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According to information, in 2001, China produced 72000 tons of molybdenum concentrate, 33000 tons of molybdenum oxide, 7600 tons of ferromolybdenum, 9500 tons of various ammonium molybdate, 1183 tons of molybdenum bars……
Read More »Molybdenum reserves on the earth are relatively small, accounting for only 0.001% of the weight of the earth's crust. The total molybdenum reserves are about 15 million tons, mainly distributed in the United States, China, Chile, Russia, Canada and other countries.
Read More »At present, more and more chips in our country are gradually localized, but many domestic chip production lines are imported, and the target material, as the key component of the chip production line, basically depends on import.
Read More »In semiconductor integrated circuits, thin film science is a very important research field in developing and manufacturing semiconductor devices. The target material is the key material in the surface coating technology.
Read More »Molybdenum target refers to that the anode of X-ray tube is made of molybdenum (MO). The relative energy of molybdenum target ray is relatively low, which is "soft" ray. Under the condition of lower tube voltage required by mammography, it is especially suitable for mammary glands with more adipose tissue and lower density of parenchyma, or with smaller thickness and higher density of parenchyma.
Read More »Cerium tungsten electrode
Cerium oxide is added to tungsten to produce cerium tungsten electrode.
Cerium tungsten has the following advantages over thorium tungsten
*Non radiation * low melting rate * long welding life * good arcing performance. Therefore, Ce-W is the best substitute for Th-W in low current welding environment.Ce-W electrode is mainly used in low current DC welding.
Because of the characteristics of tungsten, it is very suitable for TIG welding and other electrode materials similar to this kind of work. Adding rare earth oxide to tungsten metal to stimulate its electron work, the welding performance of tungsten electrode can be improved:
Read More »The shielding parts of high specific gravity tungsten alloy are made of "high density alloy", which is based on tungsten and added with a small amount of Ni, Co, Mo and other elements.
Read More »With the development of science and technology, the application of molybdenum in high technology and other fields is also increasing. Next, let's learn about the application of molybdenum and its alloys.
Read More »Someone asked: if you throw a huge tungsten ball with a diameter of 100 meters into a crater, can the tungsten ball sink to the center of the earth?
Read More »Although the melting point of tungsten is higher than that of rhenium, the processing difficulty of tungsten alloy is also higher, which is more brittle at high temperature and easier to be oxidized;
Read More »1. Pure molybdenum and high purity molybdenum
(1) Pure molybdenum
It includes sintered molybdenum products (such as crucible, etc.) and processing molybdenum plate, molybdenum bar, molybdenum strip, molybdenum wire, molybdenum sheet and profile, etc.
Improving the properties of molybdenum and molybdenum alloy is an inevitable way to expand the application field and meet the increasing performance requirements. A series of researches on high performance molybdenum and molybdenum alloys have been carried out at home and abroad.
Read More »With the development of science and technology, the application of molybdenum in high-tech and other fields is also increasing. Let's take a look at the application of molybdenum and its alloys.
Read More »At present, the main manufacturing methods of molybdenum and molybdenum alloy products are smelting, powder metallurgy, chemical vapor deposition, rolling and forging.
Read More »In refractory metals, molybdenum and its alloys have good thermal conductivity, conductivity and low expansion coefficient. They have high strength at high temperature (1100 ~ 1650 ℃), and are easy to process compared with tungsten. Therefore, their products are widely used in aerospace and nuclear industries, electronics, building materials, instruments and other industries.
Read More »Molybdenum was used in the early electronic industry. With the emergence of solid-state electronics, a new application field is gradually formed; the current application depends on the metal's high melting point, high heat transfer, machinability, strength and sinter ability.
Read More »Molybdenum plate with width from 400mm to 510mm is carried out on 550mm cold rolling mill, while molybdenum plate with width from 700 mm to 800mm is carried out on 1200mm four high reversing cold rolling mill.
Read More »The high temperature properties and microstructure of Mo La alloy and TZM alloy at 1000 ~ 1800 ℃ were studied. The results show that the molybdenum lanthanum alloy has higher comprehensive properties of strength and plasticity when the temperature is less than 1400 ℃.
Read More »Molybdenum and molybdenum alloy materials can be made by stamping, metal processing and welding. The surface of molybdenum alloy is processed with high precision. However, attention should be paid to the fact that molybdenum has high temperature strength but poor room temperature strength, and its toughness is not as good as that of carbon steel or brass.
Read More »Die castings can be processed with nonferrous metals and alloy iron, made from large amounts of molybdenum or tungsten, or with a small amount of zirconia. Die castings are usually used for multi face pressing and are specially designed to prevent delamination or cracking when pressing the bar.
Read More »After high temperature sintering, molybdenum powder is rolled into molybdenum discs. After polishing and corrosion, it is found that some batches of molybdenum discs have defects such as edge falling, delamination and small black spots on the surface.
Read More »Since the great development of vacuum sintering technology in cemented carbide production practice in 1960s, vacuum sintering technology has also been applied in the field of tungsten molybdenum powder metallurgy.
Read More »The molybdenum content of tungsten products is very strict, because the existence of molybdenum will seriously affect its performance. Limit its application scope. The chemical properties of tungsten and molybdenum are very similar, so it is very difficult to separate tungsten from molybdenum.
