Quantitative evaluation release method for tiny linear defects on surface of round steel

The invention relates to a quantitative evaluation release method based on round steel surface tiny linear defects, and belongs to the technical field of steel industry production methods. According to the technical scheme, the method comprises the steps that firstly, cracks are qualitatively confirmed, then the sizes and the occurrence probability of the cracks are quantitatively determined, quality evaluation is conducted according to the quantitatively determined sizes of the cracks and the occurrence probability of defects, and whether a product is subjected to coping treatment or not is determined. The method has the beneficial effects that the tiny linear defects on the surface of the round steel can be quantitatively evaluated as a basis for review and release, subsequent grinding treatment of the round steel is guided, quality objection caused by excessive grinding and improper grinding is avoided, the surface quality of a rolled material is guaranteed on the premise of an optimal process route, and t