Posted: 1/9/2013 4:20:50 PM EDT
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Wow, this is really really cool stuff.
http://en.wikipedia.org/wiki/Explosion_welding |
I never knew such a thing existed! 
https://www.youtube.com/watch?v=HvJee_1w4tA |
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I would have to think they'd end up with a lot of impurities and air pockets doing that... I guess not. |
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On the way home today I saw a guy rolling down the interstate with the most ghetto looking open trailer behind his truck. On this trailer, with no side boards or anything, was a Miller welder/generator, a propane tank that did not appear to be strapped down, plus oxygen and acetylene tanks (loosely chained to the miller) with regulators attached an no caps in sight.
For a brief moment after reading the thread title I thought the owner of this setup was a member and had decided to hawk his business on arfcom 
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Used a LOT in the heat transfer industry. For tube and shell heat exchangers made from exotic materials on one side, tube sheets are usually made from it. Say titanium is needed for corrosion resistance, getting a tube sheet 2" thick needed for pressure would be hideously expensive to make. Now make it from steel with a 3/16" titanium explosively bonded layer and it is much easier to afford. I've used a good bit of it. Takes a while to deliver once ordered. But saves big bucks. |
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Quoted:
Used a LOT in the heat transfer industry. For tube and shell heat exchangers made from exotic materials on one side, tube sheets are usually made from it. Say titanium is needed for corrosion resistance, getting a tube sheet 2" thick needed for pressure would be hideously expensive to make. Now make it from steel with a 3/16" titanium explosively bonded layer and it is much easier to afford. I've used a good bit of it. Takes a while to deliver once ordered. But saves big bucks. How do you weld a seam with it? Titanium welding on inside, Steel welding on the outside? Gap? |
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Quoted: Exactly. The tubes are usually rolled into the sheet., then tubes are welded to the titanium cladding. Most of the time, the tube side closure uses a gasketed joint. The other parts of the tube side wetted pressure boundary can be made with generous corrosion allowance. But tubes must be thin for heat transfer, titanium is highly resistant to corrosion.Quoted: Used a LOT in the heat transfer industry. For tube and shell heat exchangers made from exotic materials on one side, tube sheets are usually made from it. Say titanium is needed for corrosion resistance, getting a tube sheet 2" thick needed for pressure would be hideously expensive to make. Now make it from steel with a 3/16" titanium explosively bonded layer and it is much easier to afford. I've used a good bit of it. Takes a while to deliver once ordered. But saves big bucks. How do you weld a seam with it? Titanium welding on inside, Steel welding on the outside? Gap? |
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This is a very cool technology but it's pretty much old school to be honest. I think TI has patents for this sort of process dating back to the 1950's for production of bimetallic discs for temperature switches.
If this is something newer I'm happy to be schooled. |
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I'm sure they have refined it but we've been using plates made that way for at least 25 years in high wear applications in material handling. Like big chutes for loading/unloading material at a dock off a ship etc...We just did one last month. The only issue we have had is getting some of it to roll well for use in round duct like applications. |
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http://www.useltonarmsinc.com/New_Lightweight_1911_Pistol_-_Explosively_Bonded_Metals/ Explosively bonded 1911. |