Kabushiki Kaisha Kobe Seiko Sho

Junichi Ohsako

Motohisa Miyafuji

Yosuke Miwa

Isao Hosokawa

Syuhei Mori

Conductivity distribution on the cross section of metal or alloy is measured by an eddy current type conductivity meter and conductivity distribution contour map is prepared. Based on the pattern of this conductivity distribution contour map, heat history of an ingot and segregation of added element are analyzed and melting and/or casting conditions of metal or alloy are re-established. This method allows to carry out the testing and analysis within short time and quickly provides assessment results for re-establishment of melting and/or casting conditions. Thereby, metal or alloy ingots which may create poor quality products during the following steps can be eliminated; in particular, applying this method to a manufacturing of copper precipitation hardening alloy and the like, more sound ingots can be obtained and suitability of ingots for the material which should be worked in the following step can be assessed.

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Shimonoseki, Japan

Junichi Ohsako