Effects of secondary rolling temperature and deformation rate on microstructure and mechanical properties of the 7050 aluminum alloy cast rolling sheets were investigated.Microstructure observation reveals that with the rolling deformation rate of 15%

most of grains in the alloy samples with 4mm in thickness remain cast rolling state

and with the deformation rate of 60%

the grain size in the sample is refined

and as-casting rolling state structure is dissolved greatly with elongated along rolling direction.With the deformation rate of 75%

the cast-rolling structure completely disappears

and grain is broken fully with clear elongated flow-line.When the rolling temperature is increased to 450℃

the rheological properties of the materials exhibit desirable

and the recrystallization is more easily generated

so the mechanical properties of the prepared sheets have the most satisfied results

where tensile strength and elongation reach 310.2 MPa and 3.77%

respectively.