Method for producing medium carbon hot-rolled trip steel based on esp thin slab continuous casting and rolling process

Abstract

The invention provides a method for producing medium-carbon hot-rolled TRIP steel based on an ESP thin-slab casting and rolling process. The method includes the steps that raw materials are selected, the raw materials include, by mass, C 0.10-0.30%, Si 1.0-2.0%, Mn 1.0-2.0%, S <=0.012%, O <=0.01%, P <=0.020%, N <=0.008% and the balance iron element; the raw materials are subjected to converter smelting and LF furnace smelting sequentially; molten steel formed through LF furnace smelting forms hot-rolled strip steel of different thicknesses through an ESP production line, wherein in the ESP production line, the temperature of a rough rolling outlet is 800-860 DEG C, and the temperature of a finish rolling outlet is not lower than 800 DEG C; the required proportions of ferrite and bainite in the hot-rolled strip steel are sequentially determined through secondary cooling of the hot-rolled strip steel, and then the hot-rolled strip steel is fed into a reeling machine for reeling and warehousing. By utilizing the method, the problem that the head and tail thicknesses of the medium-carbon hot-rolled TRIP steel are out of tolerance can be solved, and the purpose of saving energy, protecting the environment and reducing the costs are achieved.

Description

technical field [0001] The invention relates to the technical field of iron and steel, and more specifically, relates to a method for producing medium-carbon hot-rolled TRIP steel based on the ESP thin slab continuous casting and rolling process. Background technique [0002] In recent years, with the continuous decline of the steel market, steel has been in a state of meager or no profit, forcing steel manufacturers to explore ways to reduce costs. High-strength steel is mainly used in construction machinery, transportation and vehicle manufacturing industries. The use of thin-gauge high-strength steel can not only reduce steel consumption and production costs for enterprises manufacturing vehicle parts and lifting and transportation equipment, but also reduce fuel consumption costs for users. At present, the world's energy, resource and environmental protection problems are becoming increasingly severe, and it is an urgent need to achieve high strength, light weight, energ...

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Problems solved by technology

[0006] In view of the above problems, the purpose of the present invention is to provide a method for producing medium-carbon hot-rolled TRIP steel based on the ESP thin slab continuous casting and rolling process, to solve the problem of excessive thickness of the medium-carbon hot-rolled TRIP steel head and tail, to achieve energy saving and environmental protection and cost reduction

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