Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
  • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
• • 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
  • B21B1/46—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 metal immediately subsequent to continuous casting
  • B21B1/463—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 metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
  • B22D11/12—Accessories for subsequent treating or working cast stock in situ
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
  • B22D11/12—Accessories for subsequent treating or working cast stock in situ
  • B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
• • 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
  • C21D8/021—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular fabrication or treatment of ingot or slab
  • C21D8/0215—Rapid solidification; Thin strip casting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
  • B21B2015/0071—Levelling the rolled product
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
• • 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
  • 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
  • C21D8/0231—Warm rolling

Definitions

• the tape has an uneven structure in this production. Particularly in the case of alloys with a multi-phase solidification structure, dendrites reaching from the edge zones to the middle of the strand occur. This unwanted microstructure cannot be removed by subsequent rolling alone. It is therefore customary, after casting, to store the strip temporarily and to subject it to a structure-refining treatment in a separate process.
• the invention has for its object to provide a method with which a metal strip with a fine-grained or homogenized structure can be produced continuously.
• the invention is also based on the object of creating a suitable system.
• the invention is based on a method for producing a metal strip with a thickness of up to 10 mm, in which a molten metal is poured into a strip and the strip is subjected to a plastic deformation and heat treatment in one line and then passes through a cooling section.
• a molten metal is poured into a strip and the strip is subjected to a plastic deformation and heat treatment in one line and then passes through a cooling section.
• the strip is cast in a thickness close to the final dimensions and that the plastic deformation of the strip takes place at an elevated temperature and almost a reduction in thickness.
• the temperature at which the plastic deformation takes place is lower than the temperature at which an annealing treatment then takes place.
• the plastic deformation can take place simultaneously with the annealing treatment.
• the annealing treatment should take place in a protective gas atmosphere. Even if the annealing treatment does not take place simultaneously with the plastic deformation and thus at a lower temperature, it is advantageous if the plastic deformation also takes place in a protective gas atmosphere.
• the plastic deformation without a substantial reduction in the thickness of the band is preferably carried out by repeatedly bending the band around and parallel to the plane of the band Belt direction vertical axes.
• the invention further relates to a system for producing the metal strip with a thickness of up to 10 mm.
• a system for producing the metal strip with a thickness of up to 10 mm consists of a system arranged in a line, namely one
• Belt casting device a heat treatment section and / or temperature compensation section, a deformation unit which plastically deforms the strip and a cooling section arranged at the end of the line.
• the deformation unit is set up for a meandering passage of the belt in the manner of a straightening device.
• the temperature compensation section is preferably arranged in front of the deformation unit. If the
• Heat treatment section is set up for annealing, it is either integrated into the deformation unit or arranged downstream of it.
• the parts of the plant should be thermally separated from one another.
• the temperature compensation distance and the heat treatment distance must be set, depend on the material of the strip and whether the strip is to be subjected to a recrystallization annealing or whether it should be annealed for structural homogenization. If a fine-grained structure is sought for steel, for example, a temperature range of 700 to 1000 ° C has proven itself for recrystallization annealing. In the case of annealing for the purpose of structural homogenization, however, the annealing should take place at a temperature above 1000 ° C.
• the invention is explained in more detail below with reference to a drawing which schematically shows two plants in side view, with which the two alternative methods can be carried out.
• Molten metal is applied from a casting vessel 1 filled with molten metal via an outlet gap with an adjustable gap width to the smooth, cooled outer surface of a rotating cooling wheel 2.
• the width of the outlet gap and the running speed of the cooling wheel 2 By adjusting the width of the outlet gap and the running speed of the cooling wheel 2, the thickness of the band 3 which solidifies on the outer surface can be adjusted to a thickness of up to 10 mm.
• the belt 3 Forming a loop, the belt 3 reaches the area of a first pair of rollers 4.
• the casting vessel 1 with its outlet gap, the cooling wheel 2 and the pair of rollers 4 are accommodated in a chamber 5 which is closed to the outside atmosphere and filled with protective gas.
• the strip material is brought to a temperature dependent on the strip material in the chamber 6, which temperature is favorable for the plastic deformation in the subsequent chamber 7.
• the belt 3 is meandered over rollers 9 and plastically deformed, which are arranged between a pair of brake rollers 10 and a pair of pull rollers 11.
• This type of treatment of tape 3 corresponds to the treatment of one Tape in a straightener.
• recrystallization annealing can be carried out, which, however, is then preferably carried out in a protective gas atmosphere.
• the strip is then cooled in accordance with a predetermined program.
• the treatment takes place in the same chamber 7 immediately after casting the strip in chamber 5.
• the plastic deformation is not associated with a recrystallization annealing, rather the temperature of chamber 7 is increased to that for plastic Deformation set favorable temperature.
• the treatment should also be carried out under a protective gas atmosphere. Only after this plastic deformation does recrystallization annealing take place in chamber 6, preferably under a protective gas atmosphere.
• the chamber 8 is then cooled again according to a program dependent on the strip material.
• the invention differs from the prior art in that the strip produced by casting is continuously treated further, so that at the end of the treatment a strip is obtained which, in contrast to the strips produced according to the prior art, has a fine-grained cross-section over its entire cross section or homogenized structure, depending on the treatment temperature.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Thermal Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Physics & Mathematics (AREA)
• Continuous Casting (AREA)
• Heat Treatment Of Strip Materials And Filament Materials (AREA)
• Metal Rolling (AREA)
• Coating With Molten Metal (AREA)
• Heat Treatment Of Steel (AREA)
• Crystals, And After-Treatments Of Crystals (AREA)
• Heat Treatment Of Sheet Steel (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6357606

Family Applications (1)

Country Status (6)

Cited By (3)

Families Citing this family (3)

Citations (3)

Family Cites Families (3)

• 1989
  • 1989-06-24 JP JP1506984A patent/JPH03505704A/ja active Pending
  • 1989-06-24 AT AT89907154T patent/ATE81314T1/de not_active IP Right Cessation
  • 1989-06-24 DE DE8989907154T patent/DE58902433D1/de not_active Expired - Lifetime
  • 1989-06-24 WO PCT/EP1989/000712 patent/WO1990000100A1/de not_active Application Discontinuation
  • 1989-06-24 DE DE89EP8900712A patent/DE3990711D2/de not_active Expired - Lifetime
  • 1989-06-24 EP EP89907154A patent/EP0422056B1/de not_active Expired - Lifetime
• 1990
  • 1990-12-28 RU SU904894577A patent/RU1839682C/ru active

Patent Citations (3)

Non-Patent Citations (4)

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