Method for eliminating 1.175 mm high-strength steel oval coiling existing in short-process production

Abstract

The invention discloses a method for eliminating 1.175 mm high-strength steel oval coiling existing in short-process production. The method comprises the steps of control of tension of strip steel, reduction of pressure of a pinch roll, adjustment of coil diameter tension and adjustment of tension distribution in the strip steel coiling process and clockwise rotation of a coiled steel coil after staying. By means of the method, 1.175 mm high-strength steel oval coiling existing in short-process production can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled plate and strip manufacturing, and in particular relates to a method for eliminating short-process production of 1.175mm high-strength steel WJX750-NH by coiling oval coils. Background technique [0002] The process flow of high-strength steel developed by WISCO’s 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 → packaging → leveling →weighing→outgoing. [0003] When the above process is used to produce 1.175mm high-strength steel WJX750-NH, the phenomenon of steel coil ellipse is prone to occur. The steel coil is elliptical, which 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 will be elliptical under the a...

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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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