Study on molybdenum foil strip of edge
Molybdenum has an expansion coefficient similar to that of quartz glass, so it is widely used as sealing material in the field of electric light source. It is necessary to have a molybdenum foil transition between the leading rod of halogen tungsten lamp and mercury lamp and filament and electrode, which and play a dual role of vacuum sealing and conduction after being pressed and sealed with the end of quartz glass tube.
Applied in the sealing of molybdenum foil belt, in order to ensure that the quartz glass pressure seal does not crack, the thickness of molybdenum foil should be controlled in 0.0165 ~0.045 mm, width should be controlled in 2.0~4.5 mm, the edge of molybdenum foil to be processed into a cutting edge shape, The cutting edge of this book can ensure that the plastic deformation is produced when the quartz glass is pressed and sealed, and the stress is reduced to the minimum degree, so as to achieve the ideal vacuum seal without leakage and chronic leakage phenomenon. With the technological transformation of the lamp industry, the automatic sealing and pressing lamp assembly line is introduced, and the rolling molybdenum foil strip is needed to meet the continuous automatic requirements.
The material of the molybdenum box belt used for sealing requires uniform metallographic structure, high strength, recrystallization temperature and good weldability. The molybdenum material with trace strengthening elements is obtained by powder metallurgy method, which is processed into annealed coarse molybdenum wire of 00.8~ 2.4mm by pressing, vertical melting, spinning drawing and annealing. The newly studied molybdenum foil strip manufacturing method is to use a special four-high rolling mill hot rolled rough molybdenum wire billet, then rolled to 0.18~ 0.13mm, after cleaning, annealing, 12-high 20-high finishing mill, rolled to 0.05~ 0.025mm range, and then through continuous polarization electrolytic polishing process to make high-precision foil strip.
