Cold-rolled IF steel free of transverse stripe defect after forming and production method of cold-rolled IF steel

The invention discloses cold-rolled IF steel free of transverse stripe defects after forming and a production method of the cold-rolled IF steel, and belongs to the technical field of cold-rolled steel for automobiles. The IF steel comprises the following main chemical components in percentage by mass: 0.0002 to 0.002 weight percent of C, less than or equal to 0.030 weight percent of Si, 0.09 to 0.13 weight percent of Mn, 0.015 to 0.050 weight percent of Als, less than or equal to 0.015 weight percent of P, less than or equal to 0.015 weight percent of S, less than or equal to 0.004 weight percent of N, 0.04 to 0.060 weight percent of Ti and the balance of Fe. Wherein the content of the excess Ti is 0.015 to 0.035 weight percent. By the adoption of the chemical components, the production and manufacturing technological process comprises the steps of smelting, continuous casting and hot rolling, coiling, pickling and cold rolling, continuous annealing, flattening and finished product obtaining, a proper coilin