Common preparation methods of TZM alloy
TZM alloy is also known as molybdenum-zirconium-titanium alloy and titanium-zirconium-molybdenum alloy. It is currently the best molybdenum alloy high-temperature material. With its own significant advantages, this alloy has applications in many industries. So, what are the common preparation methods for this alloy? Let’s find out together below.
Industry insiders said that the commonly used preparation methods of TZM alloys mainly include arc melting-casting and powder metallurgy technology. The arc melting-casting method uses an electric arc to melt pure molybdenum and then adds a certain amount of Ti, Zr and other alloying elements according to weight percentage, and then uses conventional casting methods to obtain TZM alloy.
Powder metallurgy has unique chemical composition and mechanical and physical properties, which cannot be obtained by traditional melting and casting methods. It uses high-purity molybdenum powder and TIH2 powder, ZRH2 powder and graphite powder to be evenly mixed in proportion and then cold isostatic. Press forming, and then sintering at high temperature under a protective atmosphere to obtain a TZM alloy billet. The billet is then subjected to high-temperature hot rolling, high-temperature annealing, medium-temperature hot rolling, medium-temperature annealing to eliminate stress, and then warm-rolled to obtain the TZM finished product. The rolling process of the billet and Subsequent heat treatment has a greater impact on the material's properties, various shapes and textures.
TZM alloys are usually prepared into bars and plates. The powder metallurgy method can save large equipment such as vacuum consumable electric arc furnaces, large extruders and forging hammers, and corresponding high-temperature heating furnaces, simplifying the process, shortening the production cycle, and reducing consumption. Production capacity and yield are improved, so costs are greatly reduced.
