A straightening
Strip in the pickling before the commonly used five-roll straightening machine Straightening. The role of the straightening machine strip bending to be straightening generated by the demolition of the volume and metal crusher; can to a certain extent with strip wavy strip small waves caused by the pull roll roll gap on both sides of the uneven shape can be reduced; so as to eliminate the scratch the surface of strip-shaped Ministry Fortunately, the unit operation is generated to ensure that the strip head and tail shearing section straight, conducive to welding and finishing, to ensure the quality of the cutting, trimming and coiling.
2 descaling
In addition to the main scales of the method can be summarized broken scales method for mechanical, chemical descaling method and machinery - chemical method. Mechanical descaling method, the grinding wheel grinding, bending breaking scales and shot peening breaking scales in three forms. Efficiency of mechanical descaling, shot peening breaking scales with the highest grinding wheel minimum. Bending breaking scales commonly used, the bend-breaking scales by repeated bending strip of descaling effect, this method can play a broken iron scales help to improve the effect of pickling descaling, but not completely eliminate the iron scale, so must be pickling descaling combined role.
3 pickling
3 pickling role
Pickling is completely remove the surface oxide raw materials. The strip surface oxide scale is usually three layers: the outer layer of ferric oxide, middle iron oxide, the inner layer of iron oxide. Strip surface oxide scale due to the nature of the porous and cracking, coupled with mechanical disruption caused by cracks, therefore, strip the acid solution, and its surface three-iron skin all over with the acid to react.
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