A special steel large bar rolling line and rolling method

Abstract

The invention discloses a special steel large bar rolling line and rolling method, using a semi-continuous rolling rolling production line of "7 racks rough rolling + head-off roller table + 8 racks intermediate finishing rolling", specifically including sequentially setting The 1# pinch roll, rough rolling unit, hydraulic shear, head-off roller table, 2# pinch roll, middle finishing rolling unit and double-length shear. The 7 rough rolling stands are arranged alternately, using two-roller short stress line rolling mill, 1#-2# roll diameter φ950mm, cast steel rolls that can be surfacing, and 3#-4# roll diameter φ800mm, cast steel can be surfacing Roll, 5#-7# rolling mill roll diameter φ700mm, using pearlitic nodular molybdenum cast iron II roll. The 8 middle finishing mills are alternately arranged horizontally and vertically and all adopt two-high short stress line rolling mills. The rolling process based on this rolling line can not only ensure the quality of special steel large bars, but also improve the production efficiency of the large bar production line, and greatly reduce the investment cost of the production line.

Description

technical field [0001] The invention belongs to the technical field of wire rod rolling, and in particular relates to a method for rolling a large special steel bar. Specifically, it uses a semi-continuous rolling method of "7 racks of rough rolling + head-off roller table + 8 racks of intermediate finish rolling". The rolling process carried out in the production line can not only ensure the quality of special steel large bars, but also improve the production efficiency of the large bar production line, and the investment cost of the production line can be greatly reduced. Background technique [0002] At present, the rolling mills of large bar (φ100mm-φ350mm) rolling production lines at home and abroad are usually arranged in the form of "1+N", "1" refers to a reversible blanking machine (roll diameter φ1000mm-φ1300mm), "N" refers to 6 -10 continuous rolling mills. The characteristics of the layout of this rolling line are: the billet can adopt various specifications, and...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems existing in the layout of the existing rolling line for large bar production, the purpose of the present invention is to provide a semi-continuous rolling production line of "7 racks of rough rolling + stripping roller table + 8 racks of intermediate finish rolling", which can both Guarantee the quality of special steel large bars, improve the production efficiency of the large bar production line, and greatly reduce the investment cost of the production line

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