SUSCEPTIBILITY TO PRIMARY GRAIN BOUNDARY FRACTURE DUE TO ALUMINUM NITRIDE FORMATION IN STEEL CASTINGS

ANFAELLIGKEIT FUER PRIMAERKORNGRENZENBRUCH DURCH ALUMINUMNITRIDBILDUNG IM STAHLGUSS

The study deals with segregation mechanism of aluminum nitride on the primary grain boundaries of steel castings which results in susceptibility of the castings to fracture. It is shown that aluminum nitride is formed as an undesirable consequence of the conventional addition of aluminum as an efficient oxidizing agent into steelmaking electric arc furnaces. In such a case, the nitrogen content of the steel melt generally is not sufficient to exceed the gas solubility in the melt; on the other hand, however, under equilibrium conditions, it is always sufficient to cause the formation and precipitation of aluminum nitride.

  • Supplemental Notes:
    • Forty-fourth International Foundry Congress, Congr Pap, Florence, Italy, September 11-14, 1977.
  • Corporate Authors:

    Associazione di Metallurgia

    Cent di Fonderia
    Milan,   Italy 
  • Authors:
    • Hoener, K E
    • Baliktay, S
  • Publication Date: 1977

Language

  • German

Media Info

  • Features: References;
  • Pagination: p. 125-140

Subject/Index Terms

Filing Info

  • Accession Number: 00184967
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jan 13 1979 12:00AM