Method for producing low cost oriented silicon steel using continuous casting and rolling technique of sheet bar

The invention relates to a method for producing low-cost oriented silicon steel by the thin slab continuous casting and tandem rolling technique, which belongs to a manufacturing technique for steel materials with high added value. The method is as follows: continuous casting billets with a thickness of between 50 and 120 millimeters are formed by a thin slab continuous casting and tandem rolling device, and enter a soaking furnace for heat preservation at casting speed of between 3.1 and 6 meters per minute when the surface temperature of the casting billets is guaranteed to be not less than 800 DEG C; the continuous casting billets are heated by the soaking furnace and subjected to hot-rolling to form hot-rolling plates with a thickness between 1.5 and 3.5 millimeters; and after the hot-rolling plates are subjected to acid washing, cold rolling, intermediate annealing, cold rolling and secondary recrystallization and annealing, and the structure and the texture required by the oriented silicon steel are obtained, and the magnetism of the products can reach the performance index of the trademark of the oriented silicon steel of the national standard requirement. The method has the characteristic of production of the low-cost oriented silicon steel with the national standard trademark by the thin slab continuous casting and tandem rolling technique used in actual industrial production, has the advantages of short flow, low cost and high production efficiency, and can save the process of normalized annealing by controlling the finishing temperature, so as to further save the cost and improve the production efficiency.