Contents Section Rolling Mod.&Sim.of Met.&Mat.Process - - PDF document

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Contents Section Rolling Mod.&Sim.of Met.&Mat.Process - - PDF document

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28.04.2015 Contents Section Rolling Mod.&Sim.of Met.&Mat.Process History and Overview 1 MET 346E Section Rolling 2 Birsen Ba Can nal Basic Equipments 3 Tuncay akmak Can Berk algam Simulation Bayu Ongunyurt 4 Mehmet

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Section Rolling

ISTANBUL TECHNICAL UNIVERSITY CHEMICAL & METALLURGY ENGINEERING FACULTY 14 April 2015 Istanbul, Turkey

Mod.&Sim.of Met.&Mat.Process MET 346E

Birsen Baş Can Ünal Tuncay Çakmak Can Berk Şalgam Bayçu Ongunyurt Mehmet Reha Savaşeri İbrahim Emre Gülkaya Mammadhuseyn Mammadzada

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Contents

History and Overview Section Rolling Basic Equipments Simulation

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4 1 2 3 5 4 5

2

History of Hot Rolling

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History of Hot Rolling in Iron-Steel

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History of Hot Rolling

  • First industrial use was made of the rolling mill with grooved rolls,

invented by H. Cort of Great Britain in 1783. In time, rolling mills were subdivided into cogging, sheet, and section mills.

  • In the 1830’s and 1840’s, the rapid development of railroads in

various countries led to the use of rolling in the manufacture of rails.

  • In 1856 and 1857 the first mill for rolling large beams was set up in

the Saar, Germany

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Section Rolling

Rolling mills processes includes rolling the billets, blooms, slab and beam blanks into the prescribed size and correcting any roughing, edging and finishing. Blooms are took a control and rolled it into an I-beam.

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I-Beam

I-beams are usually made of structural

  • steel. I-shaped

section is a very efficient form for carrying both bending and shear loads .

*http://www.axionintl.com/images/productsilos/ibeamSolidsilo500pxs p.jpg

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Properties of Plate

  • Yield strengths exceed 300 Mpa
  • Ultimate tensile strength is 10%

more higher than yeld strength

Strength

  • It is respect of the steel’s resistance to

crack propagation.

  • It is ability of the energy absorption

Toughness

  • Steel’s retention of its original

strength and toughness in the vicinity of welded joints.

Weldability

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Process

*http://www.fps.com.fj/wp-content/uploads/2011/09/PAC_STEEL_rolling_mill.jpg

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Reheating

  • Slabs are heated at 1150-1270 °C.
  • Reheated reduces the deformation of

strength of steel.

  • The furnace incorporates machinery to

transport a stream of slabs through it, and is usually fired by gas burners.

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Descaling

  • Removing of the oxide layer to build up on the
  • uter surfaces of the slab.
  • High pressure water sprays (200 bar) are used

to remove it.

*http://steelx.org/content/media/images/hr-plate-descaler.jpg

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Roughing Mill

Eliminate cracking and bending Improved shape control Provides a measure of surface quality

  • Roughing stands are used to reduce the thickness of

steel and to form the metal to roughly the final thickness.

  • A consistent metal temperature at this point in process

is critical for a consistent surface finish and for consistent thickness.

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Finishing Mill

Mill finish refers to the surface texture (or finish)

  • f metal after it

exits a rolling mill, extrusion die,

  • r drawing process

es, including sheet, bar , plate,

  • r structural

shapes

*http://www.gr-inc.com/images/GGT/complete-tube-and-pipe- finishing-lines.jpg

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Finishing Process

  • Cutting discrete plates
  • Removes edge

Shearing

  • Stress relieving process
  • Controlled elongation

Levelling

  • Ultrasound testing applied
  • Grinding may be applied

Inspection

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Performance Tests The resistance

  • f the steel

plate to crack propagation must be assessed. The resistance

  • f the plate to

a certain load without breaking or deforming must be checked. The resistance

  • f the steel

plate to break under a heavy impact must be tested.

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Section Rolling Mill

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Section Rolling

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Section Rolling

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Section Rolling Mills

  • RUGHE

GHER R MILL LL

  • EDGER

GER MILL LL

  • FINIS

ISHER ER MILL LL

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Section Rolling

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Section Rolling

  • 1. Bloom Heating
  • 2. Descaling
  • 3. Rough Rolling

Steps of the Section Rolling

4.Finish Roling (1.stand and 2.stand) 5.Cutting to Length

  • 6. Cooling

Steps of the Section Rolling

  • 7. Straightening
  • 8. Head Hardening
  • 9. Straightening

10.Quality and Dimensional Accuracy Inspection

Steps of the Section Rolling

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  • 11. Straightening

12.Drilling and Trimming

  • 13. Hardening the Rail Ends
  • 14. Final Inspection and Storing

Steps of the Section Rolling

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CSA

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

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Simulation

Thank you for listening…

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