WO2000005422A1 - Procede et installation pour produire des aciers a deux phases - Google Patents

Procede et installation pour produire des aciers a deux phases Download PDF

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Publication number
WO2000005422A1
WO2000005422A1 PCT/EP1999/005113 EP9905113W WO0005422A1 WO 2000005422 A1 WO2000005422 A1 WO 2000005422A1 EP 9905113 W EP9905113 W EP 9905113W WO 0005422 A1 WO0005422 A1 WO 0005422A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
ferrite
stage
dual
steels
Prior art date
Application number
PCT/EP1999/005113
Other languages
German (de)
English (en)
Inventor
August Sprock
Original Assignee
Sms Schloemann-Siemag Aktiengesellschaft
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 Sms Schloemann-Siemag Aktiengesellschaft filed Critical Sms Schloemann-Siemag Aktiengesellschaft
Priority to AT99938282T priority Critical patent/ATE224959T1/de
Priority to JP2000561368A priority patent/JP2002521562A/ja
Priority to BR9912310-0A priority patent/BR9912310A/pt
Priority to DE59902877T priority patent/DE59902877D1/de
Priority to EP99938282A priority patent/EP1108072B1/fr
Priority to CA2338743A priority patent/CA2338743C/fr
Publication of WO2000005422A1 publication Critical patent/WO2000005422A1/fr

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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—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
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • 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
    • C21D2211/005—Ferrite
    • 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
    • C21D2211/008—Martensite

