球状黒鉛鋳鉄のサンド・***ージョン摩耗面の形成と進展

概要

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In order to make erosion mechanism of spheroidal graphite cast iron clear, the authors have carried out erosion tests and observed the continuous structural change of vertical section near surface. The erosion mechanism of spheroidal graphite cast iron progresses like this : (1) the spheroidal graphites on the surface layer deform gradually (2) lips grow in the impact direction (3) they expand and drop out. Though the erosion mechanism progresses by this repetitive process of lip-growth and dropping out, the life span is different depending on material. The wear growth rate, which is a standard life span of lip-growth and dropout, becomes smaller according as pearlite ratio increases and corresponds well to the erosion rate. The authors have also confirmed that our continuous observation method is quite practical and useful to elucidate erosion mechanism.
1999-04-25