Method of preventing steel coil tensile steel for hot rolled strip

Abstract

The invention relates to a method of preventing steel coil tensile steel for hot rolled strips. The method is characterized in that according to the characteristics of different timing stages of the strip steel entering into the recoiling machine, a method of tension setting adapting to different periods is adopted, the automatic segment control of coiling tension is achieved, a first-small-then-large strategy is adopted, small tension is adopted at the construction stage, after the construction, large tension is adopted, and the tension segment control function of strip steel is achieved through the setting of program modules and through the operation and running of the program modules. The method mainly solves the tensile steel problem arisen from the hot strip rolling production line coiling steel finishing, ensures the uniformity of strip steel width, avoids the tensile steel defects; meanwhile the layer of cold temperatures is not changed, and the steel strength index is not damaged, so as to better guarantee the stability of strip steel size precision and performance indicator and meet user requirements.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for preventing hot-rolled strip steel from coiling and drawing steel. Background technique [0002] When the hot strip steel production line produces low-strength, thin-gauge steel strips, steel drawing problems are prone to occur between finishing rolling and coiling. There are two existing technologies: one is to reduce the coiling tension; the other is to properly increase the strip strength by lowering the interlayer cooling temperature. The former is likely to cause negative problems such as flat coils and tower shapes due to the reduction of tension; the latter directly affects the performance indicators of the strip, which is likely to cause high strength of the strip and affect the processing and use performance of the product. [0003] In the variety structure of the hot strip production line, low-strength and thin-gauge products account for a relatively hig...

AI Technical Summary

Problems solved by technology

Due to the existence of local steel drawing problems, the method of increasing the overall width deviation of the strip is often adopted, resulting in an increase in the amount of edge trimming during pickling in the Kaiping or cold rolling process of downstream users, thereby reducing the yield of finished products and increasing the processing cost of users

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