Has anyone done cold welding? What was your experience? Sent from my SM-G973U using The H.A.M.B. mobile app
It’s BS all he’s doing is melting (with heat!!) the surrounding metal so it flows together, no filler rod.
Interesting, just googled it, only for non ferrous metal. I'll keep using the mig, and arc on aluminium.
In classes by Ron Fournier I took several years ago I seem to recall that being referred to as ‘fusion’ welding. Very tightly fitted joint and no filler rod required. However, it was .062” aluminum and oxy/acet torch. I don’t see any reason it couldn’t have been done with tig, but Ron was teaching gas welding technique at the time. I really don’t comprehend the term ‘cold welding’ in this application unless it is a relative term, as heat is clearly being applied. Ray
It is just fusing the two metals. Tig set on scratch start with high amperage for short duration. Depending on the time you choose between starts, the mass of the part stays fairly cool. This wouldn’t be used for structural parts.
So Dave how cold is it ? 20 below zero? Could I use it to keep my beer cold ? Or is it just tig parts together without filler rod?
They do in other videos. That's why I was curious about it. Sent from my SM-G973U using The H.A.M.B. mobile app
Is this anything like the guys at swap meets that used to sell miracle rod for gas welding aluminum? IIRC they used to have a bunch of beer cans that they welded together with the miracle rod.
Very short pulses of enough amperage to melt and fuse the metals. As mentioned autogenous welding fusing metal without filler rod except in a couple of spots where the gap between pieces needed a little filler. Non ferrous metals only is correct. Cold welding ? not a chance Don't kid yourself when you melt and fuse metal there is heat involved. Will the heat affected zone be tiny ? Yes. Will it cool quickly ? Yes. If he touched the weld too soon after it was done could he burn himself ? Yes. Should they learn to speak English ? Yes Will it do a weld without much damage to the paint ? Possibly but why would you want to do that ? I can't imagine welding a tear in the aluminum body of my F150 truck and worrying that I could keep the paint intact. (along with having a big ol Frankenstein style weld scar ) Oh but look the paint is still good Practical for anything we do ? Not really.
More commonly know as "PULSE" welding, My MILLER Dynasty comes with that feature and is very tunable as towards pulses per second, primary heat and secondary heat. Really helps in keeping the warpage down because it consentraits the heat and then cools. so you are not pushing a lot of heat forward
A tig weld with a perfect joint and fused without rod is just as strong as any tig weld. Being younger with good eyes and a steady hand I used to weld the stainless seams on tank trailers without a rod. Perfect fusion and penetration is possible. We are talking sheet metal normally but even thicker metals will behave the same with the right torch that provides enough heat and can be controlled properly. Cold welding?? No such thing. Metal won’t fuse without A heat source.
Depends on how thin the parent metal is, how much gap is involved, what the amperage is and how fast you move. One of those things that people who weld two razor blades together would do. I went to a swimming pool manufacturer one time to test for a job building stainless swimming pool liners. Extremely thin stainless with no gap. You had to run a downhill pass fusing the sheets together without a filler rod. Trick to it was turning the heat up and moving fast at a constant speed. No walking the cup. When you were done, there was 100% penetration and very little warpage. That's the only practical application for it I've ever been involved with.
The weld itself would be as strong as the parent metal but the area immediately adjacent to the weld , usually showing up as a narrow blue line on carbon or stainless steel, would only have 85% strength of the parent metal.
Correct. The term is autogenous welding. Cold welding is not a term. I have been using this process for tightly-fit sheet metal, for decades, with no issues.
Duct tape can also hold metal pieces together, with no added heat. I think I'll stick with that, when the O/A torch is too hot.
The Jalopy Journal
