did you know?

[journeyman]

Tackmig and Wheelchair

thanks very much for all the info

[c wagner]

Cold Metal Transfer ?
Neo

Here is a link from the Fronius website that explains CMT. Looks like a pretty cool process!

http://www.fronius.com/cps/rde/xchg/SID-0AFF0106-83753B87/fronius_international/hs.xsl/79_9399_ENG_HTML.htm

[SignWave]

here's a piece

JM,
Heres a piece of "cladding" as Bob calls it. I have had this piece since i was 12 years old. My grandfather brought it home from a ship yard. It is used to join the steel hull (where strength is needed) to the superstructure (where light wieght is prefered).

The process as to how its made, i havent the foggiest. So Ill go with Kaboom!!! It sound exciting enough though not the educated answer I would rather have given.

Enjoy.

[tacmig]

Oh boy here we go..

Melting steel and fabricating things that were useful was the reason I believe I went into welding. The electrical arc and watching steel melt before my eyes was as good as se%! Now imagine blowing crap up! Oh man, someone please approve this process now.

TacMig

[SavageSunJeep]

A few months ago while I was healing from surgery I watched a show about this process( Explosion } welding on the discovery channel, you may be able to contact them and buy the episode and as I remember the process was very successful.

Hope this helps
Wheelchair

I saw that. It has been observed for some time and noted in the military where examples of unlike metal to metal welding takes places in combat situations. Tanks getting hit with with extreme high speed rounds that cause the inside metal to melt and explode in a process called spalling. It was noticed that in testing that welding was taking place. This led to:

They take to plates that want welded together, lay one atop the other and cover it in plastic explosives. Not sure what kind, but it has to be high speed like det-cord.

In spite of it sounding crude it is far from it. It is a very precise process. Too much C4 and the metal no longer is with us, too little and nothing happens.

here is some more info:

http://www.metalwebnews.com/howto/explosive-welding/explosive-welding.html

[Anti-GMAW]

Signwave, that peice is most certainly explosion welded. The tell tale sign is the riple effect in the transition zone. Claded peices of metal are used frequently in the ship building and pressure containment industrys. Explosion welding is generaly done using AN, although other explosive agents such as PETN (most commonly used as the filler in det-cord) or tetrytol (altough rarely, other agents are used). AN is a 90/10% mix of amonium nitrate and fuel oil. They place one peice over the other with a very precise gap and place wooden forms around the top peice. They then place a specific amount of explosive on top of the first peice.
when they detinate the explosive it slams the 2 peices together at such a high velocity that a jet of plasma forms between the two peices. The plasms burns away any impuritys on the surface of the 2 peices as they join together.

[SavageSunJeep]

A few months ago while I was healing from surgery I watched a show about this process( Explosion } welding on the discovery channel, you may be able to contact them and buy the episode and as I remember the process was very successful.

Hope this helps
Wheelchair

Yea, that was very interesting