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Prevention of casting defects
  • Prevention of Defects in Steel Casting Process
    • High-alloy Steel Grades
    • Carbon Steel Grades
    • Low-alloy Steel Grades
    • Medium-alloy Steel Grades
    • Solving Problems Involved in Manufacturing Castings from Acid Steel
  • Prevention of defects in metallurgical products
    • Prevention of defects in steel making process
  • Prevention of Defects in Iron Casting Process
    • Gray Iron (GI)
    • Spheroidal Gray Iron (SGI)
    • Compacted Graphite Iron (CGI)
Contacts
Ещё
    Company
    • Company Profile
    • Certificates
    • Our Team
    • Company Details
    News
    Products
    • Inoculants for steel
    • Inoculants for graphitizing treatment of irons
    • Spheroidizers
    • Master alloys
    • Cored wire
    • Refining materials
    • Ferroalloys
    Engineering support
    Prevention of casting defects
    • Prevention of Defects in Steel Casting Process
      • High-alloy Steel Grades
      • Carbon Steel Grades
      • Low-alloy Steel Grades
      • Medium-alloy Steel Grades
      • Solving Problems Involved in Manufacturing Castings from Acid Steel
    • Prevention of defects in metallurgical products
      • Prevention of defects in steel making process
    • Prevention of Defects in Iron Casting Process
      • Gray Iron (GI)
      • Spheroidal Gray Iron (SGI)
      • Compacted Graphite Iron (CGI)
    Contacts
    Ещё
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      Русский English
      • Company
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        • Company
        • Company Profile
        • Certificates
        • Our Team
        • Company Details
      • News
      • Products
        • Back
        • Products
        • Inoculants for steel
        • Inoculants for graphitizing treatment of irons
        • Spheroidizers
        • Master alloys
        • Cored wire
        • Refining materials
        • Ferroalloys
      • Engineering support
      • Prevention of casting defects
        • Back
        • Prevention of casting defects
        • Prevention of Defects in Steel Casting Process
          • Back
          • Prevention of Defects in Steel Casting Process
          • High-alloy Steel Grades
          • Carbon Steel Grades
          • Low-alloy Steel Grades
          • Medium-alloy Steel Grades
          • Solving Problems Involved in Manufacturing Castings from Acid Steel
        • Prevention of defects in metallurgical products
          • Back
          • Prevention of defects in metallurgical products
          • Prevention of defects in steel making process
        • Prevention of Defects in Iron Casting Process
          • Back
          • Prevention of Defects in Iron Casting Process
          • Gray Iron (GI)
          • Spheroidal Gray Iron (SGI)
          • Compacted Graphite Iron (CGI)
      • Contacts
      • +7 (351) 210-37-37
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      Russia, Chelyabinsk, Vodrem-40, 25, 454901 Phone/Fax: +7 (351) 210-37-37
      npp@npp.ru
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      SPHEROMAG®611, 711, 621, 721, 631, 731

      • Main
      • Product
      • Spheroidizers
      • SPHEROMAG®611, 711, 621, 721, 631, 731
      • Inoculants for steel
      • Inoculants for graphitizing treatment of irons
      • Spheroidizers
      • Master alloys
      • Cored wire
      • Refining materials
      • Ferroalloys
      Download catalog (.pdf)

      Our specialists will answer any of the questions that are of interest to you
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      Methods of inoculation:
      ladle inoculation
      cored wire treatment
      • SPHEROMAG®611, 711, 621, 721, 631, 731
      • Description
      • Packaging
      • Download
      Description

      spheroidizers are predominantly used to treat iron in the ladle when producing castings having pearlite and pearlite-ferrite structures by means of the sandwich process. These castings are in high demand by the machine-building industry where they are used in critical assemblies

      The choice of spheroidizers and their consumption depends on the quality of molten metal, viz: the content in it of such detrimental impurities as sulfur and phosphorus as well as carbide-forming and deglobularizing impurities such as chromium, vanadium, titanium, etc., the saturation of the molten metal with dissolved gases such as oxygen, nitrogen and hydrogen. The more impurities the molten metal contains, the more active components the spheroidizer in question should contain. In fact, the numerical grade designations of spheroidizers indicate the average percentage contents of magnesium, calcium and REM.

      When selecting the grade, it is also necessary to consider the temperature of the molten metal when it is poured from the furnace into a treatment ladle. The higher the temperature, the higher percentage content of calcium should be. Calcium significantly reduces losses of magnesium as it combines with the latter to form an intermetalide whose dissociation temperature is higher than that of magnesium silicide. Calcium contained in spheroidizers not only reduces magnesium losses caused by flare but also reacts with some of the oxygen and sulfur contained in the molten metal, and as a result they exit the melt as slag.

      All spheroidizer grades contain REM whose content does not exceed 1%.They slow down the growth rate of globules, which makes the microstructure of the melt more refined. They also promote binding of non-metallic inclusions thus forming additional graphite crystallization centers, and the strength properties of resultant castings significantly improve.

      Packaging
      Packaging
      • PE-lined big bags with capacities of 0.5 and 1.0 tons
      • Paper bags with capacities up to 25 kg
      • Cored wires
      • Polymer bags with capacities of 1-3 kg packed into big bags
      • Steel buckets and drums
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      Spheromag_Spheromax
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      Company Details
      Product
      Inoculants for steel
      Inoculants for graphitizing treatment of irons
      Spheroidizers
      Master alloys
      Cored wire
      Refining materials
      Ferroalloys
      Contacts


      +7 (351) 210-37-37
      npp@npp.ru
      Russia, Chelyabinsk, Vodrem-40, 25, 454901 Phone/Fax: +7 (351) 210-37-37
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