Internal quality improvement of slabs from caster 3, SMS II RSP with soft reduction technology.
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Transcript of Internal quality improvement of slabs from caster 3, SMS II RSP with soft reduction technology.
Internal quality improvement of slabs from caster 3, SMS II RSP with soft reduction technology
There’s a little bit of SAIL in everybody’s life
SMS-II (Equipments)3 LD Converters3. Ladle heating furnaces. RHOB to be commissioned in near future
3 Conventional Slab CasterCaster-1 & 2 commissioned in 1996, Mansmann Demag makeCaster-3 commissioned in 2013, SMS Siemag Make
There’s a little bit of SAIL in everybody’s life
ROURKELA STEEL PLANT
Advanced facilities in Caster-3 :1. Dynamic Solidification Control2. Soft Reduction3. Online width change4. Hydraulic mould oscillation5. Hydraulic Segment Adjuster6. Online sub entry nozzle change
In continuous casting of semis like slabs blooms center segregation and centre porosity are prevalent.
Due to volume contraction associated with the solidification process of liquid steel the shrinkage cavity is produced at the crater of final solidification region.
The appearance and intensity of center segregation and porosity are normally closely related to steel grade, superheat, casting speed & cooling history.
There’s a little bit of SAIL in everybody’s life
Soft reduction technology is used to compensate the
solidification shrinkage
In this process roll gap is reduced by a calculated
amount in the mushy zone. The compression
produced by the soft reduction enables the
condensed liquid steel to flow in the reverse
direction of casting & also prevents inter dendritic
flow in the transverse direction which may lead to
redistribution of solute elements in the liquid steel
Online soft reduction is used along with DSC model
which accurately predict the mushy zone.
There’s a little bit of SAIL in everybody’s life
There’s a little bit of SAIL in everybody’s life
There’s a little bit of SAIL in everybody’s life
The use of soft reduction technology has improved the acceptability of the slabs for
producing high strength steel with qualified mechanical properties.
The center porosity and center segregation has improved to Mannesmann standard 1 in most of the cases.
There’s a little bit of SAIL in everybody’s life
no soft reduction
There’s a little bit of SAIL in everybody’s life
with soft reduction
There’s a little bit of SAIL in everybody’s life
Thank you
There’s a little bit of SAIL in everybody’s life