Masatoshi Tsuda

INVESTIGATION ON CAST IRON HAVING REFINED GRAPHITE PRODUCED BY MELTING CAST IRON COVERING WITH SLAG CONTAINING TiO 2 (IX): Investigation on the Net Structure and the Estimation of Micro-Hardness of S-H Cast Iron@@@S-H鋳鉄の網目組織ならびに微小硬度測定

portion) was consisted of eutectic graphite structure. Both the micro-hardnesses of boundary-line and meshy portions were estimated. The results proved that the hardness of boundary-line portion was about 1.5~2.7 times of meshy portion. The authors presumed that one of the major reasons of the greater wear-resistance of S-H cast iron was based upon the following characteristics: 1. The existence of a unique net structure of S-H cast iron. 2. The presence of a boundary-line portion of greater hardness in the matrix of eutectic