Production method of thin gauge low carbon steel by ferritic rolling in csp production line

Abstract

The invention relates to a production method for producing thin-gauge low-carbon steel by ferrite rolling in a CSP production line. Under the equipment conditions of the rolling stand and the intermediate water cooling device, the production of high-precision hot-rolled products with a thin specification of 1.0-2.0mm is realized. The product performance is: yield strength 180-280MPa, tensile strength 300-380MPa, elongation ≥ 38%, yield The strength ratio is 0.55~0.75, the thickness tolerance is controlled within ±30μm, the performance and thickness accuracy reach the level of cold-rolled products of the same specification, and "replacing cold with heat" can be realized.

Description

technical field [0001] The invention relates to the technical field of strip steel production, in particular to a production method for producing thin-gauge low-carbon steel by adopting ferrite rolling in a CSP production line. Background technique [0002] CSP is a thin slab continuous casting and rolling technology researched and developed by German SMS, called compact strip steel production technology. The typical process flow of CSP is: (electric furnace or) converter → ladle refining furnace → thin slab continuous caster → soaking furnace → hot continuous rolling mill → laminar cooling → underground coiling. The thickness of the slab drawn from the continuous casting slab is less than 70 mm, and it is rolled into a strip steel of 0.8 to 12.5 mm through 4 to 7 finishing mills. [0003] Ferritic rolling was first developed by the Belgian Iron and Steel Research Center in the late 1980s. It can be used to produce a cheap, soft, non-aging steel that can be used directly or...

AI Technical Summary

Problems solved by technology

For the thin slab continuous casting and rolling production line, when the traditional austenitic rolling is used to produce low carbon steel, due to the high pass reduction rate and the fine grain of the product, the yield strength is high, the yield strength ratio is high, and the formability is relatively low. Difference

Although thin slab continuous casting and rolling has the advantages of producing thin-gauge products, the yield strength and yield strength ratio of thin-gauge low-carbon steel are higher than those of cold-rolled products of the same specification, and the formability is poor, which limits its ability to "replace cold with heat"

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