Method for controlling subcutaneous slag inclusion of non-quenched and tempered steel containing aluminum and sulfur

The invention belongs to the technical field of metallurgy, and particularly relates to a method for controlling subcutaneous slag inclusion of aluminum-containing and sulfur-containing non-quenched and tempered steel. According to the aluminum-containing and sulfur-containing non-quenched and tempered steel, the technological process of converter-LF refining-RH-continuous casting is adopted, refractory stripping is prevented in the converter and refining process, slag deoxidation is enhanced, impurities are removed, and slag is rolled up; in the continuous casting process, covering slag is prevented from being rolled, and adsorption of slag inclusion and inclusion in a crystallizer is promoted; and finally, in combination with optimization of a finishing flaw detection process, subcutaneous slag inclusion of the round steel is effectively controlled, the flaw detection qualification rate is improved, and meanwhile, the use defect occurrence frequency of a user is effectively reduced. 本发明属于冶金技术领域，尤其涉及一种控制含铝含硫