Packaging steel strip cold rolling strip production technology

Packaging steel strip cold rolling strip production process of cold rolling strip production art most general soil processes; Centering on the strip cold rolling mill, by a continuous pickling hot-rolled coil cold-rolled ( Strip cold rolling mill) A electrolytic cleaning, annealing the level off rolling finishing ( Shear line, line) Such as all kinds of homework. 1. Continuous pickling continuous pickling is rolled the hot rolled plate continuously by hydrochloric acid tip or sulfur acid tank to remove iron oxide on the surface of the process. In addition, in order to improve the operation efficiency of the process and the yield, rolled the several hot rolled plate welded together, roll into a large plate. 2. Cold rolling mill is at room temperature, the thickness of the hot rolled plate roll dairy to the finished product equipment of rolling oil, both as a lubricant between roll and strip, and when the roll coolant. Usually is to use more than four roller frame continuous ( Tandem mill) And single stand reversing cold rolling mill. The former is used for high efficiency, large production varieties; The productivity is low, applicable to many varieties, special material. 3. Electrolytic cleaning electrolytic cleaning is to remove residual after cold rolled steel sheet on the surface of the rolling oil process, in the process of strip steel continuously through the electrolytic cell, using electrolytic degreasing 淸 wash. 4. After annealing for cold rolled crystal structure, high hardness, poor processability, so through recrystallization annealing process, improve its crystal structure. Annealing is one of the larger process affect the cold rolled strip steel performance, according to the specifications of the finished product, purpose, determine how annealing ( Tight curl, loose volume) And annealing system ( Annealing temperature. Annealing time, heating rate, etc. ) 。 5. Smooth rolling to slightly cold rolling strip steel after annealing, eliminate the yield platform at the same time improve the straightness of the finished product, control of the surface of the light, the purpose of these is flat. 1 - planishing mill adopted 2 four high rolling mill, usually under pressure rate is about 1%. 6. Finishing in the last line of cold rolling process of shear line or heavy volume on the line, trimming, shear and volume classification, etc. , to obtain the required product size, at the same time, the size, surface, shape of inspection, after inspection, besmear antirust oil, become a finished product. In figure 5 - 2, shows the typical layout of abrasion.