Hot-rolled H-shaped steel and production method thereof

Abstract

The invention discloses hot-rolled H-shaped steel, which comprises a web plate, a first flange plate and a second flange plate; the difference value T1-T2 between the thickness value of the first flange plate and the thickness value of the second flange plate is larger than 0; the ratio of the area difference S1-S2 of the first flange plate and the second flange plate to the area S1 of the first flange plate is not larger than 1, or the ratio of the area difference S1-S2 of the first flange plate and the second flange plate to the area S2 of the second flange plate is not larger than 1. According to the hot-rolled H-shaped steel provided by the invention, the production requirement that the flanges on the two sides of various specifications are different in thickness can be met, meanwhile, lateral bending in the rolling process can be avoided, the metal second flow difference of the flanges on the two sides in the rolling process is controlled within a certain range, and therefore the hot-rolled H-shaped steel with the flanges on the two sides being different in thickness is stably produced. The invention further discloses a production method of the hot-rolled H-shaped steel.

Description

technical field [0001] The invention belongs to the technical field of H-shaped steel, in particular, the invention relates to a hot-rolled H-shaped steel and a production method thereof. Background technique [0002] At present, hot-rolled H-beams are all produced by universal rolling, and the rolled pieces are double-symmetrically rolled (in the height and width directions) in an "H" shape during the universal rolling stage. Among them, the upper and lower horizontal rolls roll and compress the web in the thickness direction, and the vertical rolls on both sides respectively roll and compress the flanges on both sides in the thickness direction. If the thickness or width of the flanges on both sides is not controlled during the rolling process, there will be a gap in the metal second flow of the flanges on both sides, resulting in different rolling extensions on both sides, and the rolled piece will inevitably appear side bending, which will affect the The second bite. I...

AI Technical Summary

Problems solved by technology

This patent has strict restrictions on the ratio of the thickness of the flanges on both sides of the hot-rolled H-shaped steel, and the difference between the thickness of the flange and the web. If the size exceeds the range, it will cause serious side bending during the rolling process, or obvious flange surface waves. Or web surface wave defects affect the actual use; in addition, this method can only produce H450*150 series specifications, for larger or smaller specifications, because the area ratio of flange and web is different from this specification, then this method not applicable

[0004] At present, there is no disclosed method in the prior art, which can produce hot-rolled H-beams of various specifications with unequal thicknesses on both sides of the flange

Images