The rolling process of ASME SA572 Gr.50 steel

The rolling process of ASME SA572 Gr.50 hot rolled medium steel plate, SA572 Gr.50 thick steel plate and thin plate are generally the same. ASME SA572 Gr.50 steel plates rolling generally covers those steps: raw material preparation - heating - rolling - hot correction - cooling – Ultrosonic test – finishing.

ASME SA572 Gr.50 steel slabs are taken to slab warehouse from the continuous casting or initial rolling mill. The SA572 Gr.50 steel slabs are removed by the crane and stored in the warehouse. The SA572 Grade 50 steel slabs are hanged by crane to the track one by one, and then transported to the furnace for heating. There are continuous heating furnace and flat-type furnace. The well heated SA572 Grade 50 steel slabs are delivered to the vertical scale machine by output rail, and the first oxide scale is removed. Then ASME SA572 Gr.50 steel slabs enter the first, second two-rolls roughing mill, rolling back and forth three or five times, and then into the thirdth and fourth four-roll roughing mill for continuous rolling.

During rolling process, we use high-pressure water rinse oxide. General ASME SA572 Gr.50 steel slabs thickness are rolled to 20 ~ 40mm. Follow the fourth roughing mill, SA572 Gr.50 steel plates needs thickness, width and temperature measurement. Thereafter, SA572 Gr.50 structure steel slabs are taken to the finishing train by the roller table, the head or tail is cut by the shearing. Then SA572 Gr.50 steel gets continuous rolling by a four-roll finishing mill. After continuous rolling, SA572 Gr.50 steel strip is laminar cooled and rolled into hot rolled SA572 Gr.50 steel coil. The rolling process is completed.

The entire ASME SA572 Gr.50 steel rolling process has been fully automated. That is, starting from the feeding roller - heating furnace - rolling mill - finishing mill laminar cooling - coiler reeling - until the coil transport chain bifurcation point, the entire SA572 Gr.50 steel production process is automatically controlled by a process Control Computer (SCC) and three digital direct control computer (DDC).