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Today I welded 1/2" plate fillet welds with .045 wire. To spray weld, the chart said to use 100% CO2, but I only had stargon. Why do certain gases allow spray welding?
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chasin' the $ -
I dont believe you can spray weld with 100% CO2. Normally it takes a high content of Argon to get into a spray. The Argon alows the puddle to get more fluid so you can get the weld into a spray. 100% CO2 is for short arc welding. Lets see What others have to say.
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Dave Evans -
as far as i know, dave has it right. argon is the only shielding gas that allows true spray tranfer welding. it has to do with it's ionization potential[which is a function of the arc voltage] and how tightly it constricts the arc column. you can mix other gases with argon and still spray but it takes more power. i believe i recall seeing graphs with the ratios and voltages for spray transfer but i can't put my hands on one at the moment.chipComment
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Two mixes that work great for spray are 98 % AR and 2% Oxygen, and 98 % AR 2 % CO2 . Most guys like the oxy mix best, however I have used the argon CO2 mix quite extensively, and it works for me. Do a search here on "spray" , and you will find some neat pictures on a job I did a few months ago.Comment
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spray sound
What does spray transfer welding sound like comapred to globular transfer? There are many sounds associated with MIG welding compared to other processes.chasin' the $Comment
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Re: spray sound
Short arc = crackle, globular = ploop, ploop, spray = hisssOriginally posted by mikeb
What does spray transfer welding sound like comapred to globular transfer? There are many sounds associated with MIG welding compared to other processes.Comment
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