〈Original Papers〉Evaluation Method of Graphite Nodularity in Spheroidal Graphite Cast Iron Using Image Analysis

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  • 〈研究論文〉画像解析を用いた球状黒鉛鋳鉄の黒鉛球状化率の評価方法

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The mechanical and physical properties of spheroidal graphite cast iron are strongly influenced by the graphite shape when matrix structure is the same. Therefore, the measurement of graphite nodularity, which evaluates the roundness of graphite, is a very important evaluation standard. Recently, image processing technology has been developed and inexpensive image processing software is on the market, so it is often used. However, it is note that the measurement method for image processing differs depending on the software. Furthermore, the method of calculating the graphite nodularity using image analysis has some problems. Therefore, examined the difference in measured values caused by image processing software and established a measurement method that doesn’t cause human error.

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