In alloys, the metals most associated with rhenium are tungsten and molybdenum, and rhenium improves the strength and plasticity of both, a phenomenon known as the rhenium effect. The initial recrystallization temperature of tungsten could be increased by 300℃ ~ 500℃ by adding a small amount of 3% ~ 5% rhenium, and the high-temperature strength and plasticity could also be improved.
Continue Reading →Niobium and niobium alloys can maintain high strength and good processing performance at high temperature. Can be made into thin plates and parts with complex shapes. Therefore, it can be used as the preferred thermal protection and structural materials on some ultra-high sonic aircraft, space vehicles, satellites, missiles and supersonic low-altitude rockets.
Continue Reading →The stress relief annealing temperature of cold-processed (97% deformation rate) pure zirconium is about 300℃. In order to reduce its corrosion and oxygen absorption rate and stable structure, stress annealing is generally carried out after cold-processed. After stress relief annealing, the strength of zirconium alloy does not change much, but the plasticity increases obviously.
Continue Reading →In order to obtain titanium tube casting with good repair welding quality, the following points should be paid attention to during repair welding:
Continue Reading →The heat treatment of niobium and its alloys includes uniform annealing, stress relief annealing, recrystallization annealing and thermal mechanical treatment. They have their own characteristics and influence each other. Uniform annealing results in non - uniform results. Stress relief annealing affects the grain size and orientation of recrystallization.
Continue Reading →An alloy based on one of the precious metals and composed of other elements. Precious metal alloys have the main characteristics of precious metals, and have better physical, chemical and mechanical properties, high reliability, stability and long life than single precious metals for their specific USES. Platinum alloy made in 1763.
Continue Reading →Titanium alloys have also encountered some bottlenecks in development, hindering further application. In this regard, all countries are stepping up the research of more "geili" titanium alloy and production technology, striving for a new breakthrough in high dosage, high performance and low cost.
Continue Reading →With the development of aerospace technology, the performance requirements of aerospace materials are increasing. Among all kinds of superalloy materials, such as tantalum, niobium, molybdenum and tungsten, niobium series alloys have been playing an important role in aerospace materials because of their excellent high-temperature mechanical properties, machinability, low density and low cost.
Continue Reading →Commercial niobium alloys are poor in strength and malleability, with 70% of niobium alloys requiring cold processing prior to annealing. As a result, niobium alloy with complex structure and low density can be easily manufactured. People generally prefer niobium to other refractory metals such as molybdenum, tantalum and tungsten. In the 1960s, many high-temperature niobium alloys were developed, mainly for nuclear weapons and space applications; However, further development has been limited since the early 1970s.
Continue Reading →Zirconium products are rich in variety, form, the most initial form of mineral zirconium sand, after caustic soda, water treatment, can produce zirconium silicate and zirconium chloride and other primary products; Continue calcination, chlorination, reduction can also be made into zirconia, industrial grade zirconium sponge products; If the technical level of purification and separation reaches a certain level, nuclear grade zirconium sponge can be made.
Continue Reading →W-Ti alloy target material is mainly produced by powder metallurgy process. The preparation method of tungsten titanium alloy target material processed by rolling includes the following steps:
Continue Reading →The production process of hafnium ingot is similar to that of titanium and zirconium.The hafnium isotopic isocrystal transition temperature is higher (1760℃), so thermal processing can be performed in a dense hexagonal region. There is no phase transition throughout the plastic process. Box-type electric furnace is used for forging heating. The temperature is 1100 ~ 1200℃. The holding time (min) can be half of the ingot diameter (mm). Each fire forging ratio (see alloy steel forging blank) can reach more than 4, the final forging temperature is usually not less than 850℃, forging equipment with hammer and hydraulic press can be.
Continue Reading →Platinum-iridium alloy is a binary alloy containing iridium, which is a continuous solid solution at high temperature. Iridium is volatile and oxidized and can significantly improve the corrosion resistance of platinum. Ptlrl0, Ptlr17.5, Ptlr25, Ptlr30 and other alloys have high hardness, high melting point, high corrosion resistance and low contact resistance. The chemical corrosion rate was 58% of pure platinum, and the oxidation weight loss was 2.8mg/g.
