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Furry Freak
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Not quite sure what you mean - but Nitrogen is used in certain heat treating processes like annealing to provide an inert atmosphere so that casting don't oxidise during treatment. There can be quite a bit of moisture / condensation generated during these cycles.
FF
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I've seen it used for plasma cutters
Furry Freak
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A quick Google gave me this
Wikiepedia:
Nitrogen is used for welding of some stainless steels. It increases the weld penetration and enhances arc stability. It however can cause porosity in carbon steels. Argon-carbon dioxide-nitrogen blends can be used. Pure nitrogen is also used, or can be blended with 10% of hydrogen, depending on application. Blends with nitrogen content are used to weld nitrogen-containing alloys (up to 0.5% nitrogen increases mechanical properties and resistance to pitting corrosion) to prevent loss of nitrogen from the metal.
Wikiepedia:
Nitrogen is used for welding of some stainless steels. It increases the weld penetration and enhances arc stability. It however can cause porosity in carbon steels. Argon-carbon dioxide-nitrogen blends can be used. Pure nitrogen is also used, or can be blended with 10% of hydrogen, depending on application. Blends with nitrogen content are used to weld nitrogen-containing alloys (up to 0.5% nitrogen increases mechanical properties and resistance to pitting corrosion) to prevent loss of nitrogen from the metal.
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..DAZ..
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totally serious FF. I have read it somewhere, I will try to find it again but I came accross it by accident and never bookmarked it. It wasn't used alone though, it was mixed with some other gasses. And in case you are wondering, no I am not about to attach it to my mig, well at least not until my full size bottle of argoshield runs out
. I was just curious as it is an inert gas and there must be more uses for it than pressure testing and purging refrigeration systems.
http://www.mig-welding.co.uk/forum/showthread.php?t=431
and from wikipedia
Nitrogen is used for welding of some stainless steels. It increases the weld penetration and enhances arc stability. It however can cause porosity in carbon steels. Argon-carbon dioxide-nitrogen blends can be used. Pure nitrogen is also used, or can be blended with 10% of hydrogen, depending on application. Blends with nitrogen content are used to weld nitrogen-containing alloys (up to 0.5% nitrogen increases mechanical properties and resistance to pitting corrosion) to prevent loss of nitrogen from the metal.
and last one
http://www.thefabricator.com/Consumables/Consumables_Article.cfm?ID=1024
Sorry, should have done a propper search first, was asking the wrong questions in google, oh and I just noticed your original post has dissapeared
cheers
daz
. I was just curious as it is an inert gas and there must be more uses for it than pressure testing and purging refrigeration systems.http://www.mig-welding.co.uk/forum/showthread.php?t=431
and from wikipedia
Nitrogen is used for welding of some stainless steels. It increases the weld penetration and enhances arc stability. It however can cause porosity in carbon steels. Argon-carbon dioxide-nitrogen blends can be used. Pure nitrogen is also used, or can be blended with 10% of hydrogen, depending on application. Blends with nitrogen content are used to weld nitrogen-containing alloys (up to 0.5% nitrogen increases mechanical properties and resistance to pitting corrosion) to prevent loss of nitrogen from the metal.
and last one
http://www.thefabricator.com/Consumables/Consumables_Article.cfm?ID=1024
Sorry, should have done a propper search first, was asking the wrong questions in google, oh and I just noticed your original post has dissapeared
cheers
daz
Furry Freak
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Well I didn't want to appear rude. This IS a very friendly forum, but I thought that someone with your experience and wisdom would have done as I did and just typed it into Google. There are times when I feel that people simply have not made any attempt to find an answer before posting on forums in general.
Given the wealth of advice that you personally have dispensed, I was just a bit surprised at the question. I don't have the answer, my experience of welding is minuscule compared to the gurus on here but I just typed 'welding with nitrogen' into the search engine and got a reply instantly. Can't vouch for the accuracy - but it wasn't hard to find.
Really didn't mean to cause any offence or suchlike which is why I edited my original post.
FF
Given the wealth of advice that you personally have dispensed, I was just a bit surprised at the question. I don't have the answer, my experience of welding is minuscule compared to the gurus on here but I just typed 'welding with nitrogen' into the search engine and got a reply instantly. Can't vouch for the accuracy - but it wasn't hard to find.
Really didn't mean to cause any offence or suchlike which is why I edited my original post.
FF
..DAZ..
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No offence taken FF, I knew the kind of response I would get and was prepared for it. I did type it inot google but used the wrong search phrases and couldn't find the exact page I was looking for, I should have just spent some more time on google instead of being impatient. But thanks for your time and replies, it is appreciated
cheers
daz
cheers
daz
backpurge
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Just to clear things up
There is only one application where you would use straight nitrogen as the shielding gas and that is when welding a particular bronze alloy (can't remember the exact spec but it is a rare one that has a few marine uses)
Nitogen can be used on it's own for backpurging stainless steel as a cheaper option than argon but better results are achieved when you add between 5 and 10% hydrogen to it which will give you far cleaner penetration beads than you would get with argon.
It's quite common to add a couple of percent nitrogen to argon and use it as a shielding gas for TIG welding Duplex alloys, it is generally a better option than using straight argon and a nitrogen doped filler wire
There is only one application where you would use straight nitrogen as the shielding gas and that is when welding a particular bronze alloy (can't remember the exact spec but it is a rare one that has a few marine uses)
Nitogen can be used on it's own for backpurging stainless steel as a cheaper option than argon but better results are achieved when you add between 5 and 10% hydrogen to it which will give you far cleaner penetration beads than you would get with argon.
It's quite common to add a couple of percent nitrogen to argon and use it as a shielding gas for TIG welding Duplex alloys, it is generally a better option than using straight argon and a nitrogen doped filler wire
