum of 40 K / s, even more preferably 35 K / s, and most preferably a maximum of 30 K / s.
- the heating rate must not be too low, so that it is preferably at least 10 K / s, more preferably at least 15 K / s and even more preferably at least 20 K / s
- the dwell time in which the electrical steel passes through the first continuous furnace is therefore at least 5 s and is limited to 20 s. More preferably, the residence time in the first conveyor oven is 10 to 15 seconds. As already explained, the structural recovery of the electrical steel must be suppressed as far as possible in order to achieve the desired magnetic properties, such as a high magnetic flux density.
- the temperature to which the electrical steel is heated in the first continuous furnace is therefore a maximum of 500 ° C., preferably a temperature of a maximum of 480 ° C., more preferably a temperature of a maximum of 460 ° C. and most preferably a temperature of limited to a maximum of 450 ° C.
- a particularly preferred temperature range to which the electrical steel is heated in the first continuous furnace is 350 to 420 ° C.
- the first continuous furnace is continuously flushed with a flushing gas, which is particularly preferably fed in countercurrent to the first continuous furnace.
- the flushing gas is a is hydrogen-rich gas, which advantageously has a hydrogen content of 20 to 50% by volume.
- the electrical steel is preferably heated in the induction furnace in two stages.
- a first stage the electrical steel is first heated to a temperature in the range of 680-700 ° C. with a heating rate of at least 80 K / s, preferably with a heating rate of at least 100 K / s, more preferably with a heating rate of at least 150 K. / s, more preferably heated at a heating rate in the range from 150 to 250 K / s.
- This is advantageously done using a longitudinal field inductor, which heats the electrical steel strip evenly over the entire strip width.
- the electrical steel is then heated to a temperature in the range of 700-950 ° C, preferably to a temperature in the range of 720-800 ° C, even more preferably to a temperature in the range of 740-780 ° C warmed up.
- a cross-field inductor can be used for these higher strip temperatures. This generates significant temperature differences of 10 to 30 K across the entire strip width of the electrical strip, mostly in the form of temperature deviations between the strip edges and the middle of the strip.
- the electrical steel is heated to a temperature of at least 820 ° C., preferably to a temperature in the range of 820-1100 ° C., more preferably to a Temperature in the range of 820-1050 ° C with a heating rate of a maximum of 20 K / s, preferably with a heating rate of a maximum of 15 K / s.
- the temperature differences generated in the induction furnace must subside across the bandwidth of the electrical steel until the folding temperature is reached.
- a dwell time of at least 5 s, preferably at least 10 s, is advantageously required, during which the electrical steel strip is annealed at a temperature in the range of 820-1050.degree.
- the second continuous furnace is followed by the usual furnace sections for maintaining the target temperature and a cooling section.
- Fig. 1 shows a variant of an annealing and treatment line for
- FIG. 2 shows a variant embodiment of a temperature profile of the method according to the invention.
- an embodiment of an annealing and treatment line 1 for performing the method according to the invention, in which, for example, a non-grain-oriented electrical steel strip 2 with a width of 1200 mm and a strip thickness of 500 ⁇ m at a strip speed of 150 m / min a temperature treatment , as shown by way of example in FIG. 2, is subjected.
- the annealing and treatment line 1 comprises a first continuous furnace 3 with electrical heating elements 4, by means of which the electrical strip 2 is heated.
- the first continuous furnace 3 has a length of 30 m.
- An induction furnace 5, which is formed from two separate stages 6, 7, is arranged behind in the direction of travel of the strip and has a total length of 6 m.
- the induction furnace 5 is followed by a second continuous furnace 8, which is also conventionally heated by means of heating elements 4.
- the second continuous furnace 8 has a length of 42 m.
- a holding zone 9 with a length of 54 m is also provided behind the second continuous furnace 8 in the direction of travel of the strip.
- the non-grain-oriented electrical steel 2 first enters the first radiation-heated continuous furnace 3 via an inlet lock 10.
- the electrical steel 2 is heated to 450 ° C. within 30 s.
- the structure recovery is negligibly small up to this temperature.
- the low heating rate of 15 K / s in the present case is advantageous in order to slowly and without cracking evaporate the residues from the pre-process that are inevitable on the electrical steel strip 2.
- the hot inner walls of the first continuous furnace 3 guarantee that the residues now in the gas atmosphere do not condense.
- the evaporation of the residues from the electrical steel strip 2 generally leads to a strong development of smoke.
- the first continuous furnace 3 is therefore continuously flushed in countercurrent with a hydrogen-rich purge gas, which is fed to the first continuous furnace 3 via an inlet opening 11a and discharged again via an outlet opening 11b.
- the purge gas can also be fed further downstream, for example via the second continuous furnace 8 and / or via the holding zone 9, as indicated by the arrows 13, to the treatment line 1.
- the electrical steel strip 2 then passes the induction furnace 5, in which it is first heated up to 700 ° C. in a longitudinal field inductor 6 and then up to 800 ° C. in a transverse field inductor 7.
