Tungsten Scrap

Tungsten trioxide is a powder metallurgy raw material for the production of cemented carbide and tungsten products. According to the national standard (GB/T 3457-1998), it is divided into two types, namely tungsten trioxide (referred to as yellow tungsten), the molecular formula is WO3, and blue tungsten oxide (referred to as blue tungsten, which is a mixed tungsten oxide), molecular formula W20O58. Yellow tungsten is light yellow crystalline powder, blue tungsten is dark blue or blue-black...

Tungsten trioxide is a light yellow triclinic powder crystal. When the temperature is higher than 740 ℃, it transforms into an orange tetragonal crystal, and returns to its original state after cooling. It is stable in air, the melting point is 1473℃, the boiling point is higher than 1750℃, and the relative density is 7.16. Tungsten trioxide is the most stable one among tungsten oxides. It is insoluble in water and inorganic acids except hydrofluoric acid. It can be dissolved in hot...

Tungsten oxide has gas sensitivity and is used for the detection of nitrogen dioxide, ammonia and other toxic gases. Tungsten oxide thin film gas sensors and tungsten oxide nanoparticle sensors have been prepared, and the discovery of nanosensors has greatly improved the detection of low-concentration toxic gases Company Profile Jiangsu Leiji Metal Materials Co., Ltd. is a manufacturer of sodium tungstate, tungsten bar, sodium molybdate, ammonium molybdate, molybdenum bar, and other tungsten...

Part of tungsten oxide is used in the production of chemical products, such as paints and coatings, catalysts in the petroleum industry, etc.; but tungsten oxide is an intermediate product, and a large amount of tungsten oxide is used in metal tungsten powder and tungsten carbide powder, and then used in the production of metal tungsten products It is widely used in the production of tungsten alloy products, such as tungsten copper, tungsten nickel, tungsten nickel iron, tungsten silver,...

Ferro-tungsten iron alloy series (tungsten content: 70%-80%) is an alloy composed of tungsten and iron, which is used as an alloy additive for steelmaking. Commonly used ferrotungsten contains 70% tungsten and 80% tungsten. Ferrotungsten is prepared from wolframite by carbon reduction in an electric furnace. Mainly used as alloying element additive for tungsten-containing alloy steel (such as high-speed steel). There are three varieties of ferrotungsten produced in my country, including W701,...

Iron tungsten is smelted by electric furnace. Due to its high melting point, it cannot be released in liquid state, so it is produced by agglomeration method or iron extraction method. Before the 1930s, a small (100-500 kVA) single-phase electric arc furnace was generally used for agglomeration smelting. Later, a three-phase electric furnace was used, and the iron extraction method was developed. There are a large number of tungsten ore in Jiangxi, Hunan and Guangdong in China, and the reserves...

Tungsten is a silver-gray metal. The atomic weight is 183.85. Electronic structure 4f145d46s2. Density (20°C) 19.3g/cm3. Melting point 3400 ℃. Boiling point 5555℃. Tungsten forms solid solution with iron and two intermetallic compounds Fe2W and Fe3W2 or Fe7W6, but both are unstable at high temperature. The melting temperature of ferrotungsten containing W75% to 85% is higher than 2500 ° C, so it cannot be discharged from the furnace, and can only be produced by the accumulation method or the...

Iron alloys mainly composed of tungsten and iron. It also contains impurities such as manganese, silicon, carbon, phosphorus, sulfur, copper, and tin, and is an alloying agent for steelmaking. According to the different tungsten content, ferrotungsten is divided into: FeW75 (including W70%～80%, C≤0.20%, P≤0.04%, S≤0.08%, Si≤0.5%, Mn≤0.25%) and FeW80 (including W75.0%～85.0%, C≤0.20%, P≤0.04%, S≤0.08%, Si≤0.7% and Mn≤0.25%). Company Profile Jiangsu Leiji Metal Materials Co., Ltd. is a...

Iron tungsten is smelted by electric furnace. Due to its high melting point, it cannot be released in liquid state, so it is produced by agglomeration method or iron extraction method. Before the 1930s, small (100-500 kVA) single-phase electric arc furnaces were generally used for agglomeration smelting. Later, three-phase electric furnaces were used, and iron extraction methods were developed. There are a large number of tungsten ore in Jiangxi, Hunan and Guangdong in China, and the reserves...

In addition to certain requirements for the impurity content of tungsten powder, the oxygen content should be controlled within a certain range. The particle size of commonly used tungsten powder is generally 2-10 μm in Fisher’s average particle size. The tungsten powder is in the shape of polygonal particles. In addition, the specific surface, bulk density and tap density of tungsten powder also vary within a certain range. The performance of tungsten powder has a direct impact on the...

