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originally posted by: skunkape23
a reply to: Grovit
I've worked many years in metal fabrication.
Do you have any specific questions?
originally posted by: skunkape23
One of the more complex tasks that I have performed on a regular basis involved welding hastelloy nozzles to stainless stems.
Not many people know how to do it without cracking the hastelloy.
It has to be slowly preheated to a certain temperature and then packed in insulation to allow the weld to cool slowly.
It is an expensive mistake if everything isn't done just right.
originally posted by: skunkape23
You want to have fun with metallurgy? Get a hold of a magnesium engine block from an old VW and throw it on a bonfire. Tell everyone to stand back.
originally posted by: skunkape23
One of the more complex tasks that I have performed on a regular basis involved welding hastelloy nozzles to stainless stems.
Not many people know how to do it without cracking the hastelloy.
It has to be slowly preheated to a certain temperature and then packed in insulation to allow the weld to cool slowly.
sounds like a a similar process we used....chills were placed in the mold so after the iron was poured it would cool evenly....if not you get diffusions
It is an expensive mistake if everything isn't done just right.
originally posted by: Grovit
originally posted by: skunkape23
what applications are the parts you weld used for?
what material do you use as insulation to let it cool slowly...
It's diffusure nozzles for atomizing crude. It goes through the nozzles at high temperature and pressure, atomizes, and then drops through a "cracker." That's basically a vessel with an aroesolized catalyst that separates the various components of the crude.
The preheated, welded parts are then packed in a box with kaowool. I'm giving away trade secrets here.
originally posted by: skunkape23
You want to have fun with metallurgy? Get a hold of a magnesium engine block from an old VW and throw it on a bonfire. Tell everyone to stand back.