Prediction model of an oxygen coating weight after decarburization annealing, method for creating same, and method for producing grain-oriented electrical steel sheet

A method for creating a prediction model of an oxygen coating weight after decarburization annealing that is used when producing a grain-oriented electrical steel sheet by subjecting a steel material for the grain-oriented electrical steel sheet to hot rolling, hot strip annealing as necessary, cold rolling once, or cold rolling twice or more with intermediate annealing in between, and decarburization annealing, applying an annealing separating agent containing MgO as a main agent to a steel sheet surface, and then performing finishing annealing (at least one annealing of the hot strip annealing and the intermediate annealing being essential),

• wherein
• the model that predicts the oxygen coating weight after decarburization annealing is created with at least three of steel material components, annealing conditions before final cold rolling, and decarburization annealing conditions set as explanatory variables, and a target variable corresponding to these explanatory variables set as the oxygen coating weight after decarburization annealing, wherein
• the final cold rolling refers to cold rolling of rolling to a final sheet thickness, and the annealing before the final cold rolling refers to hot strip annealing when annealing performed in a step before the final cold rolling is only hot strip annealing, and to intermediate annealing when the annealing is only intermediate annealing or both of hot strip annealing and intermediate annealing.