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Discussion in 'The Lounge' started by rdn2blazer, Jun 24, 2006.
I had to work today, so I took a few pics in the plasma spray shop.
one more. it hurt my eyes to look at this as close as I was. its bright.
I don't understand what I'm looking at. Please take a minute and describe the pics for me, please. You'll have to excuse my ignorance, but keep in mind I'm a simple ditchdigger.........
your a stylin pimpin ditchdigger in the big red mickey wagon..
I weld with (true) spray arc... the metal literally becomes molten and "sprays" onto the base metal welding it together...the lincoln powermig has several settings for it.. it produces a very "smooth" weld.. requires a different gas mix than 75/25... I use 84 /15/1 ar/co2/O.... sounds like a weedwhacker when youre welding
and I cut with plasma arc,,
but rdn2blaze is going to fill us in as to what plasma spray is
I work around welders everyday, but all I ever see is straight-on pipeline arc welding, with a little bit of structural work every so often. Generally I'm too busy to worry about what the welders are doing.....
coatings are applied through a flame spray process using several types of gasses like hydrogen, oxy accetaline, argon, and nitrogen. there is an arc that starts the flame then depending on the process there is either a type of wire of powdered metal introduced into the flame spray.
the gasses and powdered metals or wire are fed into the "gun", the flame reaches volocities in the range of mach 2 to mach 4. the flame heat coming out the end of the gun can be controlled to better promote the melting of the introduced metals. we can reach a flame temp of 30,000 degF if necessary. most coating are good at a temp of about 5000 deg F. even with that kind of heat we can maintain a parts surface temp to about 300 degs F. with a fast traverse movement of the gun and high pressure air jets blasting at the part while being sprayed.
coatings like hard crome were the industry standard for many years. but with coating development in the last 20 or even 30 years "plasma coatings" are and have been taking over for being concidered the "industry standard". hard crome is much softer then several of our coatings and is poorous, which allows corrosion of the base material over time. carbide coatings are so dence and hard they virtually eliminate corrosion, and have 3 to 10 times or more the wear resistant cabilities. I could go on and on about coatings but I will stop here.
Umm why stop? I actually leaned in closer to the screen so it'd be easier and faster to read. I to am like Paul and have never heard of what you were doing and or will be doing come your next day of work.
I <3 spray-transfer
that second pic looks comfortable!
that pic is just perspective. he is about 8 ft away from the flame. I dont want to think about what would happen if the flame hit any part of a human body with a flame heat of 5000 deg and a volicity of several thousand miles an hour . the sprayer is changing the part, the robot is programed to move to the upper corner of the catch booth.
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