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Using Physical Method to Control Titanium Zirconium Molybdenum Alloy’s Oxygen Content

Titanium zirconium molybdenum (TZM) alloy has high oxygen content will weaken its dispersion strengthening effect, resulting in tensile strength and elongation of product declined sharply, making the alloy can not be used in high temperature and high vacuum environments. The oxygen of TZM alloys mainly form by Ti / Zr oxides or other composite oxide.
Controlling the oxygen content of the TZM alloy by the physical method, there are two aspects as follow. First, choose hypoxia molybdenum powder, then using vacuum mixing put mixed molybdenum powder into the special drums, vacuum preservation or pass through hydrogen as a protective gas. But in the process of loading and isostatic pressing there are absence of any protection, so molybdenum powder will direct contact with the air, resulting in a significant increase in oxygen content of alloy during press process than in the vacuum oxygen content. Simultaneously vacuum mixing technology is too difficulty to practice in the real production. On the other hand, controlling the addition of carbide in alloy is another way control to oxygen content. Although this method can effectively reduce the oxygen content of the alloy TZM, but will lead to excessive carbon content.

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