Tungsten Carbide Nozzle Welding Procedure III

The influence of welding time for quality: In a short time, the welded surface fully physical contact gradually, and diffusion of atoms become sufficient, welding shear strength and welding rate increases by welding time steadily. However, when the strength of soldering seam reaches the strength of tungsten carbide, if adding welding time continuously, it will make tungsten carbide particles become bigger and bigger so that some micro-bore will appear and the strength of soldering seam will decrease, which because of the different spreading speed between Co and Ni. Therefore, reasonable welding time is a guarantee for improving the soldering seam strength.

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