Manufacturing method of straightening roll for seamless steel tube

The invention discloses a manufacturing method of a straightening roll for a seamless steel pipe, and belongs to the technical field of roll casting, a base body of a working layer of the straightening roll is smelted into molten iron by adopting a medium-frequency induction furnace, a core part adopts a steel pipe lowering mode, and the molten iron is poured by adopting a static casting method to be fully fused with a steel pipe; a matrix structure of the working layer comprises chemical components in percentage by mass as follows: 2.2%-2.4% of C, 1.3%-1.5% of Si, 1.3%-1.5% of Mn, 7.0%-8.0% of Cr, 7.0%-8.0% of Mo, 2.5%-2.8% of Ni, 1.0%-2.0% of W, 1.0%-2.0% of V and the balance of Fe; the steel pipe is made of spring steel. By designing the working layer material and the core material of the roller and changing the combination mode of the working layer material and the core material of the roller, the wear resistance and the service life of the alloy wear-resistant straightening roller prepared by static cast