Definitions

  • the invention relates to a method and a plant for the production of dual-phase steels from the hot-rolled state with a two-phase structure made of 70 to 90% ferrite and 30 to 10% martensite through a controlled temperature control and defined cooling strategy during the cooling of the steels, inter alia by means of Water cooling after its finish rolling, the cooling curve running into the ferrite area in a first cooling stage and further cooling to temperatures below the martensite starting temperature in a second cooling stage after reaching the necessary proportion
  • the targeted microstructure conversion by appropriate cooling of the steel is known.
  • DE 44 16 752 AI describes a process for producing hot wide strip, in which the surface temperature of the slab is sufficiently deep (at least before the first forming between the continuous casting machine and a compensating furnace) 2 mm) to the extent that a structural change from austenite to Fernt / Perlite occurs.
  • the cooling time is selected so that at least 70% austenite is converted to Fernt / Perlite.
  • the compensating furnace there is then a renewed conversion to Austenite with reorientation of Austenite Grain boundaries
  • second-choice scrap in particular scrap containing copper, can be used as a raw material without undesired accumulation of copper at the grain boundaries of the P ⁇ maraustenite
  • sufficient ferrite formation is achieved, for example, by cooling with water to a temperature of around 620 - 650 ° C with subsequent air cooling.
  • the duration of the air cooling (approx. 8 seconds) is selected so that at least 70% of the austenite is converted to ferrite before the second cooling stage begins During the first cooling stage and during air cooling, a conversion in the Perht stage should be avoided
  • the task is solved with the characterizing measures of claim 1 in that during the first cooling stage the cooling curve of the steels is set with a cooling rate of 20 K / s to 30 K / s so low that the cooling curve is at such a high temperature enters the ferrite area so that the ferrite formation can take place quickly and at least 70% of the austenite has already been converted into ferrite before the start of the second cooling stage
  • the cooling curve runs into the ferrite area later at a higher temperature than in the known processes, i.e. the conversion of the austenite into ferrite begins somewhat delayed but at a higher temperature than at the known methods, and it also runs faster due to the higher temperature. It has an advantageous effect if the ferrite area is reached as quickly as possible with a high transformation temperature
  • the principle of loosened cooling is used according to the invention. This is water cooling, in which water is applied to the cooling material from water cooling stages arranged one behind the other by influencing the number of water cooling stages, their distance from one another and The effective length of the water cooling stages allows the cooling rate or the amount of water applied to the cooling material (its cooling material mass and / or the surface of the cooling material) to be optimally adjusted.
  • the cooling can also be achieved with an infinitely variable quantity of coolant
  • the loosened cooling can be extended until the desired degree of conversion is reached, without the risk - as in the known methods with fast cooling - that the cooling curve leaves the ferrite area beforehand due to excessive cooling
  • the production of dual-phase steels can take place on part of the cooling section.
  • the part of the cooling section used is much shorter than in the known processes with Air cooling If the required structural components for dual-phase steels can be set without air cooling, this results in significant advantages for the operator. Fewer system components are required for the production of dual-phase steels.
  • the production spectrum can be modified with changed process and strip parameters (e.g. higher strip speed). compared to be expanded so far.
  • a system for carrying out the method of the invention is characterized by a cooling section arranged behind the last finishing mill stand, comprising a plurality of water cooling stages or cooling systems arranged one behind the other with a continuously variable amount of coolant.
  • the number of water cooling stages, their effective length and their distance from one another can be changed according to the invention, so that this cooling section can be adapted in a simple manner to changed geometries of the goods to be cooled and to different belt speeds
  • Fig. 1 is a schematic representation of the rapid cooling and the loosened cooling and their assignment in a rolling mill
  • Fig. 3 shows the degree of Ausemtumumwandung with the fast
  • Fig. 4 shows the degree of Ausemtumumwandung with the loosened
  • FIG. 1 the end of a rolling mill is shown schematically, consisting of the last finish rolling stand (1), the rolling stock or cooling stock (2) and a reel (3) with deflection rollers or driver (4) Above this part of a rolling train are two different cooling sections drawn in With the cooling section (5) according to the prior art, an early, rapid cooling of the cooling material (2) is brought about by a coherent water supply. In the cooling section (6), according to the invention, water cooling stages (7) are arranged one behind the other, thereby cooling "loosened up"
  • the cooling curve (9) shows the cooling process with the strategy commonly used today (early, rapid cooling to a certain holding temperature with subsequent air cooling, then further cooling to low temperatures below the martensite start temperature)
  • the cooling curve (10) with its first cooling stage (14) reaches the ferrite area (F) at point (15) later in the loosened cooling compared to the cooling curve (9). Since the loosened cooling is initially maintained after reaching the ferrite area (F) no time-consuming holding time with air cooling is required and the cooling curve (10) leaves the ferrite area (F) earlier
  • the loosened cooling is maintained within the ferrite area (F) until the desired degree of conversion is reached. Then the further cooling with the second cooling stage (16) takes place immediately.
  • the invention is not limited to the exemplary cooling curves described in the illustrations, but also other cooling curves, such as, for example, in cooling systems with an infinitely variable amount of cooling agent, which in the sense of the invention lead to higher conversion temperatures, are also possible.
  • the invention is not restricted to water cooling , but other cooling systems can be used, which lead to an early reaching of the ferrite area at high temperatures

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Articles (AREA)
  • Control Of Heat Treatment Processes (AREA)

Abstract

L'invention concerne la production d'aciers à deux phases (2) obtenus par refroidissement ciblé après la dernière étape de déformation dans une cage de laminoir (1). Selon ce procédé, on ajuste une structure à deux phases composée de 70 à 90 % de ferrite et de 30 à 10 % de martensite. Afin de ne pas dépendre de la géométrie de l'acier et de la vitesse du feuillard, il est prévu selon l'invention d'effectuer le refroidissement sous forme de refroidissement par dispersion, dans une section de refroidissement (6) avec des étages d'eau de refroidissement (7) placés les uns à la suite des autres.
PCT/EP1999/005113 1998-07-24 1999-07-17 Procede et installation pour produire des aciers a deux phases WO2000005422A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT99938282T ATE224959T1 (de) 1998-07-24 1999-07-17 Verfahren und anlage zur herstellung von dualphasen-stählen
JP2000561368A JP2002521562A (ja) 1998-07-24 1999-07-17 二相鋼の製造方法及び製造装置
BR9912310-0A BR9912310A (pt) 1998-07-24 1999-07-17 Processo e instalação para fabricação de aços bifásicos do estado laminado a quente
DE59902877T DE59902877D1 (de) 1998-07-24 1999-07-17 Verfahren und anlage zur herstellung von dualphasen-stählen
EP99938282A EP1108072B1 (fr) 1998-07-24 1999-07-17 Procede et installation pour produire des aciers a deux phases
CA2338743A CA2338743C (fr) 1998-07-24 1999-07-17 Procede et installation pour produire des aciers a deux phases

