Newly Invented Method To Produce Ultra-thin Molybdenum Foil

Molybdenum sheet produced by general series of processes has a comparatively low production yield. The production yield can only be 50% to 60%. An even worse problem is that the production yield will drop dramatically as a stricter thickness requirement is needed. Also, the flatness is hard to maintain stable.

Therefore, considering the materials consumption, it is difficult to achieve a perspective production yield and cost efficiency if the thickness has to be kept lower than 0.3mm and the bias of flatness is lower than 10 μm. For example of Mo foil used for CT machine, the thickness is required to be 30x60x0.24mm and flatness bias is required to be lower than 10 μm, as measured by a laser flatness measuring instrument. The common processing method can’t meet the requirements without sacrificing productivity and cost efficiency.

One newly invented method to produce ultra-thin Mo foil has overcome the shortages mentioned above. The core technical innovation of the new method involves the laminating and annealing processes. At first, the Mo sheet is cold rolled to reduce the thickness to a certain degree. While going through the other common processes, the Mo sheet will be going through additional processes of warm rolling, and repetitive annealing and laminating compression. The newly processed Mo foil can guarantee a thickness lower than 0.3mm with a high production yield and low materials consumption.

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