Read More »Since the service temperature of high temperature vessel of single crystal furnace is over 2000 ℃, tungsten crucible is the only choice for high temperature vessel of single crystal furnace.
Read More »As a derivative of raw material molybdenum wire, molybdenum strip is widely used in lighting industry, mainly used in high-pressure mercury lamp, high-pressure sodium lamp, metal halide lamp, film and television light source, and its quality has a great impact on the lamp life and interface welding quality.
Read More »Molybdenum is a kind of high temperature resistant material. It is widely used in modern industry, but its price is high. In order to reduce the cost, powder metallurgy production method is widely used to manufacture molybdenum products. Molybdenum crucible is one of them.
Read More »Molybdenum wire has high melting point, high strength and elastic modulus, small expansion coefficient, low vapor pressure, good electrical and thermal conductivity and excellent corrosion resistance.
Read More »Tungsten has excellent properties such as high melting point, high density and good high temperature conductivity. It plays an important role in national defense industry and national economy, especially in aerospace, nuclear industry and other cutting-edge fields.
Read More »When the metal material is deformed, the crystal will rotate, and most of the crystals will gather in some orientation position (or deviate from the random distribution), which is the result of texture formation.
Read More »In order to improve the yield of molybdenum wire and reduce wire breakage, the quality of raw materials should be improved firstly, and then the drawing process should be standardized and stabilized：
Read More »Due to the metal, ceramics, such as composite materials, the requirements of modern manufacturing technology for its heat treatment has become higher and higher, so the relevant production conditions have become increasingly stringent.
Read More »The preparation of tungsten, molybdenum products is mainly realized by powder metallurgy. After the ore is refined and then reduced (the oxides of W and Mo are reduced in hydrogen) to obtain the corresponding metal powder (purity above 99.9%).
Read More »Under uniaxial tension and compression, the single-phase amorphous alloy has high strength (about 2 GPa) and elastic strain (about 2%). However, the failure of amorphous alloy along a single shear band shows the characteristics of brittle material, that is, there is almost no plastic deformation.
Read More »Tungsten has unique characteristics, which is an important material for high temperature heating body and high temperature heat insulation. Its brittleness brings great difficulties to its deep processing, especially in the spinning thinning process of P / M tungsten tube blank under multi-directional force, even if the tube blank with good deformation performance can be produced.
Read More »Porous tungsten as a high current density cathode is one of the important applications of tungsten. Its porous framework is an important part of reserve cathode. The framework should be impregnated with electron emission compounds.
Read More »Tungsten, due to its unique physical and chemical properties, is widely used in the field of high temperature resistance and high strength. However, the content of tungsten in the earth's crust is very low, and the resources are also continuously depleted.
Read More »Molybdenum disc is the support of contact electrode and silicon rectifier of silicon controlled silicon element. With the rapid development of electronic industry, the output of silicon molybdenum components is also increasing.
Read More »Porous tungsten and its components based on porous tungsten are widely used in aerospace, power electronics and metallurgical industry. For example: vaporizer of mercury ion rocket engine;
Read More »Roller track:The roller track of molybdenum crucible is in the order of a → B → C → D → e → f → g → h → I → J → K. It is composed of five curves, namely, the forward cutter curve, the reverse cutter curve, the feed curve, the die sticking curve and the exit curve.
Read More »Pore characteristics：The basic physical phenomenon of mercury intrusion method is to force non wetting and non reactive liquid mercury into porous samples under a given external pressure.
Read More »Molybdenum is a rare metal, an important non renewable strategic material, and an important basic material for realizing national modernization and building modern national defense. Molybdenum is a non renewable resource. With its increasingly extensive application, the demand is increasing, and its price is getting higher and higher.
Read More »The porous tungsten framework sintered at high temperature is easy to be brittle and cannot be machined. As mentioned above, tungsten copper (plastic) material is obtained by infiltrating copper or plastic to improve its processing performance, and then turning is carried out.
Read More »The porous tungsten billets sintered at high temperature are brittle and can not be machined. The turning performance can be improved after copper infiltration.
Read More »In microwave vacuum electronic devices, cathode as an electron emission source, its performance directly affects the performance and life of the device, which is referred to as the "heart" of vacuum electronic devices.
Read More »As an important refractory metal material, tungsten has the characteristics of high melting point, high thermal shock resistance, high thermal conductivity, low expansion coefficient, low vapor pressure and good radiation resistance. It has extremely important applications in aerospace, nuclear industry, chemical industry and other extreme environment fields.
Read More »Because of its high strength at room temperature and high temperature, excellent wear resistance, corrosion resistance and good thermal physical properties, refractory metal molybdenum is widely used in aerospace, electrical and electronic fields.
Read More »(1) Molybdenum alloy with purity over 99.9% produced by sputtering method is used as raw material. Molybdenum alloy is put into the feeding device of electron beam cooling bed furnace, that is, spiral tube.
Read More »Molybdenum foil has pure molybdenum foil and rare earth molybdenum foil. The addition of rare earth oxides to molybdenum can significantly improve the microstructure, recrystallization temperature and high temperature properties of the materials. Due to the different physical and chemical properties of different rare earth oxides, the properties of alloy materials are different.
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