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Brazing carbide tips

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michael lennon	19/10/2018 12:52:31
2 forum posts	How do you braze carbide tips for lathe tools?
Involute Curve	19/10/2018 13:30:23
337 forum posts 107 photos	I use gas welding kit and sifbronze No1, but pretty much any brazing rod will do and you could prbably get away with Map gas if its a small tool and tip.
Ian S C	19/10/2018 13:49:30
7468 forum posts 230 photos	I just use LPG, and what ever rod that comes to hand, I have used brass. I now have access to LPG and oxygen and will use that in future if I need it. Ian S C
Simon Williams 3	19/10/2018 13:54:13
728 forum posts 90 photos	+1 from me for Sifbronze, though silver solder will also work, but not always. It seems there are some grades of carbide the flux won't wet, so the solder/braze won't run on to the insert. You just have to find a different grade of insert, though it might now be possible to use some of the more active fluxes and get a better result with these difficult examples. I've only tried doing this with J & M easyflo no 1 which is a pretty benign flux, and intolerant of dirt or funny oxides, so it isn't 100% guaranteed to work. I don't know the science behind this but you can certainly get good adhesion with most insert materials. If it works at all it'll be a good job. I'm guessing, though I haven't tried the experiment, that coated inserts may also cause problems in getting the flux to wet them.
Brian Wood	19/10/2018 14:31:41
2742 forum posts 39 photos	Simon, Coated inserts are no problem, just use the proper Sifbronze flux and rods Brian
Keith Hale	21/10/2018 11:26:45
334 forum posts 1 photos	Hi Michael. See personal message. Keith Edited By CuP Alloys 1 on 21/10/2018 11:44:27

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