Tungsten bars, rods, profiles and profiles plates, sheets, strip and foil of a deeper level of processing products export tariffs, so the 5% export tax rebate policy will continue. It can be understood, at least for now, for this type of tungsten production and exports, the country is still allowed, and even encouraged.
2013年7月18日星期四
supply tungsten carbide material bowl
Tungsten carbide material pot mainly for the production of tungsten carbide with a metal bowl and carbon black as raw materials, according to the proportion of a certain mixture again after the ball mill, screening for a quick tungsten carbide material bowl bowl mainly for the production of cemented carbide tungsten carbide. In tungsten carbide, tungsten carbon atoms embedded metal lattice clearance, does not destroy original metal lattice, interstitial solid solution formation, therefore also calls the caulking compounds (or insert). Tungsten carbide can be made of a mixture of tungsten and carbon heating system, the existence of hydrogen and hydrocarbons can accelerate the reaction. If use tungsten preparation of oxygen-containing compounds, vacuum processing products must eventually in 1500 ℃, to remove carbon oxides. Tungsten carbide is suitable for machining under the high temperature, can produce cutting tools, structure materials of kiln, jet engines, gas turbines, nozzle, etc.
With metal tungsten material bowl and carbon black as raw materials, mix in a certain proportion of the mixture into the graphite boat, in feeling or high carbon tube furnace, intermediate frequency electric furnace, carbonization under a certain temperature, then through the ball grinding, screening for a quick tungsten carbide powder.
Chengwei specializing in the production of tungsten carbide, chromium steel, manganese steel, mortar, bowl, mill, grinder sample preparation, vibration mill, crusher, drum machine, muffle furnace, drying oven, etc are widely used in mining, coal, metallurgy, steel, ceramic, X - ray fluorescence analysis and other departments, and LABS.
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