Hot roll T shaped steel production technique for ship

Abstract

The invention discloses a process for producing a marine hot-rolled T-shaped steel. The raw material of the process is special steel for marine steel, and billet blanking is calculated according to the specification of a finished product, multiple lengths and the internal width of a heating furnace. The billet is heated at the temperature of 1140-1200 DEG C, firstly roughly rolled and secondarily rolled by a conventional mill train, and then finely rolled by a universal mill train to obtain a finished product rolled piece, the rolled piece is further cooled, straightened and cold sawn to length to obtain a finished product. The invention has the advantages of one-time forming by hot rolling, high precision of the finished product, and reduces metal consumption and production cost.

Description

technical field [0001] The invention relates to a production process of hot-rolled T-shaped steel, in particular to a production process of hot-rolled T-shaped steel for ships. Background technique [0002] The traditional production process of T-shaped steel for shipbuilding is welding combined forming. The plate is cut and blanked, corrected and combined to weld, straightened and formed, and the welding process is troublesome. The welding process of this process mainly increases the joint strength of the weld by increasing the fillet height of the fillet weld with filler metal. Due to the insufficient penetration of the weld, the single-pass weld cannot completely fill all the gaps between the joints. Only by increasing the slope Therefore, the T-shaped steel welded by this method has a large amount of deformation, a large amount of metal consumption, and a high production cost. Contents of the invention [0003] The object of the present invention is to overcome the a...

AI Technical Summary

Problems solved by technology

The welding process of this process mainly increases the joint strength of the weld by increasing the fillet height of the fillet weld with filler metal. Due to the insufficient penetration of the weld, the single-pass weld cannot completely fill all the gaps between the joints. Only by increasing the slope Therefore, the T-shaped steel welded by this method has a large amount of deformation, a large amount of metal consumption, and high production costs.