Tom Walz
02-28-2008, 12:51 PM
One reason is that carbide is made to be wear and corrosion resistant. This can make it hard to braze. The solution is to treat the carbide. However some folks are not very good at it.
In the picture are two sets of 5 tips each. These are pretinned tips which means that braze alloy is on the carbide tip and the tip is ready to go on the saw blade.
The top five are from one source and caused serious failure problems. In the middle three you can see globs of braze alloy. (This is something like trying to finish a table with grease spots on it.) If the braze alloy won’t stick to the tip then the tip won’t stay on the blade. The outer two tips show the opposite problem. The braze alloy flowed over the edges of the tip leaving very little left for bonding.
The bottom five tips show the correct, even, smooth flow.
In the picture are two sets of 5 tips each. These are pretinned tips which means that braze alloy is on the carbide tip and the tip is ready to go on the saw blade.
The top five are from one source and caused serious failure problems. In the middle three you can see globs of braze alloy. (This is something like trying to finish a table with grease spots on it.) If the braze alloy won’t stick to the tip then the tip won’t stay on the blade. The outer two tips show the opposite problem. The braze alloy flowed over the edges of the tip leaving very little left for bonding.
The bottom five tips show the correct, even, smooth flow.