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Metallurgist

, Volume 58, Issue 5–6, pp 524–527 | Cite as

Assimilation of Advanced Roll Materials in Rolling Production

  • Yu. O. V’yuntsov
  • A. M. Koverzin
  • A. Yu. Romadin
  • V. V. Salomykin
  • E. V. Saprykin
Article
  • 40 Downloads

The EVRAZ ZSMK 250-1 continuous small-section mill specializes in manufacture of rebars Nos. 10 and 12 and equal-flanged angles Nos. 2–4 from billets 100 ×× 100 mm in cross section. Rebar manufacture is carried out by a slitting process from carbon and low-alloy steels for different standards governing rib transverse shape. The life of finishing stand reinforcing passes is mostly determined by channel shape at the bottom of grooves within which transverse ribs are formed. The lowest life of finishing stand passes is observed in rolling crescent shaped ribs. There is surface breakdown in these passes with formation of cracks and spalling. Cracks form during the first use of a set of rolls. Cracks penetrate to a depth up to 15 mm in rolls with high hardness. Tests are performed for different grades of cast iron for rolls of the finishing group with a minimum hardness of 60 HRC to a controlled depth of 15 mm from the roll body surface. The best operating properties are obtained in rolls of cast iron with a spheroidal graphite shape, alloyed with chromium, nickel, molybdenum, and vanadium.

Keywords

roll finishing mill rebar pass life material hardness crack roll spalling lamellar graphite nodular graphite spheroidal graphite bainitic cast iron 

References

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Yu. O. V’yuntsov
    • 1
  • A. M. Koverzin
    • 1
  • A. Yu. Romadin
    • 1
  • V. V. Salomykin
    • 1
  • E. V. Saprykin
    • 1
  1. 1.EVRAZ Consolidated West-Siberian Metallurgical Combine (EVRAZ ZSMK)NovokuznetskRussia

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