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Silver soldering

Best choice for carbide tip fixing

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Robonthemoor08/09/2018 05:49:12
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211 forum posts
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for fixing carbide tips onto tooling, do I need 35% or 55% silver content for best results?

Thor 🇳🇴08/09/2018 17:20:07
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1766 forum posts
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I have always used the 55% silver content type for soldering (brazing) carbide onto a steel shaft, and never had any come loose.

Thor

Edited By Thor on 08/09/2018 17:20:19

Robonthemoor08/09/2018 17:27:58
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211 forum posts
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Ok thanks for the comment, I will buy some.

mechman4808/09/2018 18:34:07
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2947 forum posts
468 photos

I have used Sif bronze rods with Sif bronze flux over the years, tips have always been rock solid.

George.

Keith Hale09/09/2018 13:13:05
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334 forum posts
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The biggest problem to be overcome when brazing carbide is the effect of the very different coefficients of expansion of the two materials that could cause cracking.

Help yourself by using the lowest brazing temperature ie something like 455.

Create a thicker joint than you would normally. Say aim for 0.2mm.

Don't quench the joint. Let it cool as slowly as you can. Immerse it in dry sand or wrap it in some insulation material like a clay wool blanket.

Regards

Keith

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