Continue Reading →Platinum-iridium alloy is a binary alloy containing iridium, which is a continuous solid solution at high temperature. Iridium is volatile and oxidized and can significantly improve the corrosion resistance of platinum. Ptlrl0, Ptlr17.5, Ptlr25, Ptlr30 and other alloys have high hardness, high melting point, high corrosion resistance and low contact resistance. The chemical corrosion rate was 58% of pure platinum, and the oxidation weight loss was 2.8mg/g.
Continue Reading →Molybdenum-Rhenium alloy is an alloy composed of metal molybdenum as matrix element and alloying element Rhenium. The rhenium effect increases plasticity in the alloy. The rhenium content in alloys is generally 11%~50%(mass fraction).
Continue Reading →Rhenium is a silvery-white metal with excellent mechanical properties and is an important element in aerospace field. Rhenium is the metal with the highest melting point except tungsten. Besides, rhenium has excellent anti-oxidation and anti-corrosion properties.
Continue Reading →The production process of hafnium ingot is similar to that of titanium and zirconium.The hafnium isotopic isocrystal transition temperature is higher (1760℃), so thermal processing can be performed in a dense hexagonal region. There is no phase transition throughout the plastic process. Box-type electric furnace is used for forging heating.
Continue Reading →The L605 superalloy is the most suitable cobalt-based alloy to be machined and used in working conditions lasting 1800°F. Due to its long and extensive use, this alloy has been used in a large number of working conditions, so it is a material with very general characteristics.
Continue Reading →Hafnium material is the core structure material of water - cooled nuclear reactor. Since the hafnium thermal neutron capture capability is very strong, the hafnium tube is used as the neutron absorber of the reactor control rod. The power of the reactor is regulated by its rise and fall in the insertion position of the fuel assembly, so that the chain reaction is fully controlled.
Continue Reading →With the rapid development of modern industry and high technology, new materials with high temperature resistance, oxidation resistance and corrosion resistance have been put forward more and more urgently. For example, in order to improve the heat conversion efficiency and energy efficiency of advanced aero-engines, the gas temperature needs to be further improved. The gas temperature has approached or even exceeded the limit service temperature (1200℃) of common nickel-based superalloy.
Continue Reading →Niobium and niobium alloy have high strength at high temperature, and have relatively small density compared with other high temperature and high strength metals such as tungsten and tantalum. They are easy to process and shape, so they are often used as key components of rocket engines.
Continue Reading →Titanium is a new metal, the performance of titanium is related to the content of carbon, nitrogen, hydrogen, oxygen and other impurities, the purest titanium iodide impurity content does not exceed 0.1%, but its strength is low, high plasticity. 99.5% of industrial pure titanium performance is:
Continue Reading →Zirconium bar is an alloy tubular material made of zirconium and other metals. Because of zirconium's excellent nuclear properties and corrosion resistance, zirconium alloy tube rods are often used in nuclear fuel assemblies and reactor structures in water cooled reactors, which are important nuclear materials. Pure zirconium rods are mainly used to make chemical equipment because they are expensive and not used much. The chemical composition and application of the commonly used zirconium tube rods are shown in the table.
Continue Reading →The technical field of niobium tube relates to a butterfly-shaped niobium tube processing device, in particular to a butterfly-shaped niobium tube processing device. High light efficiency sodium lamp is the national recommended energy-saving environmental protection products, but also the domestic and foreign light source enterprises vigorously development direction. High luminous sodium lamp series products have high luminous efficiency, which are used for urban road lighting, industrial and mining enterprise site lighting, market lighting, etc.
