EP0067374B2 - Procédé de traitement thermo-mécanique de l'acier laminé à chaud - Google Patents

Procédé de traitement thermo-mécanique de l'acier laminé à chaud Download PDF

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Publication number
EP0067374B2
EP0067374B2 EP82104877A EP82104877A EP0067374B2 EP 0067374 B2 EP0067374 B2 EP 0067374B2 EP 82104877 A EP82104877 A EP 82104877A EP 82104877 A EP82104877 A EP 82104877A EP 0067374 B2 EP0067374 B2 EP 0067374B2
Authority
EP
European Patent Office
Prior art keywords
rolling stock
rolling
temperature
subsequent
cooled
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.)
Expired - Lifetime
Application number
EP82104877A
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German (de)
English (en)
Other versions
EP0067374A2 (fr
EP0067374B1 (fr
EP0067374A3 (en
Inventor
Franz Tamm
Bernhard Höricke
Kurt Welfle
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.)
Hennigsdorfer Stahl Engineering Te Hennigsdor GmbH
Original Assignee
Hennigsdorfer Stahl Engineering GmbH
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.)
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Publication date
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Application filed by Hennigsdorfer Stahl Engineering GmbH filed Critical Hennigsdorfer Stahl Engineering GmbH
Publication of EP0067374A2 publication Critical patent/EP0067374A2/fr
Publication of EP0067374A3 publication Critical patent/EP0067374A3/de
Publication of EP0067374B1 publication Critical patent/EP0067374B1/fr
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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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0231—Warm 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
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process

Definitions

  • thermomechanical treatment of rolling stock with which the structure and properties of the rolling stock are favorably influenced by a suitable choice of the forming temperatures, the forming degrees, the forming speeds, the forming times, the dwell time after the forming and the subsequent cooling can.
  • the so-called "controlled rolling” of low-pearlite micro-alloyed steels achieves increased strength properties with good plastic values and good weldability.
  • Controlled rolling in which the rolled steel is formed in the stable austenite range at reduced temperatures, requires special rolling mill equipment with increased drive power and stability.
  • the rolling stock should have a more or less uniform temperature across the cross section in order to achieve homogeneous material properties.
  • the rolling stock is either slowly, e.g. B. with air, cooled or quenched intensively with pressurized water, which then adjusts to temperature compensation.
  • the rolling process is interrupted and the forming is only continued after a certain period of time. Reductions in the performance of the rolling mill cannot be avoided.
  • the invention is based on the object of demonstrating a method for the thermomechanical treatment of rolled steel in continuous hot rolling which enables an improvement in the material properties and a targeted setting of a reduced forming temperature immediately before the finish stitch (s).
  • the surface of the rolling stock is cooled intensively to a temperature above the martensite transformation temperature M s by means of pressurized water in the area a. Subsequently, in the phase of temperature compensation between the surface and the core of the rolling stock, further hot forming takes place in area b. In the colder edge zone, recrystallization is slowed down and, as a result of the treatment, there is a more fine-grained structure in this edge zone than occurs without cooling. As a result of the temperature compensation during shaping, the core temperature drops, which results in a refinement of the structure. In the end, the marginal zone and core show only slight differences in structure.
  • the drawing shows a further cooling stage c following the treatment according to the invention, which contributes to the setting of certain strength properties as well as the previous cooling stage in area a of the drawing, but is carried out with considerably reduced cooling expenditure.
  • the cooling stage indicated by area a in the drawing has a positive effect on the result of any subsequent thermomechanical treatment.
  • the method according to the invention enables the material properties which are optimal for a given steel composition to be achieved.

Landscapes

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

Claims (2)

  1. Procédé de traitement thermomécanique pour le laminage à chaud continu d'acier, notamment de fil et d'acier fin, selon lequel le produit laminé, chauffé à une température d'environ 1100° C pendant la dernière passe, est refroidi à une vitesse de 1800° C par seconde, caractérisé par le fait que la surface du produit laminé est refroidie de 600° C sans descendre au-dessous de la ligne martensite et que le laminé subit une autre déformation à chaud pendant l'équilibrage ultérieur de température entre les bords et le coeur, sous respect d'un taux de déformation d'au moins 10 %.
  2. Procédé suivant la spécification n° 1, dans lequel le laminé déformé au cours de la passe précédente à une température d'environ 1100° C est refroidi en surface à l'eau sous pression.
EP82104877A 1981-06-11 1982-06-03 Procédé de traitement thermo-mécanique de l'acier laminé à chaud Expired - Lifetime EP0067374B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD81230071A DD160457A1 (de) 1981-06-11 1981-06-11 Verfahren zur thermomechanischen behandlung von walzstahl
DD230714 1981-06-11

Publications (4)

Publication Number Publication Date
EP0067374A2 EP0067374A2 (fr) 1982-12-22
EP0067374A3 EP0067374A3 (en) 1983-07-20
EP0067374B1 EP0067374B1 (fr) 1986-12-30
EP0067374B2 true EP0067374B2 (fr) 1995-10-18

Family

ID=5531509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104877A Expired - Lifetime EP0067374B2 (fr) 1981-06-11 1982-06-03 Procédé de traitement thermo-mécanique de l'acier laminé à chaud

Country Status (4)

Country Link
EP (1) EP0067374B2 (fr)
AT (1) ATE24424T1 (fr)
DD (1) DD160457A1 (fr)
DE (1) DE3274812D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH658074A5 (de) * 1982-10-18 1986-10-15 Moos Stahl Ag Verfahren zur verguetung von walzprodukten, vorrichtung zur durchfuehrung des verfahrens und bewehrungsstab hergestellt nach dem verfahren.
DE3518925A1 (de) * 1985-05-25 1986-11-27 Kocks Technik Gmbh & Co, 4010 Hilden Verfahren zum kontrollierten stab- und drahtwalzen legierter staehle
DE19712616C2 (de) * 1997-03-26 1999-07-15 Thyssen Stahl Ag Warmwalzen von Stahlband
RU2735308C1 (ru) * 2019-07-24 2020-10-29 Федеральное государственное автономное образовательное учреждение высшего образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" Способ термомеханической обработки

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2196207A1 (fr) * 1972-08-18 1974-03-15 Morgan Construction Co
CA1028535A (fr) * 1973-11-15 1978-03-28 Bethlehem Steel Corporation Methode de controle thermique au cours du laminage a chaud sur trains continus a chaud
DE2717780B2 (de) * 1977-04-21 1979-11-29 Hamburger Stahlwerke Gmbh, 2103 Hamburg Herstellung von Walzdraht

Also Published As

Publication number Publication date
DD160457A1 (de) 1983-08-03
ATE24424T1 (de) 1987-01-15
DE3274812D1 (en) 1987-02-05
EP0067374A2 (fr) 1982-12-22
EP0067374B1 (fr) 1986-12-30
EP0067374A3 (en) 1983-07-20

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