Study on Cold Deep Drawing Performance and Microstructures of Cross-Rolled Molybdenum Strip

Through cross-rolling, cold deep drawing and analysis of mechanical properties and microstructure, the microstructure evolution and cold deep drawing performance of molybdenum strip for liquid crystal display (LCD) backlight were investigated. The results show that 0.2 mm thick molybdenum strip of high quality and high deep drawing performance was fabricated by low temperature cross-rolling twice and cold cross-rolling once. The molybdenum strip has weak anisotropy and good mechanical properties. The small molybdenum cup with 2.0 mm outside diameter and 10 mm height was prepared by multi-pass continuous cold deep drawing. The microstructure of entire cross-section of molybdenum cup is fibrous elongated grains which are staggered overlapped each other. The thickness reduction ratio is the largest at bottom corner of the cup, namely the "danger zone". The prepared molybdenum strip is suitable for LCD backlight light.