EFFECT OF DEOXIDIZING METHOD ON QUALITY OF RAIL STEEL

Contact fatigue cracks are the main type of failure in rails. The large streak inclusions of alumina formed as a result of deoxidizing the steel in the ladle with aluminum are dangerous as regards formation of fatigue defects. These harmful inclusions can be eliminated only by altering the method of final deoxidizing. Deoxidizing the steel in the ladle with SK-15 brand calcium-silicon (3.0-3.5 kg/ton) is a more favorable variant. Addition of vanadium, titanium, or some other inoculant is required to reduce grain size. Deoxidizing rail steel with calcium-silicon, with vanadium inoculation at a rate sufficient to produce 0. 03-0.07% V in the metal, has been the subject of the most detailed testing and study. The vanadium is added as ferrovanadium containing 45% V or as ferrosilicovanadium containing 8-14% V, 10-20% Si, 4-8% Mn, 1-4% Cr, and 0.5-2. 0% Ti. Experimental through-hardened rails made from steel deoxidized with the combined deoxidizers FeSiCa and FeSiV (FeV) have been supplied to various sectors of railroad. The possibility of alloying titanium with rail steel is being studied. Satisfactory results have been obtained. The extent of contamination by streak inclusions in steel from heats deoxidized with FeSiCa and FeTi is much less than when aluminum is used.

  • Corporate Authors:

    Consultants Bureau

    227 West 17th Street
    New York, NY  USA  10011
  • Authors:
    • Vinokurov, I Y
    • Rabinovich, D M
    • Syreishchikova, V I
    • Kolosova, E L
    • Evdokimov, A V
    • Baranova, V A
  • Publication Date: 1976

Media Info

  • Pagination: p. 617-618
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00167994
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jan 13 1978 12:00AM