Preparation method of food contact baking tray steel, food contact baking tray steel and baking tray

The invention relates to a medium-thickness plate product applied to the field of food, in particular to food contact baking tray steel and a preparation method thereof. The technical problem to be solved by the invention is to meet the strict requirements of harmful elements to meet the requirements of food contact while ensuring that the baking tray steel product meets the mechanical requirements. And meanwhile, narrow hardness fluctuation control is required, so that good hardness matching of the baking tray steel and contact kitchen ware products is realized. The actual application scene requirement of the product is extremely high in the plate shape requirement of the high-strength steel under the actual cold and hot cycle working condition, and the higher requirement for the plate shape of the steel plate is put forward. The invention relates to a preparation method of food contact baking tray steel, which comprises the steps of ironmaking, steelmaking, casting blank heating, rolling, straightening, pit