Aluminum Brazing with Use of Flux
ฝัง
- เผยแพร่เมื่อ 5 ก.ย. 2023
- Aluminum brazing test. I use low temperature aluminum brazing rods and flux to improve strength of the braze.
SUBSCRIBE / @watdahel
My Other Channel / @focusknob
Buy at Amazon: Forney Alum-A-Flux amzn.to/3sCwFTc
Bernzomatic AL-3 Brazing Rod amzn.to/4653nv7
Bernzomatic TS8000 Torch amzn.to/3r6v6g3
Mapp Gas amzn.to/3Z4otY9
Visit www.watdahel.com
#Brazing #AluminumBrazing #Welding #metalwork - แนวปฏิบัติและการใช้ชีวิต
This is the review I was looking for for months now. I was really curious if flux made much difference. Thank you for taking time and demonstrate because I don't know much about welding. And thank you for showing to add some water to flux and how to heat it up properly, definitely learned something new today 👍
Great video. I like that you explained that the rod is mostly zinc. Zinc has a higher tensile strength than aluminum but is more brittle. Soldering and brazing are very close in technique, but we usually associate brazing with brass filler. I think soldering is a better description for this filler material. Both methods create a strong molecular bond.
super hepful man!! Love the methodical approach
Thanks for watching.
The chair is porous cast aluminum which is not the same challenge as the test pieces. Impurities kill brazing .
Ya I failed brazing that chair. I thought may be it's magnesium or some other alloy and not aluminum. The braze just would not stick to it and the flux didn't do a thing in that case.
Thanks !
I've always felt that aluminum brazing needed a flux to make the rod flow but didn't think anything was available.
Strange that nobody has produced a rod with a flux coating or flux core.
Aluminum brazing rod companies, ARE YOU LISTENING ??? There is a NEED out there !
Flux cored rods for aluminum brazing are available.
Thanks for sharing idea😊
glad to help
Flux is the way to go 100 %.
Wonder if there's a lower temperature flux available ?
There's lower temperature flux available but too expensive for me.
can melting rod fill into hairline crack? i'm thinking of repairing my bike stem it has a hairline crack
If you use flux there's a good chance it will wick into the crack. Without flux the surface tension of the aluminum will prevent it from wicking into the crack.
@@watdahel thx for your suggestion, will try for sure... 👍👍👍
I used the same flux, mine flux wouldn’t react at those temperatures. (Mine is a few years old)
You have to keep the flux dry and away from humidity they say. I kept the dessicant in the container and put it in a ziplock bag.
I bought the same exact one new just 3 days ago and tried it. It didn’t work.
I put the flux, and heated it up until the zinc I applied melted into the aluminum. It should have only attached to the skin of the aluminum.
That being said. Im a scientific guy, and I always leave room for doubt, because I could be wrong. I I was heating up small pieces of metal and perhaps the activation temperature of the flux is around 600-660C. Aluminum melts at 660C. So that’s a really tight gap. You’d have to be really sharp or be using larger pieces of metal, or go very very slow.
What I did try was: alumina-braze.
It is flux cored and comes in a “continuous coil.”
It was the only blend that worked. The flux successfully broke down the skin of the aluminum and the zinc-aluminum alloy got soldered onto the aluminum.
It was really easy to use and I recommend you try it. It is more expensive at 21$ for perhaps 20 ft.
I will have to try those flux cored rods some day
Is this some sort of global conspiracy to gag the definition of brazing? No matter where I look, the difference between welding and brazing is a demonstration of doing both. BUT WTF IS BRAZING?!??
Welding is melting two metals together. Brazing or soldering melts the filler metal but not the base metal.
It was so helpful to me thank you
Thanks for watching