Bearing steel small square billet grading control system

The invention discloses a bearing steel small square billet grading control system. The system comprises a monitoring and grading module, a grading and rolling module and a tracking verification module; the monitoring and grading module is used for recording and monitoring the pouring superheat degree and grading casting billets according to the superheat degree and macroscopic quality in the pouring process; the grading and rolling module is used for carrying out graded feeding and rolling on the casting billets graded by the monitoring and grading module, and rolling rolling materials of the same grade or the rolling materials with the grade lower than that of the casting billets after grading the casting billets; and the tracking verification module is used for tracking and verifying the quality of casting billet rolled metal of the grading and rolling module. According to the grading control system, on the basis of the superheat degree and the macroscopic quality, grading control is conducted on primary-q