Technique for producing deep-drawing cold-rolled plate based on CSP technique

The present invention discloses a CSP process-based manufacturing technique of a cup drawing stage cold-rolled steel sheet. The manufacturing technique comprises the working procedures of steel-making, continuous casting, heat soaking, hot continuous rolling, cooling, curling, pickling and cold rolling, annealing and flattening. The pickling and cold rolling working procedure is realized by that after decoiling, a hot rolled coil enters into a pickling tank with the pickling speed of 160-170 m/min, and then enters into a four-frame cold continuous rolling mill train. The present invention has the relative percent of reduction that STD1 is 30-37 percent, STD2 is 35-40 percent, STD3 is 30-35 percent and STD4 is 0.1-0.5 percent, and the curling is performed after the cold rolling. The annealing and the flattening working procedures are realized by that the cold rolled hard coil enters into a cover-type annealing furnace, the annealing temperature is 675-685 DEG C, the temperature holding time is 10-15 h, and the flattening elongation rate is 1.0-1.5 percent. Compared with the prior art, the performance of the cup drawing cold-rolled steel sheet produced with the present invention can achieve the European standard EN10130: 1999, at the same time, the production cost can be reduced, the energy is saved, and the consumption is reduced.