1. Used for thermal processing molds
The aviation and aerospace sectors mainly use molybdenum alloys to make molds and high-temperature forged engine parts. Its application materials are mainly three alloys: active metal carbide strengthened molybdenum, optional element strengthened molybdenum and mechanical dispersion two-phase strengthened molybdenum. Active metal carbide reinforced molybdenum alloy has good high temperature strength and high thermal conductivity, so it is mainly used in the thermal processing mold industry. It is precisely because of molybdenum's high thermal conductivity and low thermal expansion that it is the material of choice for thermal shock resistance.
2. Used for molten metal processing
Aluminum casting plants use molybdenum to overcome the problem of hot cracking in their processed materials. That is, TZM alloy (titanium-zirconium-molybdenum) cores and mandrels (rods) are usually used in parts of the processed materials that are prone to heat cracking, which can also avoid hot cracking in the materials. Phenomenon. The use of TZM and MHC alloys can also improve the rapid solidification capability of processing equipment. Tungsten-molybdenum alloy has the same corrosion resistance and can significantly reduce production costs. Therefore, Mo-25%W and Mo-30%W alloy materials have been developed that are suitable for promotion and application in impellers, pump units and molten zinc pipe systems.
3. Used for thermal spraying treatment
Piston rings can be thermally sprayed with molybdenum. The method is to mix molybdenum powder with a binder containing nickel (Ni) and chromium (Cr), and then spray the mixture on the piston by plasma. The coating can be pure molybdenum or molybdenum alloy mixed powder, which is both wear-resistant and corrosion-resistant, making it suitable for paper industry applications. Molybdenum alloy. Moreover, molybdenum powder can also be mixed with different contents of nickel, chromium, boron and silicon powder to form different powder mixtures. However, spray powder requires good fluidity. Thermal spray powder should generally be spherical or nearly spherical after spray drying. shape. In addition, molybdenum and molybdenum alloy mixed powders can also be used in plasma nozzles to densify pre-alloyed powders of different qualities that are more resistant to wear and corrosion.
4. Used for chemical treatment
Using molybdenum as electrode material in glass melting processing can also improve the processing capacity of traditional furnaces. Molybdenum is suitable as a component material for high-temperature furnaces due to its high-temperature strength and thermal stability. For example, molybdenum and molybdenum alloys are mostly used as hot isostatic pressing (HIP) device materials, heating elements, sleeves and brackets; molybdenum fixtures and sintered molybdenum boats are commonly used in ceramics; molybdenum is almost always used in the electronics industry to produce oxide ceramic products. The carrier is fired.
