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

Abstract

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.

Description

technical field [0001] The invention belongs to the production technology of high value-added iron and steel materials, and particularly relates to a production technology with short flow, low cost and low energy consumption. Background technique [0002] As one of the core materials of electrical products such as various motors, transformers and home appliances, silicon steel is mainly used in the production of iron cores, magnetic switches, relays, magnetic shields and rectifiers. With the rapid development of electromechanical and home appliance industries, the demand for silicon steel has been increasing in recent years. As a big consumer of home appliances, my country's consumption and demand for silicon steel is rapidly increasing. However, due to the limitations of production capacity and process technology, silicon steel products are in short supply in the domestic market, and there is a high degree of dependence on imported products. Silicon steel can be divided i...

AI Technical Summary

Problems solved by technology

Although there are some patents on the production process and composition of oriented silicon steel, most of them are for the production method of ordinary oriented silicon steel in the traditional continuous casting and hot rolling process. few

"Method for producing oriented silicon steel strip by continuous casting and rolling of thin slabs" (patent application number: 200510047294.4), it is proposed that the casting speed is 2-3 m / min. This may adversely affect the effect of the inhibitor

"Manufacturing method of low-grade grain-oriented electrical steel sheet" (patent application number: 200510126282.0), the proposed finish rolling temperature is 1050-850 °C, in the actual CSP production process, it often cannot meet the above requirements due to the characteristics of low-temperature heating and low-temperature rolling Requirements for finishing temperature