Different thickness of the strip: how to correctly determine

Waveness – transverse waves of various sizes in the middle or along the edges of the strip from one or two sides. Waveness on medium stripes occurs as a result of a large bulge of the middle part of the barrel of the roll, as well as when compressing that does not correspond to the bulge of the rolls. It is possible to eliminate this metal defect with adjustment of the strip, cooling the middle of the barrel of the roll or heated edge of the barrel. In production, you may need to order crushed stone which you can: buy gravel. One -sided wave indicates an uneven distribution of compression along the width of the strip. This defect is eliminated by lifting the pressure from the wave. The cause of the two -sided wave on the strip is a large production of the barrel of the roll with a significant squeezing. This defect is eliminated either by a transshipment of rolls, or heated the middle of the barrel of the roll and a decrease in the squeezing of the strip. The bonding of the strip occurs as a result of the larger extract of its middle part during the rolling process due to the large initial bulge of the rolls and overheating the middle of the barrel of the rolls. With a significant exhaust of the edges of the strip, their wavyness is observed. Rounded metal crumbs on the surface of the metal is a consequence of the separation of pieces of metal from the torn edge, sticking them to the oiled surface of the strip and subsequent rolling into the metal. The separation of pieces of metal can also occur during the friction of one turn of the strip about the other in a poorly torn roll or with a significant flora of rolling on the wiring. Ways to prevent a defect, removal of metal crumbs from the surface of the strip with air, emulsion or other method, as well as the correct and dense view of the rolls. Captivity – thin, scaly, oxidized plates of metal, peeling away from the surface of the leaf or tape. They can arise as a result of the autopsy during the rolling of small bubbles closely located to the surface of the metal, the conquer, the ingot and non -metallic inclusions, as well as with hot rolling of the metal on highly produced rolls and on the rolls with a deep notch, as a result of which local ones are formed on the surface of the rolling metal. Bugorks, which, during subsequent rolling, roll out and give small influxes in the form of captivity.