Continue Reading →A precious metal alloy is an alloy based on one of the metals in a precious metal and composed of other elements. Precious metal alloys have the main properties of precious metals. For their specific USES, they have better comprehensive physical, chemical and mechanical properties than single precious metals, as well as high reliability, stability and long life. Gold platinum alloy was obtained in 1763. In 1802, the hydrogen and oxygen blowing pipe was invented, which provided a high temperature means of smelting precious metal alloy. By 1847, all precious metals except osmium and ruthenium could be smelted.
Continue Reading →Rhenium, a silver-white metal, has the third-highest melting point of any element after tungsten and carbon, and the highest boiling point. Its density ranks fourth in the element, the first three are osmium, iridium and platinum. Rhenium has hexagonal crystal structure with lattice constants a=276.1 PM and c=445.6 PM.
Continue Reading →Titanium flange, titanium alloy flange performance characteristics and hot processing related matters needing attention.
Continue Reading →A niobium alloy consisting of a certain amount of titanium, aluminum and other alloy elements.
Continue Reading →Tantalum is a very corrosion-resistant metal. Due to the high production cost, Mo, W, Hf and other elements can be added into it to form a kind of alloy while maintaining its corrosion resistance. Tantalum is resistant to nitric acid, hydrochloric acid, concentrated sulfuric acid and corrosion of liquid metal. Tantalum has good machinability and its mechanical properties at room temperature are similar to those of medium carbon.
Continue Reading →Chromium zirconium niobium copper has higher conductivity and hardness than that of class 1 alloy. This kind of alloy can be obtained by cold deformation and heat treatment. Compared with type 1 alloy, it has high mechanical properties, moderate conductivity, in the medium degree of pressure, has a strong resistance to deformation, so it is a general electrode material, widely used for spot welding of low carbon steel, low alloy steel, stainless steel, high temperature alloy, low conductivity of copper alloy, and coated steel.
Continue Reading →The superconductivity of niobium titanium alloy superconductor under ultra high pressure was systematically studied. It is found that niobium titanium alloy still maintains the superconductivity with zero resistance under the pressure of up to 261.7GPa, which indicates that niobium titanium alloy is the most pressure-resistant superconductor known among all superconductors. This pressure is the highest pressure at which superconductivity has been reported.
Continue Reading →Rhenium is expensive, and it was not until 1950 that rhenium was transformed from a laboratory curiosity into an important new metal.
Continue Reading →There are two series of zirconium base alloys produced on an industrial scale: zirconium tin series and zirconium niobium series. The former is represented by zr-2 alloy and the latter by zr-2.5 Nb alloy. The composition and properties of zirconium and three zirconium alloys are shown in table.
Continue Reading →Titanium is more and more widely used in industrial production, aerospace, national defense and military industry as well as in daily life, so the requirements for titanium and titanium alloy c and its properties are more and more high. And raw materials of titanium alloy smelting is undoubtedly the most important a key ring, the smelting quality directly affects the subsequent processing performance of the finished product meets the product requirements, so as to promote the development of the titanium alloy smelting technology, including development of new technologies, such as electron beam, plasma cooling bed furnace, to improve the metallurgical quality and the mechanical properties of titanium alloy ingot has created good conditions and basis.
Continue Reading →A alloy wire composed of tungsten and rhenium. Tungsten-rhenium wire has the advantages of high strength at room temperature and high temperature, good plasticity after recrystallization, high resistivity, low resistivity, anti-oxidation and carbonization, strong resistance to "water cycle reaction" and good welding performance. Used for color picture tube hot wire, various tube filament and gate.
Continue Reading →Zirconium alloy has the characteristics of very low thermal neutron capture cross section, excellent corrosion resistance and high temperature creep resistance, and is widely used in nuclear reactors, such as pressure tubes and nuclear fuel cladding. With the development of nuclear energy towards high efficiency and high safety, higher requirements have been put forward for the mechanical properties, radiation resistance, thermal stability, creep resistance and corrosion resistance of nuclear zirconium alloys.
Continue Reading →(1) refine the structure and grain of steel, increase the grain coarsening temperature, so as to reduce the overheating sensitivity, and improve the strength and toughness of steel.
