A method and device for improving the internal stress distribution of strip steel

Abstract

A method and device for improving the internal stress distribution of strip steel. The method includes: setting a reverse bending roll with a preset roll diameter at the strip uncoiling position of the uncoiler of the unit, and forming the strip steel at the uncoiling position through the reverse bending roll. Reverse bending; adjust the position of the reverse bending roller to make the strip produce a preset wrap angle on the reverse bending roller, use the roll diameter of the reverse bending roller to make the strip fully reverse bend, and make the irregular original shape of the strip steel Internal stress is transformed into internal stress in the form of regular double-broken line distribution; a straightening machine is installed behind the steering roller, and the strip is bent forward and reverse for many times by using the straightener, so that the internal stress distributed by double-broken lines is transformed into that of multi-broken line distribution. Internal stress, so as to homogenize the uniform internal stress distribution; uncoil production of cold-rolled or hot-rolled strip steel coils. Through the invention, the effect of improving the internal stress distribution of the steel strip is achieved, and many quality defects due to the release of internal stress will not occur in subsequent processing.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method and a device for improving the internal stress distribution of strip steel. Background technique [0002] In the production of strips, hot-rolled steel coils have been cooled from high temperature through laminar flow and indoor air cooling to room temperature or cold-rolled strips have been annealed and cooled. Different, there will be uneven cooling, which will lead to irregular distribution of internal stress inside the strip. In the subsequent rolling, shearing, aging and other processing, the internal stress is continuously released to produce waves, scoops, and side bends. Such quality defects seriously affect the quality of finished products and cause many quality objections. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention provides a method for improving the internal stress distribution of st...

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Problems solved by technology

[0002] In the production of strips, hot-rolled steel coils have been cooled from high temperature through laminar flow and indoor air cooling to room temperature or cold-rolled strips have been annealed and cooled. Different, there will be uneven cooling, which will lead to irregular distribution of internal stress inside the strip. In the subsequent rolling, shearing, aging and other processing, the internal stress is continuously released to produce waves, scoops, and side bends. Such quality defects seriously affect the quality of finished products and cause many quality objections

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