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Abstract: Analyzing
nodularity, sphericity and dispersivity, a fuzzy evaluation model for
the nodulizing grade of nodular cast iron is firstly set up by means of
fuzzy mathematics. In order to modify and verify the model, many
microstructure of all kind nodulizing grade of China state standard
(GB9441—1988) are analyzed and summarized by the system of image
analysis of the microstructure of nodular cast iron. Finally, a
scientific and overall fuzzy evaluation model for the nodulizing grade
of nodular cast iron is acquired. The method can be used to evaluate
microstructure of other materials, and the result showed that the system
has an important effect for pushing on quantitative metallography.
Key words: Fuzzy
mathematics Nodular cast iron Nodulizing grade
CLC No: TG255
甘肃省科技攻关(GS012-A52-071)和兰州理工大学科研发展基金资助项目.
Received 20030419, received in revised form 20031215 |