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833321.8 1998-07-24
DE19833321A DE19833321A1 (de) 1998-07-24 1998-07-24 Verfahren und Anlage zur Herstellung von Dualphasen-Stählen

Publications (1)

Publication Number Publication Date
WO2000005422A1 true WO2000005422A1 (fr) 2000-02-03

Family

ID=7875154

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/005113 WO2000005422A1 (fr) 1998-07-24 1999-07-17 Procede et installation pour produire des aciers a deux phases

Country Status (11)

Country Link
EP (1) EP1108072B1 (fr)
JP (1) JP2002521562A (fr)
KR (1) KR100578823B1 (fr)
CN (1) CN1173048C (fr)
AT (1) ATE224959T1 (fr)
BR (1) BR9912310A (fr)
CA (1) CA2338743C (fr)
DE (2) DE19833321A1 (fr)
MY (1) MY124339A (fr)
RU (1) RU2225453C2 (fr)
WO (1) WO2000005422A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004111279A2 (fr) * 2003-06-18 2004-12-23 Sms Demag Aktiengesellschaft Procede et installation pour produire un feuillard lamine a chaud a structure biphasee
CN104001742A (zh) * 2014-05-21 2014-08-27 中冶南方工程技术有限公司 一种对棒材精轧机组之间及机组后的轧件实现控制冷却的方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1013359A3 (fr) 2000-03-22 2001-12-04 Centre Rech Metallurgique Procede pour la fabrication d'une bande en acier multiphase laminee a chaud.
NL1016042C2 (nl) * 2000-08-29 2001-07-24 Corus Technology B V Warmgewalste stalen band, werkwijze voor het vervaardigen ervan, en een daarmee vervaardigde wielschijf.
AUPR048000A0 (en) * 2000-09-29 2000-10-26 Bhp Steel (Jla) Pty Limited A method of producing steel
KR100516519B1 (ko) * 2001-12-26 2005-09-26 주식회사 포스코 제어압연 및 급속냉각 방식에 의한 2상조직 탄소강 선재및 봉강 제조방법
KR100521596B1 (ko) * 2002-11-20 2005-10-12 현대자동차주식회사 직접통전가열에 의한 자동차부품 제조 방법
CN104384207A (zh) * 2014-10-22 2015-03-04 南京钢铁股份有限公司 一种热轧轴承钢棒材的控制冷却方法及其工艺布置
KR102440768B1 (ko) * 2020-12-18 2022-09-08 주식회사 포스코 후강판 제조 장치 및 방법

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488285A1 (fr) * 1980-08-11 1982-02-12 Kobe Steel Ltd
JPS57104650A (en) * 1980-12-19 1982-06-29 Kobe Steel Ltd High-strength hot-rolled steel plate and its manufacture
EP0068598A2 (fr) * 1981-02-20 1983-01-05 Kawasaki Steel Corporation Feuillard d'acier à structure biphasée, laminé à chaud, à haute résistance à la traction et procédé pour sa fabrication
EP0072867A1 (fr) * 1981-02-20 1983-03-02 Kawasaki Steel Corporation Procede de fabrication d'une bande d'acier lamine a chaud presentant une resistance elevee a la traction ainsi qu'un faible module d'elasticite a cause de sa structure mixte
EP0719868A1 (fr) * 1994-12-26 1996-07-03 Kawasaki Steel Corporation TÔles d'acier ayant une résistance élevée aux chocs pour la construction des automobiles et procédé de fabrication de tÔles d'acier
EP0747495A1 (fr) * 1995-06-08 1996-12-11 Sollac S.A. TÔle d'acier laminée à chaud à haute résistance et haute emboutissabilité refermant du niobium, et ses procédés de fabrication

