交叉轧制钼带冷深冲性能及微观组织研究

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

通过交叉轧制、冷深冲成形以及力学性能和微观组织分析,研究液晶显示器背光源用钼带冷深冲性能和微观组织演变。结果表明:采用两次低温交叉轧制和一次交叉冷轧工艺制备了高质量高冷深冲性能的0.2mm厚钼带,其具有较弱的各向异性和良好的力学性能;利用多道次连续冷深冲方法成功地制备了细小钼杯:Φ外2.0mm,H高10mm,钼杯整个断面微观组织呈纤维状细长晶粒且相互搭接交错,底部圆角处减薄量最大,即"危险区"。所研制的钼带适合于制备液晶显示器背光源发光体材料。

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.