Evaluation of chill structure in ductile cast iron by incremental permeability method

Issue title: Proceedings from the 17th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2015)

Guest editors: Fumio Kojima, Futoshi Kobayashi and Hiroyuki Nakamoto

Article type: Research Article

Authors: Matsumoto, Takanori^a | Uchimoto, Tetsuya^{b; *} | Takagi, Toshiyuki^b | Vertesy, Gabor^c

Affiliations: [a] Graduate School of Engineering Tohoku University, Sendai, Miyagi, Japan | [b] Institute of Fluid Science, Tohoku University, Sendai, Miyagi, Japan | [c] Institute of Technical Physics and Materials Science, Hungarian Academy of Sciences, Budapest, Hungary

Correspondence: [*] Corresponding author: Tetsuya Uchimoto, Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan. Tel.: +81 22 217 5262; E-mail:uchimoto@ifs.tohoku.ac.jp

Abstract: This study aims to quantitatively evaluate the chill structure in ductile cast iron using the incremental permeability method, focusing on the dependence of chill structure on magnetic properties. The relationship between some parameters of the incremental permeability method and the micro-structure of the matrix (ferrite, pearlite, chill) is discussed. As a result, each area fraction of ferrite, pearlite, and chill can be evaluated by multi-parameter analysis. Then, the hardness of the cast iron samples is estimated based on the discussed incremental permeability parameters.

Keywords: Ductile cast iron, chill structure, incremental permeability method

DOI: 10.3233/JAE-162106

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 1599-1605, 2016