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How to Improve the Quality of Molybdenum Plate in the Rolling Process

Molybdenum plate is made from pure molybdenum material with excellent mechanical and physical properties such as high temperature resistance, good thermal and electrical conductivity, and low thermal expansion coefficient. Nowadays, it is widely used in the construction of furnace tooling and parts and as a feedstock for the fabrication of parts for the electronics and semiconductor industries.

To ensure good quality, the manufacturing process is important, especially the rolling process. Starting from the plate blank, and going through the steps of forging-cogging, hot rolling, warm rolling, cold rolling, annealing, and surface cleaning, etc., until the required size is obtained. Compared with vacuum smelting billets, powder metallurgy sintered billets have advantages of few procedures, good mixing, less impurities and qualitied slab, etc.

In the rolling process, the rolled piece undergoes plastic deformation under the action of the rolling force, resulting in work hardening. In the subsequent hot rolling and warm rolling, usually one heating is accompanied by multiple passes, so that the two opposite processes of hardening and softening of recovery and recrystallization exist at the same time, that is, dynamic recovery and dynamic recrystallization occur. 

The recovery and recrystallization that occur in the annealing, holding process and subsequent cooling after the deformation is interrupted or terminated are static recovery and static recrystallization, which are mainly reflected in the cold rolling stage. For rolled products or as raw materials for subsequent drawing, stamping and other processes, the process parameters in the rolling determine the quality, performance and application of the plate itself.

After rolling with a deformation of more than 60%, the density of the molybdenum plate is basically close to the theoretical density of molybdenum, which enables it to be widely used in many fields. After cleaning, the plate’s surface will become silver-gray metallic luster. The finished product has a flat, smooth surface, no heavy skin.

Chinatungsten Online is one of the leading molybdenum plate/sheet suppliers with more than twenty years’ experience. Please contact us if you have got any purchasing plan. 

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