(1) During the rolling process of tantalum foil from 0.2 mm to 0.05 mm, the tensile strength and yield strength of the tantalum foil increase gradually with the increase of the reduction rate, but the yield strength at the reduction rate of 0 ~ 45% The change rate is faster when the reduction rate is reduced after the reduction ratio is> 45%; during the rolling of the tantalum foil from 0.05mm to 0.01mm, the yield strength increases with the reduction ratio when the reduction ratio is from 0 to 45%. While gradually increasing, the rate of change showed a decreasing trend. After the reduction rate was> 45%, its tensile strength gradually decreased with the increase of the reduction rate.

(2) During the rolling of tantalum foil from 0.2 mm to 0.01 mm, the tension of the two rolling passes with the thickness of the foil decreases, and the change trends are the same, both of which increase first and then decrease. When the reduction ratio is less than 30%, the tension gradually increases as the thickness of the tantalum foil decreases, and when the reduction ratio is greater than 30%, the tension gradually decreases as the thickness of the tantalum foil decreases. After more than 60%, the change of tension tends to gradually flatten, which is similar to the quadratic curve.

(3) Through the test, the following rolling tension model of tantalum foil is obtained: During the first rolling pass from 0.2mm to 0.05mm in thickness, the tensile stress coefficient is best to be 0.3 ~ 0.4, and the tension model can be expressed as y = -169514.9 x2 + 45711.3x-1101.4 (x is the thickness of the exit); during the second rolling process from the thickness of 0.05 mm to the thickness of 0.01 mm, the tension is not a single tensile stress coefficient. It can be determined through a large number of experimental studies and repeated verifications. The rolling tension model of tantalum foil below 0.05mm can be expressed as y = -768066.7x2 + 53460x-238.3 (x is the exit thickness).