Rolling method of extremely thin niobium strip. The technical scheme is that the rolling method includes rolling equipment and rolling process two parts: rolling equipment using 16-high rolling mill, 16-high rolling mill roll type is: 16-high rolling mill on the middle roller cone length of 40mm, roller diameter difference is 0.1mm; The cone length of the lower middle roll of the 16-h mill is 40mm and the diameter difference is 0.15mm. The work roll of the 16-high mill is flat roll, the diameter of the work roll is 22mm, and the work length is 200mm. The rolling process is three passes rolling at room temperature. The niobium strip to be rolled is industrial grade with niobium content ≥99wt%. The width of niobium strip to be rolled is 145~155mm, and the thickness is 0.08~0.12mm. The thickness of niobium strip after the third pass of rolling is 0.017~0.019mm. The invention not only has the characteristics of saving energy, simple process and improving efficiency, but also can reduce the labor intensity of subsequent processing.
Niobium is widely used as electrode material because of its good plasticity, high conductivity and overflow power. Niobium strip has two main applications at present: one is as one of the main materials in the electrode heads of cold cathode fluorescent lamps (CCFL). Mainly use its high sputtering resistance, long service life and can form with cheap raw materials have good processability, and manufacture cold cathode discharge tube electrode, has been widely used; Two is used to make the key components of high-pressure sodium lamp, such as niobium belt connector as a conductive path. Mainly because of its excellent resistance to metal sodium corrosion and good high temperature performance.
In 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 ~ 105KN, the operating side force is 105 ~ 115KN, and the left tension is 1.100^ 1.115kN. The right tension is 0.865 ~ 0.875kN, and the rolling force is 205 ~ 220KN; The thickness of niobium strip after the first roll is 0.043^0.050mm.
The rolling method adopted in this concrete implementation method includes rolling equipment and rolling process two parts, the rolling equipment is 16 high rolling mill, the rolling process is three times rolling, the original thickness of 0.08,.12mm niobium strip rolling into the thickness of 0.017^0.019mm extremely thin niobium strip, simple process and high efficiency. At the same time, in the rolling process, heating is not needed, only in room temperature environment can be completed, so it saves energy. After rolling, it is suitable for subsequent cutting, winding and other processing processes. It can be processed into various shapes to meet the needs of the final product and reduce the labor intensity of subsequent processing.
