Steel quality control method and heat-treated steel manufacturing method

摘要

PPROBLEM TO BE SOLVED: To provide a quality control method of a steel product for providing a customer with quality control information enabling the customer to perform heat treatment surely and efficiently, and to provide a method for manufacturing a heat-treated steel product. PSOLUTION: One or more pieces of information on a composition of a deposit and/or an inclusion, information on a size of the deposit and/or the inclusion, and information on a solid solution amount of a target element in a steel product, are acquired by analysis. Then, at least one of analysis results based on each information acquired in the analysis step is provided to the customer as steel product quality control information for heat-treating the steel product, when shipping the steel product, or separately from shipping of the steel product. PCOPYRIGHT: (C)2010,JPO&INPIT