Tungsten Carbide Nozzle Sintering Technology IV

However, there are some problems of tungsten carbide nozzle hot pressed sintering still exist, such as the complicated producing equipments, the control is strict, the limit of material, large energy consumption and low efficiency. After vacuum sintering, optimizes tungsten carbide nozzle by hot isostatic pressing (HIP), which can exclude the pores and structural defects inside the cemented carbide and enhance densification of the material. Hot isostatic pressing (HIP) is a process with high temperature and pressure through, the heating temperature is usually 1000°C-2000°C, the working pressure reaches 200MPa, and uses high-pressure inert gas or nitrogen in a sealed container as the pressure transmission medium, which excerts a uniform pressure for the material under the high temperature and high pressure. In the late of 1960s, HIP technology has been widely used in tungsten carbide.














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