Preparation method of TZM alloy

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The common preparation methods of TZM alloy (molybdenum zirconium titanium alloy) are: arc melting-casting method and powder metallurgy technology.

The arc melting-casting method is to melt pure molybdenum with an arc, add a certain amount of Ti, Zr and other alloy elements according to the weight percentage, and then use the conventional casting method to obtain TZM alloy (molybdenum zirconium titanium alloy);

Powder metallurgy has a 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 mix evenly in proportion and then form by cold isostatic pressing, and then sinter at high temperature under a protective atmosphere to obtain TZM billet. The billet is then subjected to high-temperature hot rolling (high-temperature forging), high-temperature annealing, medium-temperature hot rolling (medium-temperature forging), medium-temperature annealing to eliminate stress, and then warm rolling (warm forging) to obtain TZM finished material. The rolling (forging) process of the billet and the subsequent heat treatment have a great influence on the performance, anisotropy and texture of the material.

The use of powder metallurgy can save large equipment such as vacuum consumable arc furnaces, large extruders and forging hammers, and corresponding high-temperature heating furnaces, simplifying the process, shortening the production cycle, reducing energy consumption, and doubling the production capacity and yield rate, thus greatly reducing costs.

TZM alloy (molybdenum zirconium titanium alloy) is usually prepared into bars and plates. The powder metallurgy method can save large equipment such as vacuum consumable arc furnaces, large extruders and forging hammers, and corresponding high-temperature heating furnaces, simplifying the process, shortening the production cycle, reducing consumption, and increasing production capacity and yield rate, thus greatly reducing costs.