A method for eliminating short process to produce 1.175mm high-strength steel coiled oval coil

Abstract

The invention discloses a method for producing 1.175mm high-strength steel coiling elliptical coils by eliminating short process flow. The method includes controlling the strip steel unit tension, reducing the pinch roller pressure, adjusting the coil diameter tension, and adjusting the tension during the strip steel coiling process. distribution, and clockwise rotation after the coil stays after coiling. The invention can eliminate the short-flow production of 1.175mm high-strength steel coiled oval coils.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled sheet and strip manufacturing, and in particular relates to a method for producing 1.175mm high-strength steel WJX750-NH coiled elliptical coils by eliminating short processes. Background technique [0002] The process flow of high-strength steel developed by WISCO Thin Slab Continuous Casting and Rolling CSP is: desulfurization → converter → argon blowing → ladle furnace → vacuum furnace → continuous casting → soaking furnace → finishing rolling → layer cooling → coiling → packing → smoothing →Weighing→Outgoing. [0003] When using the above process flow to produce 1.175mm high-strength steel WJX750-NH, the phenomenon of steel coil oval coil is prone to occur. The oval shape of the steel coil means that after the steel coil is pulled out from the reel of the coiler, the gravity of the steel coil will be completely borne by the steel coil itself, and the steel coil presents an oval shape under...

AI Technical Summary

Problems solved by technology

[0004] The elliptical steel coil needs to take certain measures to be equipped with the leveling unit, such as artificial flame cutting of the inner ring of the steel coil to expand the inner diameter, which will increase extra manpower, material resources, and increase production costs, seriously affecting production efficiency and product quality Rate

At the same time, the circumferential speed of the steel coil with large ellipticity is inconsistent during the unleveling process, and the tension fluctuates violently, which may easily cause scratches on the surface of the steel coil, which will eventually affect the use of the user, resulting in product degradation or rejection, resulting in large economic losses; serious ellipse The steel coils cannot be finished even if the internal control is manually expanded. They can only be scrapped.

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