Effects of Niobium Content on MC Carbide Segregation in Multi-component White Cast Iron by Centrifugal Casting

DOI

Bibliographic Information

Other Title
  • 遠心鋳造における多合金系白鋳鉄のMC炭化物の偏析に及ぼすニオブ含有量の影響

Abstract

<p>  Multi-component white cast iron containing Cr, Mo, W, V has excellent abrasive wear resistance due to the MC carbide with high hardness. In the centrifugal casting, since the MC carbide formed by V has a lower specific gravity than that of molten metal, there is a tendency to segregate itself toward the inside because of the centrifugal force. As a measure to solve this problem, it has been proposed to add Nb which forms the same type of MC carbide with a high specific gravity and to suppress the segregation by making the composite M (V, Nb) C carbide crystallize. In this research, the effect of Nb content on the degree of segregation was investigated. In the hyper-eutectic region, Nb with a higher specific gravity was enriched outward by the centrifugal force. In the hypo-eutectic region, a simultaneous enrichment of Nb and V was observed near the inner surface. Although the effective range of Nb content must be limited, the possibility to reduce the segregation by Nb-addition was confirmed.</p>

Journal

Keywords

Details 詳細情報について

  • CRID
    1390299318867717376
  • DOI
    10.11279/jfes.96.62
  • ISSN
    21855374
    13420429
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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