Ferrotungsten 75-85

powder: It is produced by hydrogenation of tungsten trioxide or ammonium paratungstate. The process of preparing tungsten powder by hydrogen reduction method is generally divided into two stages: the first stage is to reduce tungsten trioxide to tungsten dioxide at 500 ~ 700; in the second stage, tungsten dioxide is reduced back to tungsten at 700 ~ 900 iron powder. The regeneration reaction is usually carried out in a tubular electric furnace or a rotary kiln. The properties of regenerated ferrotungsten powder mainly depend on the reduction process. When regenerating in a tube furnace, the main process parameters that affect the regeneration speed are the regeneration temperature, the load of tungsten oxide in the boat, and the moving speed of the boat. , hydrogen flow rate and water content in hydrogen. As the return temperature increases, the particle size of tungsten powder becomes coarser. In addition to the hydrogen reduction method, the tungsten oxide carbon reduction method is used to prepare tungsten powder, and the recovery temperature is higher than 1050 degree . The tungsten powder obtained by this method has low purity. In addition, research on the process of returning calcium, aluminum, and zinc to original tungsten oxide is also in progress. A tungsten chloride hydrogenation method has been developed to produce high-purity ultra-fine tungsten powder for special application requirements. The particle size of the obtained ferrotungsten powder can be less than 0.05 m.

can be made into wires, rods, pipes, plates and other processing materials and products of certain shapes. Ferrotungsten powder is the main raw material for processing powder metallurgy tungsten products and tungsten alloys. An important use of ferrotungsten powder is to make tungsten carbide powder, and then make carbide tools, such as milling cutters, turning tools, drill bits and molds. Ferrotungsten powder can be mixed with other metal powders to make various tungsten alloys, such as tungsten-rhenium Alloys, tungsten-molybdenum alloys, tungsten-copper alloys and high-density tungsten alloys.