Tungsten Carbide cutting tools Welding Process (B)

Tungsten carbide cutting tools hardness (HRA) is 89 to 94, much higher than the high-speed steel; at 540 ℃ hardness (HRA) is 82 to 87, and the hardness of high-speed steel normal temperature (HRA83 ~ 86) fairly, but also has good chemical stability, heat resistance advantages. The tungsten carbide cutting tools welding include:

4. After welding insulation. After welding insulation is an important process brazed tungsten carbide insulation directly affects the quality of the welds. Greater tendency to crack tungsten carbide (YT class), prohibits the newly welded tool contact with the influx of cold water and ground, nor with acute cold wind. Should generally be slow cooling in quartz sand, asbestos powder or aluminum silicate fiber box, the tool should be densely stacked in an incubator, to the workpiece by a lot of heat insulation and slow cooling.

5. Remove excess flux near the weld will have cooled after welding workpieces into boiling water, then sandblasted, you can completely remove excess weld flux and oxide and other dirt. Under the conditions permit, the workpiece can be placed in the pickling tank for pickling, cold water tank must be cleaned and heat sinks have been pickled.

6. Check the weld seam quality checks after brazing  Have been checking out the defective parts, can be re-heated soldering, but it should minimize the number of re-welding, to avoid tungsten carbide cutting tools due to repeated heating and affect the quality. Workpiece cracks have occurred should be removed at the crack of tungsten carbide cutting tools will analyze the causes and re-welded.

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