Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
  • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
  • B21B45/0203—Cooling
  • B21B45/0206—Coolants
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
  • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
  • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
  • B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
  • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
  • B21B45/0203—Cooling
  • B21B45/0209—Cooling devices, e.g. using gaseous coolants
  • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
  • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
• • 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
  • C21D8/0236—Cold 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
  • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
  • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
  • C21D1/613—Gases; Liquefied or solidified normally gaseous material
• • 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
  • C21D2221/00—Treating localised areas of an article
  • C21D2221/02—Edge parts
• • 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
  • C21D9/573—Continuous furnaces for strip or wire with cooling

Definitions

• the invention relates to a method for influencing the profile of rolled strip to be cold rolled in at least one roll stand.
• a corresponding roll gap enlargement can also be achieved in the strip edge area by turning off the rolls at the end of the bale.
• edge drop formation by moving the work rolls in accordance with the belt edge. If the formation of edge drops is not counteracted, the rolled strips do not achieve the required strip thickness tolerance over the entire width, so that they cannot be used in this form.
• the invention has for its object to provide a method with which the formation of edge drops can be minimized.
• This cooling can take place, for example, by applying liquid nitrogen to the strip edge regions.
• the strip edge regions are guided through U-shaped housings arranged on both sides of the strip, within which the coolant is applied to the strip edge regions.
• the strip edges of the unrolled strip are thus brought to a lower temperature before they enter the first or the first roll stand.
• the rolled material becomes harder at the strip edge regions, so that it is more difficult to deform. It also contracts a bit at these low temperatures, so it gets thinner.
• this low temperature of the strip edges also affects the bale ends of the rollers that come into contact with them, because the diameter in this area is reduced by the strong cooling. Together, this results in a summation of influences which lead to the band at the band edge regions relative to the central region of the band less rolling, which consequently leads to a significant reduction in edge drops.
• the solution according to the invention is particularly advantageous compared to the known methods because, on the one hand, for example, no complex design of the roll stands is required, as would be required for the work roll displacement.
• cooling boxes are arranged on both sides of the strip to be rolled, which bring the strip to a lower temperature in the opposite strip edge areas as it passes through the strip. With these strongly cooled strip edges, the strip then runs into the roll stand and is rolled there in the usual way, the occurrence of edge drops being prevented or at least substantially reduced by the influences described above.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Metal Rolling (AREA)
• Heat Treatment Of Strip Materials And Filament Materials (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7673645

Family Applications (1)

Country Status (8)

Cited By (1)

Families Citing this family (4)

Citations (7)

• 2001
  • 2001-02-01 DE DE10106273A patent/DE10106273A1/de not_active Withdrawn
• 2002
  • 2002-01-21 JP JP2002560796A patent/JP2004520169A/ja active Pending
  • 2002-01-21 WO PCT/DE2002/000254 patent/WO2002060611A1/de active IP Right Grant
  • 2002-01-21 DE DE50201285T patent/DE50201285D1/de not_active Expired - Lifetime
  • 2002-01-21 CN CNB028042158A patent/CN1230262C/zh not_active Expired - Fee Related
  • 2002-01-21 KR KR1020037008894A patent/KR100821243B1/ko not_active IP Right Cessation
  • 2002-01-21 EP EP02701238A patent/EP1355747B1/de not_active Expired - Lifetime
  • 2002-01-21 AT AT02701238T patent/ATE279271T1/de active
  • 2002-01-24 TW TW091101183A patent/TWI233378B/zh not_active IP Right Cessation

Patent Citations (7)

Non-Patent Citations (5)

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