- Time of issue:2020-10-22 10:19:04
Among metals,tungsten has the highest melting point(3420℃)and the lowest vapor pressure.Even if the highest temperature of high vacuum technology is reached,tungsten can still meet its performance requirements.Low thermal expansion,high melting point and perfect shape stability make tungsten an excellent material for glass packaging technology.The resistance of tungsten is an important factor for its use as heating material and furnace material.Tungsten also has high density and good adsorption capacity,so tungsten is also commonly used in the power radiation industry.
At room temperature,tungsten is very brittle and therefore difficult to process.However,at slightly higher temperatures(200-500°C),tungsten's toughness is greatly improved.The high temperature strength and stress of tungsten depend on the processing rate,and the annealing treatment at a certain temperature also has a significant influence on the high temperature strength and stress of tungsten.
Mechanical properties of tungsten:The mechanical properties of tungsten are affected by the purity of the material,the type and number of alloying elements,the heat treatment(annealing conditions),and the crystalline phase structure.Tungsten is a body centered cubic lattice structure with very low ductility at room temperature.The brittle transition temperature of tungsten can be reduced by machining or adding alloys.The strength of tungsten increases with the increase of the machining rate.Unlike most metals,processing also increases the ductility of tungsten,and the addition of rhenium alloys can also increase the ductility of tungsten at room temperature.The mechanical properties of tungsten,especially the creep strength,can be improved by adding a small amount of La oxide.
Chemical properties of tungsten:Tungsten and tungsten alloys have similar corrosion resistance.In the case of molten glass,nitrogen,inert gases,molten metals,and ceramic oxides,even at very high temperatures,as long as no other oxidants are present,these substances only cause slight erosion of tungsten.
Tungsten and its alloys are widely used in lighting,electronics,medical applications and thin-film technology,fused electrodes and high-temperature furnaces.For 15 years,GME has been engaged in the research and development of tungsten and its alloy materials,and has developed mature production processes and high-performance tungsten materials.
Molybdenum has special mechanical and chemical properties,so it is widely used in a variety of fields,including the lighting industry molybdenum wire and molybdenum belt,semiconductor substrate for the electronic industry,sputtering target material,glass melting electrode,vacuum furnace heating chamber,etc.
Mechanical properties of molybdenum:Molybdenum is known for its high melting point and excellent high temperature strength and creep resistance.Gme adopts the integrated production process to ensure the high purity of molybdenum materials and optimize the material strength to improve the performance of pure molybdenum through alloying.We provide our customers with the most suitable molybdenum alloys according to the industry and working temperature of our products.
The chemical property of Molybdenum:molybdenum is opposite melting glass,the melting metal of majority,erosive sex waste gas,the acid of majority and other chemical material all have special anticorrosion performance.The corrosion resistance of molybdenum can be further improved by alloying(such as adding tungsten).
Molybdenum and its alloys are widely used in some special industries because of their extraordinary high temperature properties.For 15 years,GME has been focusing on the development and production of molybdenum and molybdenum alloys,with rich practical experience,GME provides you with stable molybdenum materials.
WL is a tungsten-base alloy doped with La oxide,and the doping ratio of La2O3 is 1%weight ratio.The structure and performance of WL depend on the processing rate of the alloy.
Compared with pure tungsten,WL has the following advantages:better creep resistance,higher creep resistance,higher recrystallization temperature and deformation rate,better high-temperature strength,and better cutting performance.
TZM is a kind of solid solution strong particle reinforced molybdenum-based alloy.The development of Mo-TI solid solution and the good dispersion of TI-C make TZM have excellent strength performance at 1400℃.
Compared with pure molybdenum,TZM has the following advantages:better creep resistance;Higher recrystallization temperature;Better high temperature strength;Better welding performance.
MHC is a particle-strengthened molybdenum-based alloy with excellent high-temperature strength.Hf and C elements added in MHC can generate HF-C compounds with good dispersion.Hf-c compounds have high particle strengthening effect,so they remain stable even at the high temperature of 1550℃.
Compared with pure molybdenum,MHC has the following advantages:better high-temperature strength;Higher recrystallization temperature;Better creep resistance.
Compared with TZM,MHC has the following advantages:MHC has higher high-temperature strength;So it can be used at higher temperatures.
ML is a molybdenum-based alloy doped with lanthanum oxide,which can be used as wire material.Lanthanum oxide nanoparticles enable ML to have a higher recrystallization temperature compared with other common molybdenum materials.
MLR is a molybdenum-based alloy doped with lanthanum oxide.MLR can be used as a semi-finished product of plate materials.The well dispersed and stable lanthanum oxide particles and tensile grain structure enable MLR to have good high-temperature performance(especially anti-creep performance)at the operating temperature of 2000℃.
Compared with pure molybdenum,MLR has the following advantages:higher stability for grain growth;Higher creep resistance;Better welding performance.
Compared with TZM at 1400℃,MLR has the following advantages:higher thermal stability,higher creep resistance,and better ductility at high temperature.
3.MLS(annealed stress-relieving state ML)
MLS is a molybdenum-based alloy doped with lanthanum oxide,which can be used as sheet material recrystallization in stress-free state to make fine crystal structure very stable at 1400℃.
Compared with pure molybdenum,MLS has the following advantages:better high-temperature ductility and better durability at 1400℃.
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