One kind of tungsten carbide - cobalt or Kekai tungsten carbide rod - cobalt - chromium in the thermal spraying powder production method,The present invention relates to a WC - Co or WC - Co - Cr thermal spray powder for preparing the powder or the tungsten carbide powder and cobalt powder, cobalt powder and chromium powder mixed in a certain ratio to prepare a slurry , spray granulation, the granulated powder is sieved and degreased in a vertical rapid sintering temperature sintering furnace , the body movement pattern of the powder falling through the continuous and uniform heating and cooling zones , and heating to complete the sintering zone , the protective atmosphere : nitrogen, sintering temperature : 1000 ~ 1700 ℃, sintering time : 0.1 ~ 5s, finally sintered powder required for grading and screening . The invention solves the spherical tungsten carbide rods -based composite thermal spray powder using the presence of long production cycle, low productivity and energy consumption and other problems when traditional methods of preparation ; present invention , the process is simple , continuous production , energy saving and environmental protection, the resulting powder composition uniformity , high sphericity and liquidity , and can be widely used in aerospace , machinery manufacturing , and petroleum and chemical industry.
Molybdenum carbide has a high melting point and hardness, good thermal stability and mechanical stability, and excellent corrosion resistance and other characteristics. Molybdenum is a silvery white refractory metal, a melting point of 2615 ℃, density of 10.2 g / cm 3, the expansion coefficient is small, a special tube is almost the same coefficient of expansion of the glass. Molybdenum stable at room temperature is higher than 600 ℃, rapidly oxidized.
2014年3月18日星期二
One kind of tungsten sheet
One kind of tungsten carbide - cobalt or Kekai tungsten carbide rod - cobalt - chromium in the thermal spraying powder production method,The present invention relates to a WC - Co or WC - Co - Cr thermal spray powder for preparing the powder or the tungsten carbide powder and cobalt powder, cobalt powder and chromium powder mixed in a certain ratio to prepare a slurry , spray granulation, the granulated powder is sieved and degreased in a vertical rapid sintering temperature sintering furnace , the body movement pattern of the powder falling through the continuous and uniform heating and cooling zones , and heating to complete the sintering zone , the protective atmosphere : nitrogen, sintering temperature : 1000 ~ 1700 ℃, sintering time : 0.1 ~ 5s, finally sintered powder required for grading and screening . The invention solves the spherical tungsten carbide rods -based composite thermal spray powder using the presence of long production cycle, low productivity and energy consumption and other problems when traditional methods of preparation ; present invention , the process is simple , continuous production , energy saving and environmental protection, the resulting powder composition uniformity , high sphericity and liquidity , and can be widely used in aerospace , machinery manufacturing , and petroleum and chemical industry.
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