球状黒鉛鋳鉄および黒心可鍛鋳鉄の黒鉛粒数について

概要

論文の詳細を見る
It is well known that the graphite nodule number in malleable cast iron is an important factor in determining the graphitization rate. Methods of computing the nodule number per unit volume from the number and size of their intercepts per unit area are established, although they are rather complicated. In this paper an attempt is made to derive a mathematical formula for computing graphite??nodule number per unit volume of spheroidal graphite and malleable cast irons, the results of which were examined in comparison with the experimental data. The results obtained are summarized as follows: (1) Graphite nodule number per unit volume, NV, is related to the number of their intercepts per unit area, NA, by NV=(π/6VG)1⁄2 (αNA)3⁄2 where VG denotes the volume fraction of graphite??nodules in the iron, and α3⁄2 the factor which depends on the distribution of the nodules. (2) α3⁄2 ranges from 1.0 to about 1.4 for ordinary distribution of graphite nodules. (3) NV-NA relationship written above is verified by the experimental data to be valid for spheroidal graphite and malleable cast irons.
Japan Foundry Engineering Societyの論文