Tungsten is mostly used in the production of cemented carbide and ferrotungsten. Tungsten and chromium, molybdenum and cobalt form heat-resistant and wear-resistant alloys for making tools, metal surface hardening materials, gas turbine blades and combustion tubes, etc. Tungsten and tantalum, niobium, molybdenum, etc. form refractory alloys. Tungsten copper and tungsten silver alloys are used as electrical contact materials. High-density tungsten-nickel-copper alloy is used as a radiation...

Tungsten powder is the main raw material for processing powder metallurgy tungsten products and tungsten alloys. Pure tungsten powder can be made into wire, rod, tube, plate and other processed materials and certain shaped products. Tungsten powder mixed with other metal powders can be made into various tungsten alloys, such as tungsten-molybdenum alloy, tungsten-rhenium alloy, tungsten-copper alloy and high-density tungsten alloy. Another important application of tungsten powder is to make...

See tungsten trioxide for toxicity of tungsten powder. Put the product into a clean polyethylene plastic bottle, tighten the cap, put the plastic bottle in a wooden box, and fasten it with soft objects around it, or put the product into an iron drum lined with polyethylene plastic bags, each box (Drum) net weight 30kg. The product should be stored in a dry, ventilated warehouse without acid and alkali atmosphere to prevent oxidation. The product should be protected from rain and moisture during...

The quality of tungsten powder directly determines the quality and alloy properties of tungsten carbide (WC). The classification of tungsten powder can effectively change the properties of the powder, solve the problem of coarse and fine powder, and reduce the difference between the minimum particle size, the maximum particle size and the average particle size. , to produce coarser and more uniform tungsten carbide powder; due to the characteristics of tungsten, it is not easy to be broken, so...

Tungsten bars include tungsten rods, tungsten steel rods, sintered tungsten rods, mainly used for forging into material components, knives and warheads, light bulb tungsten wires, electrical contacts and thermal conductors, crankshafts and cylinder tungsten wire barrels, heat-resistant steel Various ingredients. Doped tungsten strips are used to produce filaments or tube filaments, which guarantee a significant resistance to high temperatures. Pure tungsten is a natural metal mined from the...

Tungsten is a rare non-ferrous mineral product in the world, with a very low annual output and a wide range of uses, mainly used as raw materials for casting ingredients. Tungsten comes from a white sand-type ore body, and the ore line is very small. After multiple processes such as mining, grinding, water gravity separation, and refining, tungsten ore powder with a grade of more than 95% is obtained, and then refined and formed by a high-temperature electric furnace. The finished product is...

Turning tool bits for processing, tungsten wires for lighting equipment and various heat conductors, ingredients for crankshafts and cylinder barrels of advanced automobiles, ingredients for casting various heat-resistant steels, widely used in guns, artillery, rockets, satellites, aircraft , the manufacture of ships 1. Molybdenum products have the characteristics of easy oxidation. To remove heavy oxides, treat with strong acid (fluoric acid, nitric acid, hydrochloric acid, etc.). Please be...

Tungsten carbides have high hardness, wear resistance and refractoriness. These alloys contain 85% - 95% tungsten carbide and 5% - 14% cobalt, which acts as the binder metal, which gives the alloy the necessary strength. Some alloys mainly used for machining steel also contain carbides of titanium, tantalum and niobium. All of these alloys are manufactured by powder metallurgy. When heated to 1000 - 1100 ℃, they still have high hardness and wear resistance. The cutting speed of carbide tools...

Tungsten is mostly used in the production of special steels. The widely used high-speed steel contains 9%-24% tungsten, 3.8%-4.6% chromium, 1%-5% vanadium, 4%-7% cobalt, 0.7%-1.5% carbon. The characteristic of high-speed steel is that it can be quenched automatically at a high tempering temperature (700-800℃) in the air, so it maintains high hardness and wear resistance until 600-650℃. Tungsten steel in alloy tool steel contains 0.8%-1.2% tungsten; chromium-tungsten silicon steel contains...

Tungsten is a non-ferrous metal. Usually people divide metals into two categories according to their color and properties: ferrous metals and non-ferrous metals. Ferrous metals mainly refer to iron, manganese, chromium and their alloys, such as steel, pig iron, iron alloys, cast iron, etc. Metals other than ferrous metals are called non-ferrous metals. Tungsten belongs to the category of non-ferrous metals. The strength and hardness of non-ferrous alloys are generally higher than those of...