Abrasion Resistance and Corrosion Resistance of Niobium Carbide-Dispersed High Cr-Ni Cast Iron

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  • ニオブ炭化物が分散した高Cr-Ni鋳鉄の耐摩耗性と耐食性
  • ニオブ タンカブツ ガ ブンサン シタ コウCr Ni チュウテツ ノ タイマモウセイ ト タイショクセイ

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In recent years, the demand for durable materials for long-lasting machine parts, which are used at manufacturing plants, is increasing. For this reason, vanadium carbide-dispersed cast iron (high V-Cr-Ni cast iron) with excellent corrosion resistance and abrasion resistance was developed. This high V-Cr-Ni cast iron was prepared by dispersing vanadium carbide (VC) in a matrix. Further improvements to the mechanical properties can be achieved by dispersing spheroidal VC in the matrix through magnesium treatment. The development of these materials is expected to contribute to improved productivity and reduced labor cost as a result of decreased replacement frequency of machine parts. <br>  In this study, we focused on niobium (Nb), which is less expensive than V and is a strong carbide-forming element. High Cr-Ni cast iron was prepared by dispersing niobium carbide (NbC) in an austenitic matrix, and the abrasion resistance and corrosion resistance were evaluated. We found that NbC-dispersed cast iron containing up to 11.6mass% Nb could be made.

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