Packaging steel strip manufacturer: cold rolled steel strip production technology

Packaging steel strip manufacturer: cold-rolled strip steel production process of cold rolling strip production the most general technological process; 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 cleaning. 4. The crystal structure of after annealing for cold rolling. High hardness, good working poor, so want to 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 and 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 surface finish. The purpose of these is flat. 1 - planishing mill adopted 2 four high rolling mill, usually under pressure rate is about 1%.