METHOD OF ESTIMATING MATERIAL OF STEEL PRODUCT.

摘要

A method of estimating the material of steel product on the basis of a final structure of steel, in which metallographic structure of steel is sequentially found by computing metallurgical phenomena on the basis of information about constituents of steel and manufacturing conditions ranging from casting to heat treatment, comprising steps of computing: a temperature of a steel billet on the basis of casting conditions, and the post-casting metallographic structure of steel on the basis of the temperature of the steel billet and information about constituents of steel; a post-rolling metallographic structure of steel on the basis of the pre-rolling metallographic structure and steel temperature calculated from rolling conditions; a post-cooling metallographic structure of steel on the basis of a pre-cooling metallographic structure and steel temperature calculated from cooling conditions; and the material of steel on the basis of a final metallographic structure thereof. Correspondingly to additionally performed manufacturing processes such as re-heating, heat-treatment for uniform diffusion, preparatory rolling, quenching, tempering, and annealing, steps are provided further each computing a metallographic structure of steel after a manufacturing process on the basis of a metallographic structure before that manufacturing process and conditions of that manufacturing process.