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Wetting Analysis Test #1
The standard is an even flow to all four corners.
First wetting test
Left pictures shows a very small piece of silver solder. The middle shows the parts in the induction coil. Right are the finished parts. (These are also the left two parts in the top picture.) Flow wasn’t bad but not great.
Full piece of alloy wetting test
This is actually a bit more alloy than we would use for production (left pic.) The parts were pretty heavily fluxed and were heated to a red heat which was a bit too hot but we wanted to give them every chance.
The four on the left were tested with a very small piece of braze alloy. The four on the right were tested with the right amount of braze alloy for this size tip. The plated tips were marginally better but none of them worked well enough to be saleable in today’s market unless they were really cheap. The wetting is about where the U.S. was 15 to 20 years ago. They will stay on the saw pretty well but I don’t think they will look good.
Wetting Analysis Test #2 Wetting Test Two tips with a piece of .115” long wire, which is much too small, and two tips with A piece of .210” long wire which is about right depending on customer preference.
Strength test
We pretinned some tips, let them cool and then brazed them onto six inch long bars. This gives a nice long area to grip and to get good leverage. We tried to twist them. They wouldn’t twist off or break using normal force. We sent the parts to the customer for their testing. |
