Air cooling stacking method of hot rolling steel rail

Abstract

The invention discloses a hot-rolled steel air cooling and stacking method capable of reducing bending of a rail to ensure straightness of the straightened rail to meet standard requirement. The method comprises the following steps: A. laterally laying the rolled rail on a collection bracket for cooling; B. turning over the rail during a cooling process by 180 degrees; C. transferring the turned rail to a stacking position for stacking and air cooling. An original upper side of the rail is turned to be a lower side and the original lower side of the rail is turned to be the upper side after turning over the rail which is laterally laid on the collection bracket and cooled by 180 degrees, thus ensuring uniform cooling of the two sides of the rail and substantially equalizing heat storage of the upper side and the lower side of the rail before cooling, further reducing deformation difference resulting from thermal stress and reducing rail bending of the upper side and the lower side. The lateral bending of the straightened rail which is cooled to the room temperature meets the standard requirement.

Description

Technical field [0001] The invention relates to the production of steel rails, in particular to an air-cooled stacking method of hot-rolled steel rails. Background technique [0002] At present, in the production process of rails, stacking and air cooling of rails is a necessary step before rail straightening. "Stacking" refers to stacking steel rails and rails together, stacking them in the intermediate warehouse to be straightened. The rails are in contact with air during stacking and gradually cool down. After the rails are cooled to room temperature (or the temperature required for straightening) at the stacking position, the rails can be sent to the straightening equipment for straightening. [0003] Specifically, the existing steps of stacking and air cooling of rails include: when the rails are rolled out of the rolling line, the rails are first placed on the collecting platform for collection, and the rail heads of the rails are all lying on the north side. On the platfor...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is: in order to overcome the problem that the straightness of the straightened rails does not meet the requirements due to the large bending degree after the rails are stacked and cooled due to the cancellation of the slow cooling pit Air-cooled stacking method for hot-rolled rails with small rail curvature, so as to ensure that the straightness of the rails after straightening meets the standard requirements

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