TZM alloy properties and manufacturing
TZM alloy has the characteristics of high melting point, high strength, high elastic modulus, small linear expansion coefficient, low vapor pressure, good electrical and thermal conductivity, strong corrosion resistance and good high temperature mechanical properties, so it can be widely used in many fields.
Definition: a superalloy commonly used in molybdenum base alloys, consisting of 0.50% titanium, 0.08% zirconium, and the remaining 0.02% carbon molybdenum alloy.
Microelement alloying alloys (such as Mo-0.5Ti, Z-6, etc.) are formed by adding trace elements such as titanium and zirconium to molybdenum, so that the reactants (TiC and ZrC) as dispersion phases are strengthened to improve the properties of the alloys.
TZM alloys (molybdenum zirconium titanium alloy) are commonly prepared by arc melting - casting and powder metallurgy. In the arc melting casting method, a certain amount of alloy elements such as Ti and Zr are added after melting pure molybdenum by arc, and then TZM alloy (molybdenum zirconium titanium alloy) is obtained by conventional casting method.
Powder metallurgy has unique chemical composition and mechanical and physical properties, which cannot be obtained by traditional casting methods. The high purity molybdenum powder, TiH2 powder, ZrH2 powder and graphite powder were mixed in proportion and formed by cold isostatic pressing, and then sintered at high temperature under protective atmosphere to get TZM blank. After 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 get TZM finished material. The rolling (forging) process and subsequent heat treatment of billet have great influence on the properties, anisotropy and texture of the material.
The use of powder metallurgy can save the vacuum consumable electric arc furnace, large extruder and forging hammer and the corresponding high temperature heating furnace and other large equipment, so that the process is simplified, the production cycle is shortened, the energy consumption is reduced, the production capacity and the rate of finished products are doubled, so the cost is greatly reduced.
TZM alloys (molybdenum zirconium titanium alloy) are usually prepared as rods and plates. Powder metallurgy can save vacuum consumable electric arc furnace, large extruder and forging hammer as well as the corresponding high temperature heating furnace and other large equipment, so that the process is simplified, the production cycle is shortened, consumption is reduced, production capacity and product rate can be improved, so the cost is greatly reduced.