Continue Reading →Plastic and dental implants are subjected to high mechanical loads during their service life. While many materials currently used in additive manufacturing, including stainless steel and cobalt-chromium alloys, can cope with these mechanical stresses, there are concerns that they release toxic or allergic elements that can cause inflammation in surrounding tissues and reject implants.
Continue Reading →The quality of metal additive parts is closely related to the characteristics of metal powder, including powder size, sphericity, fluidity, loose packing density, etc. The application demand of "high precision", "high quality" and "ultra-precision" in aerospace, aviation, medical and other fields also puts forward higher requirements on the quality of metal 3D printing powder.
Continue Reading →Iron zirconium is an iron alloy composed of zirconium, iron, silicon and aluminum. The ferrozirconium used for steel making is ferrozirconium silicon, containing Zr15% ~ 45%, Si30% ~ 65%. The products produced by aluminothermic method are called zirconium aluminum iron because they contain aluminum, containing Zr>15%. In 1789, a new oxide called "Zircomia" was discovered at m.h.kelproth in Germany.
Continue Reading →The process of recovering vanadium oxide from metal or carbon into vanadium metal is an important part of vanadium metallurgical process. The first four methods are calcium thermal recovery, vacuum carbon thermal recovery, chloride magnesium thermal recovery and aluminum thermal recovery. Calcium thermal recovery an approach to industrial planning for the production of vanadium metal.
Continue Reading →In addition, tantalum is also widely used in national defense, aviation, aerospace, electronic computers, high-grade civil electrical appliances and electronic circuits of various electronic instruments.
Continue Reading →Tantalum niobium ore is the main raw material for tantalum production, but tantalum niobium ore is often accompanied by a variety of metals, so the main step of tantalum smelting is to decompose the concentrate, purify and separate tantalum and niobium, in order to make tantalum and niobium pure compounds, and finally make metal. For pure tantalum ingots fused by electron beam, 4mm thick plates are obtained by forging and rolling the ingots, and 1mm and 1.6mm thick plates are obtained by cross rolling.
Continue Reading →Tantalum niobium ore is the main raw material for tantalum production, but tantalum niobium ore is often accompanied by a variety of metals, so the main step of tantalum smelting is to decompose the concentrate, purify and separate tantalum and niobium, in order to make tantalum and niobium pure compounds, and finally make metal. For pure tantalum ingots fused by electron beam, 4mm thick plates are obtained by forging and rolling the ingots, and 1mm and 1.6mm thick plates are obtained by cross rolling.
Continue Reading →Its characteristics include the following steps: step 1: place molybdenum powder and niobium powder in the mixing tank of the mixer, seal the mixing tank and vacuum it, then stir and mix the molybdenum powder and niobium powder evenly under the condition of argon gas protection to obtain the mixed powder; The mass ratio of molybdenum powder to niobium powder is (9 ~ 19) : 1; Step 2. The mixed powder mentioned in step 1 is cold isostatic pressed to obtain the slab, and then the slab is pre-sintered under the condition of vacuum or hydrogen atmosphere protection to obtain the precast blank of molybdenum-niobium alloy.
Continue Reading →Pure zirconium has better corrosion resistance than stainless steel, nickel-based alloy, titanium and titanium alloy, and its mechanical properties and technology can be used for corrosion resistance of chemical equipment, especially acetic acid, pesticides, plastics and other industries such as reactors, heat exchangers, chestnut, valve, pipe, etc. The industrial zirconium market is benefiting from the rapid development of China's chemical industry.
Continue Reading →Tantalum and tantalum alloy is one of the few metal materials that can withstand the full concentration of sulfuric acid.
Continue Reading →1. Characteristics of shape memory: shape memory is when the parent phase of a certain shape is cooled above the temperature of Af to below the temperature of Mf to form martensite, and then the martensite is deformed below the temperature of Mf and heated below the temperature of Af. With the reverse phase transformation, the material will automatically recover its shape in the parent phase. In fact, the shape memory effect is a thermally induced phase change in Nitinol alloys.
