Preparation of TZM Alloys
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- Category: Molybdenum knowledge
- Published on 19 June 2015
- Written by xinyi
- Hits: 265
Preparation of TZM alloy commonly includes arc melting - casting and powder metallurgy. Arc melting - casting is to add a certain amount of Ti, Zr and other alloying elements by weight percentage into melted pure molybdenum by arc, then the TZM alloy can be got by conventional casting methods.
Powder metallurgy is to get TZM blanks by sintered at high temperature under a protective atmosphere after mixing high purity molybdenum powder and THi2 powder, ZrH2 powder and graphite powder in proportion to the cold isostatic pressing shaping. Blanks then after high temperature hot rolling (hot forging), high-temperature annealing, the temperature in the hot rolling (forging temperature), the temperature annealing to eliminate stress, then warm rolling (warm forging) get into TZM finished materials. Blanks rolling (forging) process and subsequent heat treatment have a greater impact on properties, anisotropy and texture of the material.
TZM alloy are usually made into rods and plates. Powder metallurgy can save vacuum arc remelting furnace, large extruders and forging hammers and the corresponding high-temperature furnace and other large equipments, simplifying the process, shortening the production cycle, lower consumption, and the production capacity and yield can be improved, so the cost reduced greatly.
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