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Production of High-Strength Plates Through New Plate Mill at RSP

  • Sanjay Kumar Gupta
  • Suman Kant Thakur
  • Kuntal Patwari
  • Manish Kumar Singh
  • Abdhesh Prasad
  • Amit Pradhan
  • Somnath Ghosh
  • Basudev Mishra
Chapter
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

The production of value-added plates with stringent international standards has been established at RSP, Rourkela through new plate mill. The mill is equipped with state-of-the-art technology to produce up to 4.2 m wide plates with close tolerances. For enhancing the mill capacity, wide range of special steel grades is identified to produce in the dimensions of 6–100 mm (thickness), 1500–4100 mm (width) and 6300–15,000 mm (length) with superior surface finish. The necessary high-quality thick and wide defect free slabs (both internal & external) are cast at newly installed Slab Caster-3. The productivity and quality of the liquid steel has been ensured by the successful implementation and production from new Blast Furnace-5, BOF-3 and RHOB. This paper elaborates the efforts made for improvement and optimization of steelmaking and rolling practices for the production of special quality high-strength plates such as IS 2062, E350/E410/E450 and API X70, etc. The major modifications were carried out in each stage of its production, i.e., BOF steelmaking and secondary refining to optimize the quality of steel with respect to lower residue of sulfur and phosphorus and rolling of slabs in the plate mill. Reduction in UST failure of the plates has been observed for the liquid steel processed through newly commissioned RHOB at the shop. The rolling parameters were optimized to achieve the desired mechanical properties, however ultrasonic soundness of the plates were found to be more dependent on clean steel than the higher reduction schedule given during initial passes at plate mill.

Keywords

High strength steel Thick and wide plate Sulphur and phosphorus control Dynamic soft reduction RHOB 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Sanjay Kumar Gupta
    • 1
  • Suman Kant Thakur
    • 1
  • Kuntal Patwari
    • 2
  • Manish Kumar Singh
    • 3
  • Abdhesh Prasad
    • 1
  • Amit Pradhan
    • 2
  • Somnath Ghosh
    • 1
  • Basudev Mishra
    • 1
  1. 1.RDCIS, SAILRanchiIndia
  2. 2.RSP, SAILRourkelaIndia
  3. 3.RDCIS, SAILRourkelaIndia

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