Method and device for improving internal stress distribution of strip steel

Abstract

The invention discloses a method and a device for improving internal stress distribution of strip steel. The method includes the following steps that a reverse bending roller having the preset rollerdiameter is arranged in the strip steel uncoiling position of a unit uncoiling machine, and the strip steel is bent reversely in the uncoiling position by the aid of the reverse bending roller; the position of the reverse bending roller is adjusted, the strip steel produces a preset wrap angle on the reverse bending roller, the strip steel is bent sufficiently reversely by the aid of the roller diameter of the reverse bending roller, and the irregular original internal stress of the strip steel is converted into the regular internal stress in the double-broken-line distribution form; a straightening machine is arranged behind a turning roller, repeated forward and reverse bending is performed on the strip steel by the aid of the straightening machine, the internal stress in double-broken-line distribution is converted into the internal stress in multiple-broken-line distribution, and thus homogenization treatment is performed on the unified internal stress distribution; and uncoiling production is performed on a cold-rolled or hot-rolled strip steel coil. By the aid of the method and the device, the effect of improving the internal stress distribution of the strip steel is achieved, and multiple quality defects caused by internal stress release can be avoided during 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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