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Because of its good room temperature plasticity, high temperature strength and good plasticity after recrystallization, molybdenum alloys are widely used in electric vacuum devices, such as grid insulation screen.
Read More »Ion exchange separation of molybdenum and rhenium is based on the high selectivity of the resin for specific ions such as mo. baht. In the solution, Lai and Mo exist in the anion form of REO * and moo.
Read More »(1) Application in aerospace industry. The first generation of tungsten based high specific gravity alloys developed in China in the 1960s were developed. Since its birth, it has been successfully used in the navigator of the first man-made satellite developed by China.
Read More »Because of its high strength, good thermal conductivity and good processing performance, molybdenum is used as the substrate material of silicon rectifying elements and silicon controlled silicon components (the support of silicon wafer molybdenum disc).
Read More »Among many welding methods, TIG and plasma arc welding are developing rapidly. In pressure vessel, boiler and chemical equipment manufacturing industry, the former is widely used in the welding of thin-walled pipe, thick wall pipe and nozzle back weld, stainless steel pipe fittings and forming parts, and the latter is used in aerospace, nuclear energy, electronics, shipbuilding and other industrial sectors.
Read More »Quality of raw materials: the quality of raw materials directly affects the product quality of molybdenum wafers, and directly affects the parameters of silicon rectifying elements and silicon controlled silicon elements.
Read More »Molybdenum is a refractory metal. Molybdenum and its alloys have been widely used in aerospace, national defense, military industry, electronic and electrical metallurgy and glass industry because of their excellent electrical conductivity, thermal conductivity, corrosion resistance, low thermal expansion coefficient, high hardness and high temperature strength.
Read More »Molybdenum is usually strengthened by microalloying, carbide strengthening, solution strengthening and dispersion strengthening. (1) Micro alloying is mainly to add trace Ti, Zr, B, La and other alloy elements, the amount of which is 0.1% ~ 1% for solution strengthening.
Read More »Molybdenum is a refractory metal. Key and its alloys are widely used in aerospace, defense and military industry, electronic and electrical, metallurgy and glass industry due to their excellent electrical conductivity, thermal conductivity, corrosion resistance, low thermal expansion coefficient, high hardness and high temperature strength.
Read More »Molybdenum and molybdenum alloy materials can be made by machining, forming, metal processing and welding. The surface of molybdenum and molybdenum alloy is smooth and high precision after machining.
Read More »Electronic power equipment manufacturing industry is the main application field of molybdenum and molybdenum alloy materials. It includes filament, lighting and electronic tube components, special printed circuit board coating, microwave devices, medical electronic and electrical equipment, internal components of light tube ……
Read More »Molybdenum belongs to refractory metal, body centered cubic structure, with good conductivity and thermal conductivity, low thermal expansion coefficient, good corrosion resistance and environmental friendly and other sub components and electronic products, such as thin film semiconductor tube liquid crystal display (TFT-LCD) plasma display, field emission display, touch screen, can also be used in solar cell back electrode, glass coating and other fields.
Read More »In modern TFT-LCD manufacturing, molybdenum film is mainly used as the barrier layer of Al in conductive film, and part of molybdenum film is used as barrier layer of Al in conductive film.
Read More »Tungsten targets are mainly used in aerospace, rare earth smelting, electric light source, chemical equipment, medical equipment, metallurgical machinery, smelting equipment, petroleum, etc.
Read More »Tungsten alloys have many excellent properties after high temperature liquid phase sintering, such as high density, high melting point, high hardness, wear resistance, high tensile strength, high elongation, high temperature resistance, etc.
Read More »The influence of molybdenum foil width on the experiment was analyzed by analyzing the structure, working principle, sensitivity and measuring range of the magnetic deflection mass spectrometer. The optimum width of molybdenum strip is 0.60-1.00mm.
Read More »During unidirectional rolling, banded cell structure is formed in the molybdenum plate, which results in obvious anisotropy. The cross rolling is to process the molybdenum plate in the longitudinal and transverse directions, which can strengthen the uniformity and equiaxed effect of the internal structure of the material, effectively reduce the anisotropy of the material and improve its deep drawing performance;
Read More »The quality of the slab with open edge at 1 300 ℃ and 1 400 ℃ is good. If the opening temperature is too high, it will not only make the grains coarse and waste resources, but also have a negative impact on the structure and properties of the finished molybdenum sheet……
Read More »With the unprecedented development of the national economy, molybdenum and its alloys have been applied to the fields of electronics, machinery, aviation, military and so on in various forms.
