Abstract: Effects of ferrite hot rolling process and austenite hot rolling process on hot rolled microstructure, cold rolled microstructure and properties of steel plate cold-rolled common(SPCC) were studied by optical microscope and scanning electron microscope. The results show that compared with austenite rolling process, the average grain size of the hot rolled band produced by ferrite hot rolling process increases about 17 μm, the amount of {111} texture decreases by 8.74%, and the intensity of {111} texture decreases slightly, while the amount and intensity of {001}<110> texture increases by 12.40% and 19.81, respectively. In the SPCC product produced by ferrite hot rolling process, the grains are approximately equiaxed, and compared with that produced by austenile hot raling process, it is also found that the average grain size is about 4.5 μm larger, the average yield strength is 19 MPa lower, and the average r value(plastic strain ratio) is 1.1 smaller. The lower yield strength and r value are due to the larger grain size, less {111} texture and stronger {001}<110> texture in the hot rolled band produced by ferrite hot rolling process.

Key words: ferrite rolling, steel plate cold-rolled common(SPCC), microstructure, texture, mechanical properties