Method for eliminating edge warping of hot-rolled tool steel

Abstract

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a method for eliminating edge warping of hot-rolled tool steel. The method comprises the following steps that 1, a plate blank is produced by a converter; 2, the plate blank is heated into a furnace, wherein the furnace entering temperature is not lower than 600 DEG C, and the furnace discharging temperature is 1250 DEG C-1300 DEG C; 3, rough rolling is performed on the plate blank heated by the furnace to obtain a steel billet subjected to rough rolling; and 4, finish rolling is performed on the steel billet subjected to rough rolling, a finish-rolled steel billet is obtained, and the finish-rolled steel billet is coiled to obtain a tool steel, wherein the reeling temperature is not higher than 590 DEG C. According to the method, the alloy cost and equipment cost are not increased, the method can be realized only optimizing process and equipment parameters, and is simple, high in applicability, and remarkable in effect.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a method for eliminating warped edges of hot-rolled tool steel. Background technique [0002] Tool steel generally has a high carbon content, and it is generally used in parts such as automobiles or hardware, and customers have higher and higher requirements for its surface. [0003] The linear warping defect that appears on the edge of the strip after hot rolling is a very common and serious defect that affects its surface quality. This defect is highly hereditary. If it occurs, it will Severe linear defects appear during rolling, and these serious warping defects can also cause scratches on the cold-rolled contact rolls. [0004] In the process of realizing the present invention, the applicant finds that there are at least the following deficiencies in the prior art: [0005] In the prior art, in order to eliminate the linear buckling defect at t...

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Problems solved by technology

[0003] The linear warping defect that appears on the edge of the strip after hot rolling is a very common and serious defect that affects its surface quality. This defect is highly hereditary. If it occurs, it will Severe linear defects appear during rolling, and these serious warping defects can also cause scratches on the cold rolling contact rolls

[0005] In the prior art, in order to eliminate the linear buckling defect at the edge of the strip steel after hot rolling, the generally adopted measure is to remove the warping skin at the edge of the hot-rolled strip during pickling and trimming, and then roll it. The distance from the edge sometimes reaches 35mm, and some even need two trimmings to cut off the edge. Using this method will not only cause great waste, affect the yield of finished products, but also reduce the efficiency of steelmaking

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