pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (6권1호 20-26)
A study on the formation of surface solidification layer in compacted/vermicular graphite cast iron
CV흑연주철(黑鉛鑄鐵)에서의 표면응고층(表面凝固層) 생성(生成)에 관(關)한 연구(硏究)
K. S. Park, S. I. Lee, S. Y. Kim
Han Yang University
In order to investigate the solidification characteristics of CV. graphite cast iron, decantation technique and thermal analysis test were used. Solidification characteristics were studied in the specimens with various compositions and graphite shape. The results were as follows; 1. The first surface solidifcation layer is formed along the mold wall by the growth of austenite dendrites in hypoeutectic composition and thin solid film in hypereutectic composition. 2. The mushy degree of solidifcation of hypereutiectic composition is higher than that of hypoeutectic. 3. In hypoeutectic, the effect of change of the mushy degree of solidification on the graphite shape is small, however, in hypereutectic the mushy degree of solidification becomes higher in order of flake, CV, and spheroidal graphite cast iron.