- Oven rollers 12 are located between the individual stages 6, 7 in order to keep the belt slack low and to be precise To ensure guidance of the electrical steel 2 through the narrow gaps of the two inductors 6, 7.
- the furnace roller 12 Since the furnace roller 12 is arranged outside the inductors 6, 7, there is an unavoidable interruption in the heating. However, at 180 K / s, the resulting average heating rate in the induction furnace 5 is high enough to reliably suppress the recovery of the structure and thus uneven grain growth. The further heating to 1,000 ° C. takes place in the second continuous furnace part 8, which is heated by radiation. The heating rate in this continuous furnace 8 is insignificant in terms of quality and therefore depends only on its overall length and on ensuring a sufficient heating time. In the holding zone 9, the desired grain size in the structure is set by maintaining the strip temperature at 1,000 ° C. with a dwell time of 26 s.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020206775 | 2020-05-29 | ||
| DE102021201616.2A DE102021201616A1 (de) | 2020-05-29 | 2021-02-19 | Verfahren zum rekristallisierenden Glühen eines nicht-kornorientierten Elektrobandes |
| PCT/EP2021/061507 WO2021239394A1 (de) | 2020-05-29 | 2021-05-03 | Verfahren zum rekristallisierenden glühen eines nicht-kornorientierten elektrobandes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4158072A1 true EP4158072A1 (de) | 2023-04-05 |
Family
ID=78509120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21723225.5A Pending EP4158072A1 (de) | 2020-05-29 | 2021-05-03 | Verfahren zum rekristallisierenden glühen eines nicht-kornorientierten elektrobandes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20230212708A1 (de) |
| EP (1) | EP4158072A1 (de) |
| CN (1) | CN115667557A (de) |
| DE (1) | DE102021201616A1 (de) |
| WO (1) | WO2021239394A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023205765A1 (de) * | 2023-06-20 | 2024-12-24 | Sms Group Gmbh | Verfahren und Vorrichtung zum Herstellen von Nicht-Korn-Orientiertem Elektroband |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3825448A (en) * | 1972-10-26 | 1974-07-23 | Youngstown Sheet And Tube Co | Production of ductile high strength galvanized steel |
| JPS51149129A (en) * | 1975-06-18 | 1976-12-21 | Nippon Steel Corp | Method of producing zincccoated iron plate with good workability |
| JPH0723512B2 (ja) * | 1991-11-30 | 1995-03-15 | 株式会社シルベニア | 被熱処理金属条の加熱方法及びその加熱炉 |
| DE59300400D1 (de) * | 1992-04-06 | 1995-08-31 | Ebg Elektromagnet Werkstoffe | Verfahren und Vorrichtung zur Reinigung von Metallbandoberflächen durch Gasspülung in wasserstoffreichen Atmosphären. |
| JP5217543B2 (ja) * | 2008-03-18 | 2013-06-19 | 新日鐵住金株式会社 | キュリー点を有する鋼帯の連続焼鈍方法及び連続焼鈍設備 |
| JP5434960B2 (ja) * | 2010-05-31 | 2014-03-05 | Jfeスチール株式会社 | 曲げ性および溶接性に優れる高強度溶融亜鉛めっき鋼板およびその製造方法 |
| JP5505430B2 (ja) * | 2012-01-17 | 2014-05-28 | Jfeスチール株式会社 | 鋼帯の連続焼鈍炉及び連続焼鈍方法 |
| CN104775021A (zh) * | 2014-01-10 | 2015-07-15 | 宝山钢铁股份有限公司 | 碳钢薄板连退产线快速加热方法及装置 |
| JP6112042B2 (ja) * | 2014-02-26 | 2017-04-12 | Jfeスチール株式会社 | 連続焼鈍炉の立ち上げ方法 |
| WO2016136095A1 (ja) | 2015-02-24 | 2016-09-01 | Jfeスチール株式会社 | 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 |
| 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 |
| MX2018007972A (es) * | 2015-12-28 | 2018-11-09 | Jfe Steel Corp | Lamina de acero electrico de grano no orientado y metodo para la fabricacion de lamina de acero electrico de grano no orientado. |
| CN109694946B (zh) * | 2017-10-24 | 2020-06-23 | 宝山钢铁股份有限公司 | 快速加热冷轧带钢的装置与方法 |
-
2021
- 2021-02-19 DE DE102021201616.2A patent/DE102021201616A1/de active Pending
- 2021-05-03 WO PCT/EP2021/061507 patent/WO2021239394A1/de not_active Ceased
- 2021-05-03 CN CN202180038812.3A patent/CN115667557A/zh active Pending
- 2021-05-03 EP EP21723225.5A patent/EP4158072A1/de active Pending
- 2021-05-03 US US17/927,975 patent/US20230212708A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BR112022024319A2 (pt) | 2022-12-27 |
| CN115667557A (zh) | 2023-01-31 |
| DE102021201616A1 (de) | 2021-12-02 |
| US20230212708A1 (en) | 2023-07-06 |
| WO2021239394A1 (de) | 2021-12-02 |
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