One, introduction

Hot rolled coil is used for continuous casting slab or slab as raw material, after reheating furnace heating, scales entered the roughing mill in the high pressure water, roughing cut is expected by the head, tail, and then enter the finishing mill, the implementation of the computer controlled rolling, finally after rolling through the laminar cooling (computer controlled cooling rate) and coiling machine coiling, become straight hair volume. Hair straightener roll head, tail often forms a tongue shape and fishtail, thickness, width of poor accuracy, edge has wavy, folding, tower and other defects. The volume weight heavier, steel coil diameter is 760mm. (general pipe industry like use. )

2 two, characteristics

Because there is no after annealing treatment, the hardness is very high (HRB greater than 90), mechanical processing performance is poor, only a simplebending process has less than 90 degree directional (direction perpendicular to the rolled).

Three, use 3

Hot rolled products with high strength and good toughness, easy processing and good forming can be excellent performance of welding, which is widely used in ships, cars, bridges, buildings, machinery, boiler, pressure vesselmanufacturing industry.

The scope of application:

(1) after annealing processing into the common cold;

(2) processing galvanized galvanized unit before the annealing treatment;

(3) the basic do not need to process the panel.

4 four, classification

Carbon steel plate, carbon plate, low alloy plate, ship plate, bridge plate, boiler plate, container plate etc.. Rolling hard volumes: under normal temperature,the hot pickling volumes of continuous rolling.

Hot rolled steel strip products include steel (roll) and the shear of steel plate.And steel (coils) can be divided into straight and finishes volume (the volume,smooth rolling and slitting roll).