Almost all of our tantalum plates use cold working methods. And the plates are annealed. Since there is no phase transition, the speed of heating and cooling is not important. Usually we use quadruplex rolling machine at this stage. And because tantalum is a kind of soft metal, we should pay attention to avoid scratch during all process and delivery.

In commercial production, the plate is usually rolled into a 0.63-1.2 cm thick plate by a two-roll mill or a 4-roll mill, and the width is generally 51 to 102 cm. Representative rolling is carried out at or near room temperature to prevent oxide formation on the surface. When hot rolling is required, the temperature rises to 1000 ° C due to recrystallization, and a severe oxidation reaction occurs.

The typical rolling is under room temperature or similar to room temperature to avoid developing oxide at surface.

When heat rolling is needed, the temperature raises to 1000˚C and intense oxidation happens due to recrystallization.

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