Tungsten Carbide Nozzle Welding Procedure

In order to improve drilling efficiency, people invented a kind of nozzle, which is longer and closer to the button. The jet-flow impacts the bottom and disperses, its the fluid up and down do not interfered, which can effectively enhance drilling rate of 28%. However, the nozzle inside structure is too complicate to manufacture by normal compression molding. So some researchers used heat pressing impregnate-powder casting to attempt.

But the materials contain Cu and other soft metals, which decreases the hardness, anti-corrosion of nozzle and shortens the lifespan. Therefore, a new method brazing after compression section molding appeared. It still remains some problems that the strength of soldering seam is not good, which replaced by vacuum welding procedure.

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