Read More »Due to its high melting point, excellent high temperature strength, good conductivity and thermal conductivity, high wear resistance, good processability and low cost, molybdenum has become an ideal high temperature structural material under harsh conditions.
Read More »In the application of molybdenum products, sheet is the most widely used. When it is used to make all kinds of electric vacuum devices, molybdenum sheet should not only have enough strength, but also high plasticity and low anisotropy.
Read More »The tensile strength, yield strength and elongation of 0.5mm thick molybdenum plate annealed by different processes were measured by shear tensile test on electronic universal tensile testing machine (see table).
Read More »Although molybdenum has been discovered for more than 200 years, its large-scale development and utilization is still in this century, especially in recent decades.
Read More »The outbreak of the first World War led to a sharp increase in the demand for tungsten, and the supply of ferrotungsten was extremely tight. Therefore, molybdenum replaces tungsten in many high hardness and impact steels.
Read More »Molybdenum is a transition metal element with a value of 42 on the periodic table. Its chemical symbol is molybdenum. Molybdenum is silvery white, hard and tough. It does not react with hydrochloric acid or hydrofluoric acid.
Read More »There were 18 technicians who did not rest that summer in 1991. They translated the basic documents of foreign equipment, such as reduction furnace and airflow disperser, in the field of tungsten and gold manufacturing word by word.
Read More »The monitoring results of monthly prosperity index of China's tungsten and molybdenum industry show that in July, the prosperity index of China's tungsten and molybdenum industry was 25.1, up 2.6 points from the previous month, and has entered the "normal" range; the first composite index was 44.5, up 0.1 point compared with the previous month.
Read More »The properties of molybdenum and tungsten are very similar, its boiling point and conductivity are outstanding, and its linear thermal expansion coefficient is small, so it is easier to process than tungsten.
Read More »Molybdenum is a rare metal with high melting point (2620 ± 10 ℃), high elastic modulus (320-360 GPA), small linear expansion coefficient (20-100 ℃, 5.8x10-6-6.2x10-6), high melting point, low steam pressure and low evaporation rate.
Read More »The reason why liquid crystal displays such as mobile phones and televisions can display images depends on a thin layer of metal film on the glass substrate that can not be seen by the naked eye.
Read More »Sputtering, as an advanced thin film preparation technology, has two characteristics: high speed "and" low temperature ". It uses the ions produced by the ion source to accelerate the aggregation of high-speed ion current in vacuum and bombard the solid surface.
Read More »Molybdenum is widely used in the downstream, and is currently used in iron and steel industry, machinery, electronics, mining, agriculture, medicine and other fields, is an important resource.
Read More »Super heat resistant alloy and nickel base alloy molybdenum can improve the corrosion resistance of stainless steel, and it can also enhance the corrosion resistance and mechanical properties of nickel base alloy. Many nickel base alloys with high molybdenum content and strong corrosion resistance are widely used in many fields.
Read More »Storage molybdenum never appears as a natural element, but is always combined with other elements. Although many molybdenum minerals have been discovered, molybdenite (MoS2), a natural sulfide of molybdenum, is the only one with industrial mining value.
Read More »The properties of molybdenum and tungsten are very similar. Its boiling point (5560 °) and electrical conductivity are outstanding, and the coefficient of linear thermal expansion is small. The results show that the thermal conductivity [135 w / (m · K)] and specific heat [0.276 KJ / (kg · K)] are the best combination, which makes it a natural choice for thermal shock resistance and thermal fatigue resistance.
Read More »Tungsten and molybdenum materials are often used in different industries because of the following nine properties:
Read More »Molybdenum and molybdenum alloys have the characteristics of high temperature strength and high temperature hardness, good thermal and electrical conductivity, and good corrosion resistance. Therefore, it is widely used in chemical industry, metallurgy and aerospace industry.
Read More »The high melting point of molybdenum has become one of the main technical problems in the production of molybdenum. However, for the rapidly developing industry in the 20th century, it is the high melting point that attracts people. Almost every technological leap has something to do with the application of molybdenum.
Read More »Tungsten and its alloys are widely used in electronic and electric light source industries. It is used to manufacture all kinds of light bulbs. The filament of electron tube is made of doped tungsten filament with anti droop property.
