Method for preparing S355MC steel coil based on multi-mode sheet billet continuous casting and rolling production line and product obtained from method for preparing S355MC steel coil based on multi-mode sheet billet continuous casting and rolling production line

Abstract

The invention belongs to the technical field of metal material machining and steel, and particularly relates to a method for preparing an S355MC steel coil based on a multi-mode sheet billet continuous casting and rolling production line and a product obtained from the method for preparing an S355MC steel coil based on a multi-mode sheet billet continuous casting and rolling production line. The method for preparing the S355MC steel coil based on the multi-mode sheet billet continuous casting and rolling production line comprises the following steps that smelting and continuous casting are carried out to obtain a sheet billet, the sheet billet is sequentially subjected to heating treatment, descaling before rough rolling, rough rolling, electromagnetic induction heating, descaling before finish rolling, finish rolling, laminar cooling, coiling and cooling, and an S355MC steel coil is obtained; and the sheet billet comprises the following components of, in percentage by mass, 0.03%-0.15% of C, smaller than or equal to 0.05% of Si, 0.6%-1.5% of Mn, 0.02%-0.35% of Al, smaller than or equal to 0.010% of P, smaller than or equal to 0.005% of S, 0.01%-0.10% of Nb, smaller than or equal to 0.005% of N, and the balance iron and inevitable impurities. The method for preparing the S355MC steel coil expands the thickness range of the final product S355MC steel coil, and has the advantagesof short production line, short process, energy conservation, emission reduction and cost reduction.

Description

technical field [0001] The invention belongs to the technical field of metal material processing and iron and steel, and specifically relates to a method for preparing S355MC steel coils based on a multi-mode thin slab continuous casting and rolling production line and its products. Background technique [0002] At present, driven by factors such as cost reduction, energy saving and emission reduction, process shortening, and efficiency improvement, the market demand for high-performance thin hot-rolled strip steel continues to grow, and endless rolling technology is increasing the proportion of ultra-thin strip steel products, It has achieved remarkable results in terms of yield, size and shape accuracy, uniformity of structure and performance, reduction of energy consumption, roll consumption, energy saving and emission reduction. [0003] High-strength steel has become a new generation of environmentally friendly materials because it can achieve weight reduction, energy s...

AI Technical Summary

Problems solved by technology

[0004] However, the thickness range of the S355MC steel coil produced by the current thin slab continuous casting and rolling production line is too narrow, the rolling mode that can be realized is limited, the production line is too long, the process is too long, and the energy saving, emission reduction and life In terms of cycle, there is no advantage

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