Molybdenum crucibles are suitable for precision casting under certain conditions, especially in processes that require high-temperature melting of active metals, refractory metals or special alloys. Although molybdenum crucibles are not the most common crucible material in precision casting (graphite, alumina, zircon, etc. are more common), they have obvious advantages in some high-end precision casting occasions that require extremely high purity, high-temperature stability and pollution resistance.
- Advantages of Molybdenum Crucible in Precision Casting
- Excellent high temperature performance
molybdenum is as high as 3410°C. It can withstand extremely high temperature metal smelting and is suitable for smelting high melting point metals such as titanium alloy, tungsten alloy, hafnium, zirconium, etc., which ordinary crucibles are not capable of.
- High purity, low pollution
Molybdenum crucibles are generally made of high-purity molybdenum with a purity of more than 99.95%, which releases almost no impurities into the melt. They are very suitable for manufacturing high-end applications such as ultra-high purity metal parts, medical implant materials, and aircraft engine components.
- Excellent chemical stability
In vacuum or inert atmosphere, molybdenum does not react with most metals and is suitable for the smelting and casting of active metals (such as Ti, Zr, and Nb).
- Applicable precision casting types
| Precision Casting Type | Molybdenum crucible applicability description |
| Vacuum Investment Casting | Suitable for high-purity, high-melting-point metal casting, such as aircraft engine blades and titanium alloy implants |
| Centrifugal casting (vacuum environment) | The melt is formed in a molybdenum crucible and then injected into the mold to maintain composition uniformity |
| Arc Casting | Molybdenum crucible can be used as a carrier to receive electron beam or arc heating |
| Investment Casting in Atmospheric Environment | Not recommended, because molybdenum is easily oxidized at high temperatures |
- Typical application scenarios
Aerospace: Vacuum casting of titanium alloy and hafnium alloy turbine blades
Medical implants: melting of high-purity components such as titanium and tantalum alloy ball heads and screws
High temperature ceramic/metal composite casting: Stable molds in high temperature (>2000°C) processes
Nuclear industry material casting: uranium- molybdenum alloy, zirconium-based alloy melting container
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