EP1056890A1 - Procede pour la production de tole electrique a grains non orientes - Google Patents

Procede pour la production de tole electrique a grains non orientes

Info

Publication number
EP1056890A1
EP1056890A1 EP99910250A EP99910250A EP1056890A1 EP 1056890 A1 EP1056890 A1 EP 1056890A1 EP 99910250 A EP99910250 A EP 99910250A EP 99910250 A EP99910250 A EP 99910250A EP 1056890 A1 EP1056890 A1 EP 1056890A1
Authority
EP
European Patent Office
Prior art keywords
hot
strip
rolling
annealed
hot strip
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.)
Granted
Application number
EP99910250A
Other languages
German (de)
English (en)
Other versions
EP1056890B1 (fr
Inventor
Hans Pircher
Rudolf Kawalla
Manfred Espenhahn
Brigitte Hammer
Klaus Peters
Jürgen Schneider
Carl-Dieter Wuppermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Stahl AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ThyssenKrupp Stahl AG filed Critical ThyssenKrupp Stahl AG
Publication of EP1056890A1 publication Critical patent/EP1056890A1/fr
Application granted granted Critical
Publication of EP1056890B1 publication Critical patent/EP1056890B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • C21D8/1216—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
    • 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 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
    • C21D8/1266—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 between cold rolling steps
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/04—Ferritic rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/16—Two-phase or mixed-phase 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • 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
    • C21D8/1211—Rapid solidification; Thin strip casting
    • 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

Definitions

  • the invention relates to a method for producing non-grain-oriented electrical sheet from slab or thin slab casting with low magnetic loss and high polarization as well as good mechanical properties.
  • non-grain-oriented electrical sheet is understood here to mean one according to DIN 10106 (finally annealed) or 10165 (not finally annealed).
  • more anisotropic grades are included as long as they are not considered grain-oriented electrical sheet (magnetic loss loss anisotropy up to about 30%).
  • This material is mainly used as a core material in machines (motors, generators) with a rotating magnetic flow direction.
  • EP 0 469 980 B1 requires increased reel temperatures in combination with an additional hot strip annealing. Useful magnetic properties are set even at low alloy contents. However, a higher reel temperature and the additional hot strip annealing require increased energy and thus costs.
  • EP 0 651 061 B2 proposes the setting of a cube texture that is rotated by 45 ° around the sheet normal. Interesting magnetic properties are obtained in this way, particularly with regard to polarization. However, this requires a complex process. In addition to increased final rolling and coiling temperatures, additional steps during cold rolling, such as heating and intermediate annealing, as well as one or more skin passages, must be carried out.
  • EP 0 511 601 Bl which is aimed at higher silicon and aluminum contents (Si + 2 Al> 2%), provides hot strip annealing at a particularly high temperature above 1000 ° C. This means that expensive alloying elements have to be used and very high temperatures have to be applied when the hot strip is additionally annealed.
  • the invention is based on the object of producing an electrical sheet in a cost-effective manner with a combination of high polarization, low magnetic loss and good mechanical properties that is suitable for the various fields of application.
  • the generic method according to the invention provides for continuous casting to be hot-rolled directly from the casting heat or after reheating to T> 900 ° C. and to carry out two or more forming passes in the two-phase area austenite / ferrite in the course of finish rolling in order to achieve one in relation to the Properties of the electrical sheet to set favorable condition of the hot strip.
  • the steel In order to meet this requirement, the steel must be alloyed so that an austenite content of at least 10% in the - 4- -
  • Hot rolling temperature This can be achieved by appropriately coordinating the alloy additives on austenite- or ferrite-forming elements with a basic composition of (Si + 2 Al) ⁇ 3%.
  • the steel melts used for this contain 0.001 to 0.1% C, 0.05 to 3.0% Si, up to 0.85% AI with Si + 2 AI ⁇ 3.0%, 0.05 to 2.0% Mn, Remainder iron and usual accompanying elements as well as alloy additives on P, Sn, N, Ni, Co, Ti, Nb, Zr, V, B, Sb up to a total of 1.5%.
  • reheating is usually carried out to at least 900 ° C. so that austenite is formed and the finish rolling can be carried out according to the invention in the ⁇ / ⁇ two-phase region.
  • the material is usually heated to at least 900 ° C for the reasons given above, using the casting heat for the reasons given above.
  • Thin slab or strip casting offers the following additional advantages compared to conventional slab casting: Due to the shorter cooling time until solidification, the dendrite arm spacing is smaller and therefore there are fewer increases, so the material becomes more homogeneous. Due to the smaller slab thickness and the possibility of using the casting heat, hot strip rolling is shortened and cost savings achieved. With a corresponding design of the thin slab caster, a wider range of finish rolling and coiling temperatures and lower hot strip thicknesses can be set. With low hot strip thicknesses ⁇ 1.5 mm, hot rolling can be carried out at final rolling speeds of over 10 m / s in order to maintain high productivity. - 5 -
  • Roll lubrication in at least one of the last three hot rolling passes of finish rolling can result in a more homogeneous structure across the cross section due to less shear deformation. Since the rolling force is also reduced, a higher reduction in thickness to lower final thicknesses is possible.
  • finish rolling is carried out by at least one forming pass with a change in shape
  • Si content of the steel 0.05 to 1.6% Si is expedient if, with the corresponding proportions of other components of the composition, there is no longer a two-phase region.
  • the hot strip produced up to 6 mm thick is coiled depending on the intended use at reel temperatures either below 650 ° C or in the range from 650 ° C to Arl. If the strips have been coiled at high temperatures, the coils can then either be cooled to room temperature in still air or heat-treated directly from the coil heat.
  • the heat treatment can be carried out by delayed cooling under a cover with a cooling rate of a maximum of 100 ° C / h down to 600 ° C or by hot use in an oven.
  • the furnace temperature can also be above the reel temperature.
  • Coil temperatures between 650 ° C and the Arl temperature which varies with the alloy proportions, can completely or partially replace hot strip annealing.
  • the hot strip is already softened in the coil, whereby the structural features relevant to the properties, such as grain size, texture and precipitations, - 7 -
  • the improvement in magnetic properties which is achieved with the method according to the invention compared to the conventional method, is associated with a time and energy saving in the production of the electrical sheet.
  • the hot strip can be annealed beforehand.
  • the hot strip is cold-rolled to final thickness in one or more stages with intermediate annealing, the production steps already mentioned being followed.
  • Table 1 shows magnetic property values, loss of magnetization (P) and polarization (J) which have been achieved by a conventional process and by the process according to the invention. - 8th
  • the examples show the improvement which can be achieved by using the method according to the invention on the one hand for semi finished (sf) and on the other hand for fully finished (ff) standard grades without hot strip annealing and with a conventional hot strip annealing (WBG).
  • WBG hot strip annealing
  • J polarization values
  • P magnetic reversal losses

