The rolling equipment adopts the 16-roll mill, the roll shape of the 16-roll mill is: the cone length of the upper middle roll of the 16-roll mill is 40mm, and the roll diameter difference is 0.1mm; The cone length of the lower middle roll of the 16-high rolling mill is 40mm, and the difference of roll diameters is 0.15mm. The work roll of the 16-high mill is a flat roll, the diameter of the work roll is 22mm, and the working length is 200mm.
The rolling process adopts three passes:
1) The first rolling
The niobium strip to be rolled is put into the 16-high mill and the first rolling is carried out at room temperature. The mechanical parameters of the first rolling are as follows: The driving side force is 95~130KN, the operating side force is 105~135KN, the left tension is 1.100~1.150KN, the right tension is 0.865~0.900KN, and the rolling force is 205~255KN; The thickness of niobium foil after the first rolling is 0.03~0.05mm.
2) Second pass rolling
The niobium strip after the first roll is put into the 16-high mill and the second roll is carried out at room temperature. The mechanical parameters of the second roll are as follows: The driving side force is 90~105KN, the operating side force is 130~145KN, the left tension is 0.560~0.675KN, the right tension is 0.865~0.900KN, the rolling force is 230~255KN; The thickness of niobium strip after the second rolling is 0.024~0.026mm.
3) Third pass rolling
The niobium strip after the second pass is put into the 16-high mill and the third pass is rolled at room temperature. The mechanical parameters of the third pass are as follows: The driving side force is 105~110KN, the operating side force is 115~130KN, the left tension is 0.670~0.690KN, the right tension is 0.575~0.580KN, the rolling force is 225~240KN; The thickness of niobium strip after the third rolling is 0.017~0.019mm.
The niobium strip to be rolled is of industrial grade, with niobium content ≥99 wt%; The niobium strip to be rolled has a width of 145~155mm and a thickness of 0.08~0.12mm.