Continue Reading →Because the rhenium has very excellent performance in the table below, thus adding rhenium form rhenium tungsten alloy, tungsten and molybdenum rhenium is added to the formation of molybdenum rhenium alloy, the alloy electric properties and high temperature ductility, processability can be greatly improved and strengthened, and can be widely used in high temperature heating body, temperature measuring thermocouple, tube cathode and other high temperature parts, etc.
Continue Reading →At present, the application of tantalum niobium new material related high-tech industries include electronics, precision ceramics and precision glass industry; Electro-acoustooptic device; Cemented carbide, aerospace and electronic energy industry; Biomedical engineering; Superconducting industry; Special steel and other industries.
Continue Reading →Zirconium and titanium have many similar physical and chemical properties. For example, their melting points are very high, pure titanium: 1668 ℃, pure zirconium: 1852 ℃. Zirconium and titanium have high chemical activity, and zirconium is higher than titanium, but the surface can form a dense passivation film, has a high corrosion resistance. Zirconium has better corrosion resistance than titanium in most highly corrosive media, which is why zirconium is more expensive than titanium, but is still used in many chemical applications.
Continue Reading →Nickel-titanium alloy is a shape memory alloy, which can automatically restore its plastic deformation to its original shape at a certain temperature. Its expansion rate is more than 20%, fatigue life up to 1×10 to the seventh power, damping characteristics than the ordinary spring 10 times higher, its corrosion resistance is better than the current best medical stainless steel, so it can meet all kinds of engineering and medical application requirements, is a very good functional material.
Continue Reading →Tantalum alloy formed by adding a certain amount of tungsten to tantalum. TaW binary alloy of tantalum and tungsten is an infinite solid solution. At 200℃, the reliability of ta-w alloy in acid and neutral medium is even higher than that of gold and foil. Tantalum tungsten alloy quality is good, tantalum basic in other environments can quickly form a layer of surface oxide film and carefully coated on its metal matrix, the oxide film is thin and very fine, to the basic all media are impermeable, and if the damage, can immediately get better.
Continue Reading →Zirconium alloy under high temperature and high pressure water in the nuclear reactor environment is easy to react with water vapour Zr + 2H2O + 2 = ZrO2 h2 write, produce hydrogen gas in high temperature environment is easy to cause hydrogen explosion, nuclear safety accident caused by ceramic coating of high strength, high hardness, wear resistance, high temperature resistance, oxidation resistance, corrosion resistance and chemical character such as stable performance can resolve the situation.
Continue Reading →A hydrometallurgical method for separating tantalum and niobium from raw materials containing tantalum and niobium by treating them with pure hydrofluoric acid or a mixture of hydrofluoric acid and sulfuric acid, followed by extracting the tantalum and niobium complexes in the treated solution with a methyl isobutyl ketone solvent and steam distilling the organic ketone phase containing tantalum and niobium.
Continue Reading →Tantalum tungsten alloy is a kind of alloy with tantalum as the matrix and a certain amount of tungsten added. Although both tantalum and tungsten can infinite solid solution, but when the tungsten content in more than 12-14 at % at % alloy plastic will be significantly reduced, when tungsten content is low, tantalum tungsten alloy as the pure tantalum low-temperature plastic, and has high strength, resistance to oxidation and corrosion resistant ability, so the lower……
Continue Reading →Titanium alloy is a relatively young metal, from the development of the present 60, 70 years of history, into the 20th century after the traditional steel and aluminum has been unable to meet the needs of aerospace, aviation, navigation and other fields, in 1954 by the United States company developed titanium alloy materials.
Continue Reading →Niobium powder, metal niobium powder, the formation of a dense oxide film on its surface with unidirectional conductive valve metal properties. The Nb2O5 oxide is a white powder with a purity of 99.999%. It is used to produce high purity lithium niobate crystals and special optical glass additives. The anodic oxide film has stable chemical properties, high resistivity, small leakage current and large dielectric constant.
Continue Reading →
