The production process of electrolytic tinplate steel sheet includes: pickling--cold rolling--annealing--flattening---trimming--tinning---oiling
1,Pickling of electrolytic tinplate steel sheet: 1) For the oxide on the surface of the original plate 2) For trimming, check whether the original plate is defective
2, Tinplate Steel Sheets cold rolling: mainly through pressure to make the thickness thinner. This can be done at room temperature.
3,Tinplate steel sheets annealing: This process is mainly to adjust the corresponding hardness according to the customer's use and requirements. There are two ways: 1) bell furnace annealing 2) continuous annealing. The greater the normal hardness, the more continuous annealing is used
4,Flattening of electrolytic tinplate steel sheet: mainly two aspects: 1) Inspection of surface condition 2) Flattening of plate shape
5,Electrolytic tinplate steel sheet trimming: the smallest tin plate steel cutting is 5mm, and the normal cut is 7.5mm
6.Tinplate steel sheets tinning: the concentration, humidity and other tinning environment should be considered
7,Tinplate steel sheets oiling: Apply DOS oil under normal conditions. In order to prevent sticking, or rust. But the control of the above oil point is more difficult.
Electrolytic tinplate steel sheet composition: from bottom to top, the bottom is the substrate--iron-tin alloy--tin--chromium oxide---oil film