Nine key points of using tungsten carbide brazing inserts

Posted by Joe Simth
3
Jan 20, 2017
139 Views

What are the key points of using tungsten carbide brazing inserts? There are mainly nine of that you should take care.

1.Enough rigidity of welding cutting tool

Enough rigidity is ensured by the maximum allowed size,high strength steel and heat treatment.

2.The tungsten carbide brazing inserts should be fixed securely

The tungsten carbide brazing insert should have adequate fixation, which is guaranteed by the groove and welding quality. Therefore, you should choose the groove shape according to the shape and geometric parameters of tungsten carbide insert.

3.Carefully check the tool bar

Before welding, please carefully check the insert and tool bar. Firstly, you should guarantee that the blade bearing surface have no serious bent and serious carburized layer. Besides that, you should clean the blade surface and the groove of tool bar and insert to ensure the effect of welding.

4.Select the appropriate solder.

In order to ensure the strength of welding, you should select the appropriate solder. In the welding process, you should ensure good wettability and flowability, and remove air bubbles. So that the solder and welding surface can fully contract.

5.Choose the right rholite used for welding.

Industrial borax is recommended. before using, borax must be dehydrated in the drying furnace and then crushed, sieved to remove mechanical impurities.

6.The mesh compensating shim should be used

In the process of welding fine carbide particles with high titanium and low Co content, net compensating shim with thickness of 0.2--0.5mm or mesh aperture of 2--3mm is recommended  to reduce the welding stress.

7.The correct use of grinding method.

Due to the brittleness of tungsten carbide, cracks are easy to form. In the process of grinding, you should avoid over heating and rapid cooling. At the same time, you should select the grinding wheel of appropriate size and correct grinding process. Grinding crack should be avoid, which will affect the service of the tungsten carbide brazing inserts.

8. The correct installation of cutting tool

Otherwise, it is easy to cause the tool vibration and cause damage to the tungsten carbide brazing inserts.

9. Correctly regrinding the carbide insert

The tool must be regrinding when the normal wear occured. After regrinded, the edge and corner of the tungsten carbide brazing inserts should be grinded with oilstone.

 

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