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how yall doing, this is a open v grove weld coupon done in the vertical position downhill with MIG. The pictures shown are the root and cover passes I feel I did pretty good knowing it only took me a day to learn. Give me some feedback. Attached Images
Reply:It's ok I guess. Next time I see you in school I'll show you how it's really done.I'm just kidding. It looks good.
Reply:Looks good. Settings?DavidReal world weldin. When I grow up I want to be a tig weldor.
Reply:Ive never mig'd plate, but is that a crack going down your root. It may just be a glare but just wondering.As said by CHENRY:you cant weld on a thingamajig like that. are you even certified to do thingamajig welding ? I once saw an improperly welded thingamajig fail and eleventy twelvoteen things got ballywhacked. I dont think i would risk it.
Reply:Looks like it to me also..It's on the backside too..Thats not good.....zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Vertical down V grove mig is not good. Extremely prone to cold lap. --Gol'
Reply:That 'crack' just looks like the edge of the one bead that is over the other bed to me. ???The one on the top does anyway. The 'crack on the bottom looks like a crack on the bottom.
Reply:looks like a crack to me too.The Welder Shop has great deals and reviews on Hobart, Miller and Lincoln Welders.
Reply:Originally Posted by Go1lumVertical down V grove mig is not good. Extremely prone to cold lap.
Reply:the crack is actually a stop and restart but yea its there could of did better.
Reply:looks good for down hill but for a test like that youd have to backgrind the root then then a bead on the back after you get it down to sound metal. but it looks good like everyone else has said.now try up hill and you get the weld on the back which IS good in some circumstances-Justin6G zirconium 702 GTAW 2" xxheavy6G P.E.D. carbon steel GTAW 2" xxheavy3G titanium Gr. 2 - Gr. 7 GTAW up to 3/4" 3G 316L stainless GTAW up to 1" 3G carbon steel GTAW up to 1" 3G Hastalloy GTAW up to 3/4"1G tantalum GTAW up to .060"
Reply:Hey, you'll get there...a day of practice is just an introduction...keep at it and keep posting. Showing your progress will be helpful to others that aren't doing as well as you are...Smithboy...if it ain't broke, you ain't tryin'.
Reply:Weld it uphill. You can do it, it just takes practice. Heck, a monkey could do it if he wanted to.
Reply:thanks bro
Reply:I just took my verticle up open root mig test a couple weeks ago. got a little more penetration and build up on the back side. but it looks good, mybe a little hotter to get more melt through. just my 2 cents.
Reply:I personally don't think it's a crack he just has underfill right down the center of the root. I've had that same look before an a vertical down v grove with MIG. I would like to see a radiograph of that weld i can almost garantee there is porosity in it. Maybe a good ole set of wagon tracks. Thats the bad thing about a radiograph though it won't show if there is cold lap. As others have said Vertical up is the way to go for stuctural welds. I've welded several certs with 18V 185WFS through all three passes going up. Never had one fail yet. I run one pass right after another --Gol' |
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