Molybdenum is a transition element with high melting point, high density (10.23g/cm³), good thermal conductivity, low thermal expansion coefficient, high resistivity, etc. Due to its excellent performance, it is widely used in the steel industry, mold industry, automotive spraying and other industries. TZM alloy is a common high-temperature alloy among molybdenum-based alloys. Then what is the difference between TZM alloy vs pure molybdenum? In this article, we will try to answer this question.
ZM alloy vs pure molybdenum
TZM alloy is also called molybdenum-zirconium-titanium alloy or titanium-zirconium-molybdenum alloy. It is a molybdenum alloy containing 0.50% titanium, 0.08% zirconium, and 0.02% carbon. Its common preparation methods are arc casting and powder metallurgy technology.
Pure molybdenum is mainly used in high-temperature environments with strict purity requirements. However, its low recrystallization temperature, poor processing performance, high brittleness and low strength limit its practical application.
The density of TZM alloy is 10.22g/cm³, melting point is 2617°C, and boiling point is 4612°C. The density of pure molybdenum is 10.29g/cm³, melting point is 2610℃, and boiling point is 5560℃.
In addition, compared with pure molybdenum, molybdenum zirconium titanium alloy has higher recrystallization temperature and room temperature, as well as high temperature strength. This is mainly because a small amount of finely dispersed particle additives prevents the growth of molybdenum grains under high temperature conditions, significantly increases the recrystallization temperature of the alloy, and greatly improves the room temperature and high temperature mechanical properties of the alloy.
Compared with pure molybdenum, the initial recrystallization temperature and final recrystallization temperature of TZM alloy are increased by 500℃ and 450℃ respectively.
TZM alloy can be used to manufacture rocket nozzles, radiation shielding, electron tube cathodes, and valve bodies in torpedo engines. Pure molybdenum wire is generally used in high-temperature electric furnaces, EDM machining, and wire cutting; molybdenum sheets are used to manufacture radio equipment and X-ray equipment; molybdenum crucibles are mainly used to manufacture gun bores and rocket nozzles.
Conclusion
Thank you for reading our article, we hope it helps you understand TZM alloy and pure molybdenum better. If you want to know more about molybdenum metal and molybdenum alloys, we recommend you visit Non-Ferrous for more information.