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnetism (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
EP99910250A 1998-02-20 1999-02-20 Procede pour la production de tole electrique a grains non orientes Expired - Lifetime EP1056890B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19807122A DE19807122C2 (de) 1998-02-20 1998-02-20 Verfahren zur Herstellung von nichtkornorientiertem Elektroblech
DE19807122 1998-02-20
PCT/EP1999/001123 WO1999042626A1 (fr) 1998-02-20 1999-02-20 Procede pour la production de tole electrique a grains non orientes

Publications (2)

Publication Number Publication Date
EP1056890A1 true EP1056890A1 (fr) 2000-12-06
EP1056890B1 EP1056890B1 (fr) 2001-08-29

Family

ID=7858381

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99910250A Expired - Lifetime EP1056890B1 (fr) 1998-02-20 1999-02-20 Procede pour la production de tole electrique a grains non orientes

Country Status (12)

Country Link
US (1) US6503339B1 (fr)
EP (1) EP1056890B1 (fr)
JP (1) JP2002504624A (fr)
KR (1) KR100605139B1 (fr)
AT (1) ATE204917T1 (fr)
AU (1) AU2927699A (fr)
BR (1) BR9908106A (fr)
CA (1) CA2320124A1 (fr)
DE (2) DE19807122C2 (fr)
ES (1) ES2163329T3 (fr)
PL (1) PL186500B1 (fr)
WO (1) WO1999042626A1 (fr)