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5818970B2 (ja) * 1978-08-31 1983-04-15 川崎製鉄株式会社 冷間加工性の優れた高張力薄鋼板の製造方法
JPS61170518A (ja) * 1985-01-25 1986-08-01 Kobe Steel Ltd 成形性にすぐれた高強度熱延鋼板の製造方法
JPS6293006A (ja) * 1985-10-18 1987-04-28 Kobe Steel Ltd 高強度熱延鋼板の製造法
KR100301994B1 (ko) * 1996-12-24 2001-11-22 이구택 열간압연선재의균일냉각방법
KR100747495B1 (ko) * 2006-11-10 2007-08-08 삼성전자주식회사 용량가변 로터리 압축기

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488285A1 (fr) * 1980-08-11 1982-02-12 Kobe Steel Ltd
JPS57104650A (en) * 1980-12-19 1982-06-29 Kobe Steel Ltd High-strength hot-rolled steel plate and its manufacture
EP0068598A2 (fr) * 1981-02-20 1983-01-05 Kawasaki Steel Corporation Feuillard d'acier à structure biphasée, laminé à chaud, à haute résistance à la traction et procédé pour sa fabrication
EP0072867A1 (fr) * 1981-02-20 1983-03-02 Kawasaki Steel Corporation Procede de fabrication d'une bande d'acier lamine a chaud presentant une resistance elevee a la traction ainsi qu'un faible module d'elasticite a cause de sa structure mixte
EP0719868A1 (fr) * 1994-12-26 1996-07-03 Kawasaki Steel Corporation TÔles d'acier ayant une résistance élevée aux chocs pour la construction des automobiles et procédé de fabrication de tÔles d'acier
EP0747495A1 (fr) * 1995-06-08 1996-12-11 Sollac S.A. TÔle d'acier laminée à chaud à haute résistance et haute emboutissabilité refermant du niobium, et ses procédés de fabrication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 191 (C - 127) 30 September 1982 (1982-09-30) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004111279A2 (fr) * 2003-06-18 2004-12-23 Sms Demag Aktiengesellschaft Procede et installation pour produire un feuillard lamine a chaud a structure biphasee
WO2004111279A3 (fr) * 2003-06-18 2005-05-06 Sms Demag Ag Procede et installation pour produire un feuillard lamine a chaud a structure biphasee
CN100381588C (zh) * 2003-06-18 2008-04-16 Sms迪马格股份公司 双相组织结构热轧带的生产方法和设备
CN104001742A (zh) * 2014-05-21 2014-08-27 中冶南方工程技术有限公司 一种对棒材精轧机组之间及机组后的轧件实现控制冷却的方法

Also Published As

Publication number Publication date
CN1311826A (zh) 2001-09-05
KR100578823B1 (ko) 2006-05-11
EP1108072B1 (fr) 2002-09-25
DE19833321A1 (de) 2000-01-27
EP1108072A1 (fr) 2001-06-20
BR9912310A (pt) 2004-08-31
ATE224959T1 (de) 2002-10-15
JP2002521562A (ja) 2002-07-16
CN1173048C (zh) 2004-10-27
MY124339A (en) 2006-06-30
KR20010071978A (ko) 2001-07-31
CA2338743C (fr) 2010-03-30
RU2225453C2 (ru) 2004-03-10
DE59902877D1 (de) 2002-10-31
CA2338743A1 (fr) 2000-02-03

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