Production process for middle-width hot rolling strip steel for cold rolling

Abstract

The invention relates to a production process for middle-width hot rolling strip steel for cold rolling, and belongs to the technical field of hot continuous rolling of the metallurgical industry. The technical scheme is as follows: the production process comprises the steps of furnace rotating, refining, continuous casting and steel rolling; the final components include not more than 0.05% of C, not more than 0.013% of S and not more than 0.015% of P, the final temperature is 1630-1650 DEG C, the final slag basicity R is more than or equal to 3, and the ladle oxygen potential is less than or equal to 30 ppm; and the refining time is longer than 30 minutes, the continuous casting temperature is 1545-1560 DEG C, the pulling rate is 1.5 m / min plus / minus 0.05 m / min, the heating temperature is 1100-1200 DEG C, the descaling water pressure is 18 MPa, the finish rolling openning temperature is 850-880 DEG C, the final rolling temperature is more than or equal to 750 DEG C, and the crimp temperature is 700 plus / minus 20 DEG C. The production process has the positive effects that the hot rolling and the finish rolling in a two-phase region are avoided, the mechanical property of a product is optimized, the requirements of the next procedure are met, and the product quality is guaranteed.

Description

technical field [0001] The invention relates to a production process of hot-rolled wide-band steel for cold rolling, which belongs to the technical field of hot rolling in the metallurgical industry. Background technique [0002] With the increasingly fierce competition in the steel market, steel mills must study new techniques and technologies to develop high-quality, low-cost products to seize the market. Especially when producing hot-rolled steel strip for thin gauge cold-rolling, refer to the attached figure 1 , adopting the traditional production process, rolling in the two-phase area is easy to occur, resulting in deterioration of mechanical properties and abnormal structure. The steel is hard, which not only increases the difficulty of production for customers, but also affects their economic interests. Contents of the invention [0003] The purpose of the present invention is to provide a hot-rolled wide-band steel production process for cold rolling, strictly co...

AI Technical Summary

Problems solved by technology

Especially when producing hot-rolled steel strip for thin gauge cold-rolling, refer to the attached figure 1 , adopting the traditional production process, rolling in the two-phase area is easy to occur, resulting in deterioration of mechanical properties and abnormal structure. The steel is hard, which not only increases the difficulty of production for customers, but also affects their economic interests

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