Silver soldering

Silver soldering

This topic has 5 replies, 4 voices, and was last updated 9 September 2018 at 13:13 by Keith Hale.

Viewing 6 posts - 1 through 6 (of 6 total)

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8 September 2018 at 05:49 #370900
Robonthemoor
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@robonthemoor
for fixing carbide tips onto tooling, do I need 35% or 55% silver content for best results?
Advert

8 September 2018 at 05:49 #26174
Robonthemoor
Participant
@robonthemoor
Best choice for carbide tip fixing
8 September 2018 at 17:20 #370959
Thor 🇳🇴
Participant
@thor
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
8 September 2018 at 17:27 #370961
Robonthemoor
Participant
@robonthemoor
Ok thanks for the comment, I will buy some.
8 September 2018 at 18:34 #370965
mechman48
Participant
@mechman48
I have used Sif bronze rods with Sif bronze flux over the years, tips have always been rock solid.

George.
9 September 2018 at 13:13 #371058
Keith Hale
Participant
@keithhale68713
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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