A brief introduction of molybdenum alloy
1. TZM and TZC molybdenum alloy
TZM alloy is Mo based alloy which contains 0.5%Ti, 0.08%Zr and 0.01%～0.04%C. Because the small amount of finely dispersed additive particles stop the grain growth of Mo under high temperature conditions, high-temperature strength and resistance to the recrystallization temperature are significantly improved. TZC alloy is a kind of alloying elements, molybdenum alloy whose content is higher than TZM alloy is an improved type of TZM molybdenum alloys, and it has better strengthening effect of aging heat treatment. But because the cost of TZC alloy is high, and the processing is difficult, therefore it has not replaced the TZM alloy.
2. MHC and ZHM alloy
The performance of ZHM is better than MHC. The performance of the alloy has a great relationship between the heat treatment conditions and machining deformation degree. Such as the MHC series, the spindle which is made by powder metallurgy of Mo-1Hf-0.05Calloy, its tensile strength is higher 20% at 950～1250℃ and the extend rate of all directions is about 1% ~ 10% when the amount of forging deformation reaches 60%.
3. Mo-W alloy
The working temperature of alloy can increase about 200℃when the W is added about 25% ~ 30%. Mo-W alloy can produce just only in the form of parts, and it can't produce plate and wire. The recrystallization temperature of Mo-W alloy is slightly higher than the pure molybdenum. It has excellent corrosion resistance performance to the molten zinc, so it mainly applied in the zinc industry, such as pump components for automatic die casting machinery, casting valve, Hong Straw and nozzle etc..
4. Mo-Re alloy
Although the rhenium is scarce and expensive, because it has some comprehensive performances, such as the unique high heat temperature, good plastic etc. So it not only applied in electronic industry.
In general, Mo-5Re and Mo-41Re are used as the thermocouple wires, as structural material in aerospace, Mo-50Re as high temperature structural materials.
In the strength properties, the doped molybdenum shows great superiority in high temperature conditions. Although blow 1000℃, the strength of TZM and pure molybdenum are higher than the doped molybdenum. This means that the temperature is higher, the effect of bubble strengthening will be greater, and the strength of TZM and pure molybdenum are higher than the doped molybdenum. This means that the temperature is higher, the effect of bubble strengthening will be greater.
Because the doped molybdenum has the above superior performance, some typical applications will be produced, such as the plastic support wire in the automobile and motorcycle headlight, electronic tube and furnace heating element, boats for interring and annealing etc.
TZM alloy is Mo based alloy which contains 0.5%Ti, 0.08%Zr and 0.01%～0.04%C. Because the small amount of finely dispersed additive particles stop the grain growth of Mo under high temperature conditions, high-temperature strength and resistance to the recrystallization temperature are significantly improved. TZC alloy is a kind of alloying elements, molybdenum alloy whose content is higher than TZM alloy is an improved type of TZM molybdenum alloys, and it has better strengthening effect of aging heat treatment. But because the cost of TZC alloy is high, and the processing is difficult, therefore it has not replaced the TZM alloy.
2. MHC and ZHM alloy
The performance of ZHM is better than MHC. The performance of the alloy has a great relationship between the heat treatment conditions and machining deformation degree. Such as the MHC series, the spindle which is made by powder metallurgy of Mo-1Hf-0.05Calloy, its tensile strength is higher 20% at 950～1250℃ and the extend rate of all directions is about 1% ~ 10% when the amount of forging deformation reaches 60%.
3. Mo-W alloy
The working temperature of alloy can increase about 200℃when the W is added about 25% ~ 30%. Mo-W alloy can produce just only in the form of parts, and it can't produce plate and wire. The recrystallization temperature of Mo-W alloy is slightly higher than the pure molybdenum. It has excellent corrosion resistance performance to the molten zinc, so it mainly applied in the zinc industry, such as pump components for automatic die casting machinery, casting valve, Hong Straw and nozzle etc..
4. Mo-Re alloy
Although the rhenium is scarce and expensive, because it has some comprehensive performances, such as the unique high heat temperature, good plastic etc. So it not only applied in electronic industry.
In general, Mo-5Re and Mo-41Re are used as the thermocouple wires, as structural material in aerospace, Mo-50Re as high temperature structural materials.
In the strength properties, the doped molybdenum shows great superiority in high temperature conditions. Although blow 1000℃, the strength of TZM and pure molybdenum are higher than the doped molybdenum. This means that the temperature is higher, the effect of bubble strengthening will be greater, and the strength of TZM and pure molybdenum are higher than the doped molybdenum. This means that the temperature is higher, the effect of bubble strengthening will be greater.
Because the doped molybdenum has the above superior performance, some typical applications will be produced, such as the plastic support wire in the automobile and motorcycle headlight, electronic tube and furnace heating element, boats for interring and annealing etc.
