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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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2

3

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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/ibeamSolidsilo500pxsp.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

outer 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) of metal after it

exits a rolling mill, extrusion die, or drawing process

es, including sheet, bar

, plate, or 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

of the steel

plate to crack

propagation

must be

assessed.

The resistance

of the plate to

a certain load

without

breaking or

deforming

must be

checked.

The resistance of 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

•RUGHER MILL

•EDGER MILL

•FINISHER MILL

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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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