Read More »The melting point of tungsten is 3410 ℃, the boiling point is about 5900 ℃, and the thermal conductivity is 174 w / m · K at 10-100 ℃. At high temperature, the evaporation rate is slow and the coefficient of thermal expansion is very small.
Read More »Tungsten and molybdenum react with carbon and carbonaceous gases: all kinds of carbonaceous gases and solid carbon (carbon black, coal, graphite) react with tungsten and molybdenum in the range of 1000-1200 ℃, forming carbides (W3C, WC and Mo2C, MOC), and the reaction is intensified at 1400-1600 ℃. Even if there is a small amount of carbide impurity in tungsten and molybdenum, it will make tungsten and molybdenum brittle.
Read More »Tungsten disulfide nanosheets are expected to improve the performance of LiFePO4 cathode materials. In the industrialization of lithium-ion battery, cathode materials are becoming the main bottleneck of its development.
Read More »His is the first layer of circuit that links transistors with other circuits in the chip. With this innovative selective deposition technology, the contact resistance that affects transistor performance and increases power consumption can be reduced.
Read More »Molybdenum pin, also known as molybdenum needle. It is like a needle like molybdenum product, its surface is bright and smooth. Due to its high melting point, corrosion resistance, good tensile strength and low coefficient of thermal expansion, molybdenum needle is widely used in electronic, chemical, mechanical equipment, electroplating equipment, environmental protection equipment and precision processing industries.
Read More »The main component of molybdenum electrode is molybdenum, which is prepared by powder metallurgy process. The content of molybdenum electrode is 99.95% and the density is more than 10.15g/cm3 to ensure the quality of glass and service life of electrode.
Read More »The main component of molybdenum electrode is molybdenum, which is prepared by powder metallurgy process. The content of molybdenum electrode is 99.95% and the density is more than 10.15g/cm3 to ensure the quality of glass and service life of electrode.
Read More »Molybdenum rhenium alloy is a kind of alloy composed of molybdenum and rhenium. The alloy shows rhenium effect to improve plasticity. The rhenium content in the alloy is generally 11% ~ 50% (mass fraction).
Read More »At present, ceriated tungsten electrode, which has no radioactive pollution, is a green environmental protection product. It can start arc easily with a small current, and the arc current is relatively small. Under the condition of low current direct current, ceriated tungsten electrode is very popular.
Read More »Argon arc welding (TIG) of tungsten plate is gas shielded welding with tungsten needle as one electrode of arc. Tungsten electrode, as an immiscible electrode, requires high melting point, less volatilization at high temperature and high strength at high temperature! The melting point of tungsten is 3690k, its boiling point is 5900k, and its red heat intensity is high. It is an ideal non melting electrode material.
Read More »The alloy based on tungsten with rhenium is a kind of tungsten alloy. The typical rhenium contents in the alloy are 1%, 3%, 5%, 10%, 20%, 25% and 26%, etc. Microcracks are often formed on the interface of tungsten.
Read More »The platinum alloy is composed of platinum base and tungsten. It forms a simple peritectic phase diagram, and the peritectic reaction temperature is about 2460 ℃. With the increase of tungsten content, the strength of Pt-W alloy increases significantly.
Read More »A niobium alloy is formed by adding a certain amount of tantalum and tungsten based on niobium. This kind of alloy has high tensile strength at high temperature and creep deformation resistance, so it has important application in spacecraft.
Read More »Tantalum based alloy is formed by adding a certain amount of tantalum. The Ta-W binary alloy composed of TA and W is an infinite solid solution. The strength of the alloy increases with the increase of tungsten content, but the plasticity of recrystallized alloy decreases significantly when the content of tungsten exceeds 12% ～ 14%.
Read More »A silver alloy consisting of silver and tungsten. Silver and tungsten are immiscible in both liquid and solid state. Silver tungsten alloy can only be made into sintered materials by powder metallurgy or extrusion.
Read More »A tungsten alloy based on tungsten and added with nickel, iron, copper, and other elements. The tungsten content of the alloy is 85% ～ 98%, which is prepared by powder metallurgy process. The alloy was first invented by J.C. McLennan in 1935.
Read More »It includes molybdenum tungsten alloy based on molybdenum and tungsten molybdenum alloy series based on tungsten. The alloy can be formed in any proportion and is a complete solid solution alloy at all temperatures.
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