Method for reducing deviation angle cracks of plate blank

The invention relates to a method for reducing deviation angle cracks of a plate blank. The method comprises the following steps: 1, analyzing the formation and distribution rules of a liquid/solid slag film and an air gap in a crystallizer; 2, adjusting and testing the taper of a wide edge, and determining the appropriate taper of the wide edge; 3, designing a gasket; 4, reducing the influence of angle seams on the taper of the wide edge; 5, measuring and optimizing the taper of the narrow edge of the crystallizer; 6, controlling the arc of the crystallizer; and 7, monitoring and adjusting the vibration of the crystallizer. According to the method, the online use process of the crystallizer is analyzed, actual use and empirical records are combined, and a wide edge taper optimization scheme of the crystallizer is researched when a single factor changes, so that the taper of the crystallizer and adjustment of a supporting roller set are optimized under complex production conditions, and the deviation angle cr