Discussion in 'Fettling Forum' started by presscall, Mar 9, 2020.
Always interesting those tests
Thanks for sharing
@presscall That's so bloody cool John.
You can see the nice fit and just see the braze.
If you had the patience of a saint you could polish it up with 1000 or 2000 grit and see the braze wicking into the parent metal. I'm always fascinated seeing these types of interactions. Sections and grain structures are also amazing to see.
I’ll give that a go Alec. You’ve got me intrigued with what might appear.
I used polishing compound on a Dremel polishing drum.
455X magnification. Evidence of the silbraze ‘wicking’ visible on the lower boundary area, particularly a section in the bottom left area, where the molten braze metal has penetrated micro-pits/troughs in the brass. Predictably, any such pits/troughs in the surface of the surgical steel are too small to see at this magnification. Reassuring if that was to be a hypodermic needle used as intended!
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