Classifications

• • 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
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
  • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
  • B21C47/02—Winding-up or coiling
• • 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
  • B21B45/004—Heating the product

Definitions

• the invention relates to a process for the production of hot-rolled steel strip from continuously cast pre-strip in at least two deformation stages, each with one or more roll stands, in which in the first deformation stage the output strip of the pre-strip rolls out of the continuous casting installation and the intermediate strip produced before the second deformation stage at the exit speed from the first deformation stage is wound into a bundle, which is unwound after reaching the bundle weight and with
• Tapping speed of the second deformation stage is fed to the finish rolling and then wound into the desired finished coil sizes.
• An essential feature of this process is the two-stage rolling process, the first deformation stage of which follows the casting machine directly at the casting speed and the second deformation stage of which is carried out at a significantly higher rolling speed.
• These two rolling process stages are coupled by an intermediate winding system in the form of a reel furnace, in which the continuously cast slab is wound into a bundle after it has been rolled out, the weight of which corresponds to the desired finished bundle weight.
• the subdivision of the strand, which is initially endless, is therefore carried out after the first deformation stage when that coil weight is reached in the coiler that is the same as the weight of the finished bundle after being rolled out in the second deformation stage.
• pre-strips are produced in a continuous casting process and wound into bundles, the weight of which corresponds to the weight of the finished strip bundle.
• the opening act is after
• the coil weight When the coil weight is reached, it is separated in the intermediate winding station and thus decoupled from the casting installation, so that the strip can be unwound into the finishing train at a higher speed. Due to the risk described above when threading the strip head into the reel, the rolling speeds are limited, so that especially when rolling thin hot strips in the
• the size of the intermediate bundle is only limited by the mechanical design of the winding unit and the rolling time with which the finishing train can be operated without changing the roll. It is entirely conceivable to continuously roll entire casting sequences of a continuous casting installation with appropriate winding devices, but at least significantly larger tonnages than is possible on systems according to the prior art.
• the method steps according to the invention increase the buffer capacity of the
• the intermediate band can be wound up into an intermediate bundle both without a mandrel and on a mandrel.
• the metallurgical properties can be changed within an intermediate bundle length.
• the advantages of the present method are the possibility of endless rolling without pre-strip welding, endless rolling with homogeneous pre-strip properties with regard to temperature and geometry, the increase in production of the system due to higher possible rolling speeds, which are no longer restricted by the threading process in the reel, and the creation large buffer capacity between the casting line and the finishing train.
• the method can be used within single or double-strand systems, whereby the winding principle of the preliminary strip can be carried out both in mandrel-type in winding furnaces and without mandrel in so-called coil boxes.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Metal Rolling (AREA)
• Heat Treatment Of Strip Materials And Filament Materials (AREA)
• Heat Treatment Of Steel (AREA)
• Superconductors And Manufacturing Methods Therefor (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7793281

Family Applications (1)

Country Status (10)

Citations (7)

Family Cites Families (4)

• 1996
  • 1996-04-23 DE DE19617856A patent/DE19617856C1/de not_active Expired - Fee Related
• 1997
  • 1997-03-20 ZA ZA9702449A patent/ZA972449B/xx unknown
  • 1997-04-15 DE DE59706562T patent/DE59706562D1/de not_active Expired - Lifetime
  • 1997-04-15 EP EP97921621A patent/EP0904165B1/de not_active Expired - Lifetime
  • 1997-04-15 US US09/171,735 patent/US20010007267A1/en not_active Abandoned
  • 1997-04-15 CN CN97194060A patent/CN1081097C/zh not_active Expired - Fee Related
  • 1997-04-15 AT AT97921621T patent/ATE213974T1/de active
  • 1997-04-15 JP JP53759197A patent/JP4056086B2/ja not_active Expired - Fee Related
  • 1997-04-15 WO PCT/DE1997/000787 patent/WO1997039842A1/de not_active Application Discontinuation
  • 1997-04-15 RU RU98120908/02A patent/RU2170640C2/ru not_active IP Right Cessation
  • 1997-04-21 ID IDP971307A patent/ID19561A/id unknown

Patent Citations (7)

Non-Patent Citations (5)

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