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DE19930519C1 (de) * 1999-07-05 2000-09-14 Thyssenkrupp Stahl Ag Verfahren zum Herstellen von nicht kornorientiertem Elektroblech
DE19930518C1 (de) * 1999-07-05 2000-10-12 Thyssenkrupp Stahl Ag Verfahren zum Herstellen von nicht kornorientiertem Elektroblech
DE10015691C1 (de) * 2000-03-16 2001-07-26 Thyssenkrupp Stahl Ag Verfahren zum Herstellen von nichtkornorientiertem Elektroblech
IT1316030B1 (it) * 2000-12-18 2003-03-26 Acciai Speciali Terni Spa Procedimento per la fabbricazione di lamierini a grano orientato.
DE10153234A1 (de) * 2001-10-31 2003-05-22 Thyssenkrupp Stahl Ag Für die Herstellung von nichtkornorientiertem Elektroblech bestimmtes, warmgewalztes Stahlband und Verfahren zu seiner Herstellung
DE10221793C1 (de) * 2002-05-15 2003-12-04 Thyssenkrupp Electrical Steel Ebg Gmbh Nichtkornorientiertes Elektroband oder -blech und Verfahren zu seiner Herstellung
US8361067B2 (en) 2002-09-30 2013-01-29 Relievant Medsystems, Inc. Methods of therapeutically heating a vertebral body to treat back pain
DE10253339B3 (de) * 2002-11-14 2004-07-01 Thyssenkrupp Stahl Ag Verfahren zum Herstellen eines für die Verarbeitung zu nicht kornorientiertem Elektroband bestimmten Warmbands, Warmband und daraus hergestelltes nicht kornorientiertes Elektroblech
WO2006068399A1 (fr) * 2004-12-21 2006-06-29 Posco Co., Ltd. Toles d'acier magnetiques non orientees presentant d'excellentes proprietes magnetiques et procede de fabrication correspondant
IN2012DN03845A (fr) * 2009-10-28 2015-08-28 Nippon Steel & Sumitomo Metal Corp
JP5854182B2 (ja) * 2010-08-30 2016-02-09 Ｊｆｅスチール株式会社 無方向性電磁鋼板の製造方法
CR20170156A (es) * 2014-10-20 2017-09-22 Arcelormittal Método de producción de hojalata conteniendo una lámina de acero de silicio de grano no orientado, lámina de acero obtenida y uso de esta.
CN107690483A (zh) * 2015-06-03 2018-02-13 德国沙士基达板材有限公司 由镀锌钢制成的变形‑硬化部件，其生产方法以及生产适用于部件变形‑硬化的钢带的方法
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JP6665794B2 (ja) * 2017-01-17 2020-03-13 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
KR102109240B1 (ko) * 2017-12-24 2020-05-11 주식회사 포스코 무방향성 전기강판용 열연강판, 무방향성 전기강판 및 그 제조방법
KR102045653B1 (ko) * 2017-12-26 2019-11-15 주식회사 포스코 재질과 두께의 편차가 작은 무방향성 전기강판 및 그 제조방법
KR102139649B1 (ko) * 2018-09-27 2020-07-30 주식회사 포스코 무방향성 전기강판의 제조방법
KR102164113B1 (ko) * 2018-11-29 2020-10-13 주식회사 포스코 낮은 철손 및 우수한 표면품질을 갖는 무방향성 전기강판 및 그 제조방법
CN110106447B (zh) * 2019-04-28 2020-09-29 首钢智新迁安电磁材料有限公司 一种高磁感无取向电工钢及其制备方法
DE102021115174A1 (de) 2021-06-11 2021-11-11 Technische Universität Bergakademie Freiberg, Körperschaft des öffentlichen Rechts Verfahren zur Herstellung eines höherpermeablen, nichtkornorientierten Elektrobleches und dessen Verwendung

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Also Published As

Publication number Publication date
BR9908106A (pt) 2000-10-31
AU2927699A (en) 1999-09-06
WO1999042626A1 (fr) 1999-08-26
ES2163329T3 (es) 2002-01-16
CA2320124A1 (fr) 1999-08-26
KR20010040966A (ko) 2001-05-15
PL186500B1 (pl) 2004-01-30
US6503339B1 (en) 2003-01-07
PL342361A1 (en) 2001-06-04
ATE204917T1 (de) 2001-09-15
EP1056890B1 (fr) 2001-08-29
JP2002504624A (ja) 2002-02-12
DE19807122A1 (de) 1999-09-09
DE19807122C2 (de) 2000-03-23
DE59900223D1 (de) 2001-10-04
KR100605139B1 (ko) 2006-07-28

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