Pure Molybdenum is widely used for example for high-temperature heating elements, shielding, filaments, evaporation crucibles, rocket propulsions, radiation shields, X-ray anodes, welding electrodes, thermoses, coatings for wear protection, components and melting electrodes for glass fabrication, sputtering targets and others.
The molybdenum alloy TZM is a commonly used constructional material for high-temperature applications. It is well known that pure molybdenum and its molybdenum alloys develop a distinct subgrain structure and texture during hot deformation. These microstructural aspects have a significant effect on strength at elevated temperatures.
TZM alloy is commonly used as structural material in thermally loaded applications or as plate material in rotary X-ray tubes.
Compared to pure molybdenum, TZM exhibits a higher strength and creep resistance. Especially at elevated temperatures the primary strengthening mechanism was attributed to carbide particles.
Several types and grades of molybdenum alloys are available commercially. TZM wrought bar was selected as the most suitable material on the basis of its superior high-temperature tensile strength and a high recrystallization temperature (between 1400 and 1600 C). A high recrystallization temperature is particularly important as this eliminates the possibility of recrystallization during brazing welding causing a loss in ductility and strength.
By means of solid-solution and carbide-strengthening TZM features improved high-temperature strength up to 1400 °C and a higher recrystallization temperature, compared to pure Molybdenum.
Typical Applications of TZM: Components for heat treatment equipment, supports, fixtures, carriers, hot runner nozzles, casting molds, forging dies and others.