Views:3 Author:Site Editor Publish Time: 2020-06-01 Origin:Site
Molybdenum alloy is a non-ferrous alloy composed of molybdenum as a matrix and adding other elements. Its alloys are mainly divided into TZM and TZC molybdenum alloys, MHC and ZHM alloys, Mo-W alloys, Mo-Re alloys, MH and KW molybdenum alloys.
1. TZM and TZC molybdenum alloys
The TZM alloy (Figure 1) is a high-temperature alloy commonly used in molybdenum-based alloys. Its composition is a molybdenum alloy with 0.50% titanium, 0.08% zirconium, and the remaining 0.02% carbon. TZM alloy has the characteristics of high melting point, high strength, high elastic modulus, small linear expansion coefficient, low vapor pressure, good electrical and thermal conductivity, strong corrosion resistance and good mechanical properties at high temperature, etc., so it is widely used in many fields. The TZC alloy is an alloy derived from TZM and has a large change in composition. It has a high alloy content, high performance, and reacts to age hardening heat treatment.
2. MHC and ZHM alloys
MHC alloy, that is, molybdenum and hafnium carbon alloy, is to strengthen the molybdenum alloy by forming a two-phase structure by adding Hf instead of Ti. The performance of MHC alloy has a great relationship with the degree of processing deformation and heat treatment conditions. For example, in the MHC series, the Mo-1Hf-0.05C alloy, the ingot made of powder metallurgy, when the forging deformation amount reaches 60%, the tensile strength at 950 ～ 1250 ℃ is 20% higher than that of TZM The elongation in the direction is 1% to 10%, and ZHM alloy has better performance than MHC.
3. Mo-W alloy
The Mo-W alloy is a molybdenum-based alloy containing 25% and 30% of tungsten. It has excellent properties to prevent corrosion of molten zinc. It can be used to make molten zinc pumps and electrolytic zinc electrodes and filter molten zinc.
Four, Mo-Re alloy
Mo-Re alloy is a powder metallurgy product made of Mo and Re exceeding 40wt%, which is widely used in high temperature occasions. Their high temperature strength and resistance to thermal shock make them the best raw materials for radiators, heating elements, thermocouple protection sleeves, heat reflecting screens, vacuum furnace elements, electronic tube originals and other products.
Five, MH and KW molybdenum alloy
The MH alloy is a K + S element added to the molybdenum matrix, while the KW alloy is a molybdenum alloy added K + Si + A element to the molybdenum matrix.