Crack repair, cutting edge of bucket

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Hey guys.... it's been a while since I've really posted anything, but I haven't been doing anything that I felt was worth posting. Process,  MIG, spray transferwire .045 E70S-6Gas  90/10 ARG/Co2OVC 32wire speed..... CRANKING.... (I forget)So I have a crack to repair in the cutting edge of an excavator bucket...This is the same crack just a top and bottom pic, as you can see the crack is 100% through the plate. The plate is 1.5" thickSo firts I use the carbon arc to gouge out the crack and prep a v type joint. I'm only going to gouge about 1/3 of the depth of the plate because I will be gouging the back of the plate as well and when I do I will be gouging into the weld I put in repairing the top of the plate. This will ensure I get 100 + % penetration.Gouged and prepedWelded....... this is just the cover pass I didn't take shots of the pass to this point.Crack (bottom) gouged out and prepedSome of the passesI have one more pic to post......_________________Chris
Reply:Check out how flat this bead is..... this is the same bead that is in the last pic from the post above I left the penny there.Thanks for looking _________________Chris
Reply:I see....Another highly paid employee.. Nice work.. ...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:Nice job.DavidWeldaholic
Reply:Great work Chris - that is some amazing MIG work on some BIG material. It almost looks like the customer could use a new blade...but it's probably just another cheap skate customer, right?John -  fabricator extraordinaire, car nut!-  bleeding Miller blue! http://www.weldfabzone.com
Reply:That is some awsome weave with the welder. looks perfect.Hope your employer knows your worth.Miller DVI2Lincoln Precision Tig 225Thermodynamics Cutmaster 38Everything else needed.
Reply:Originally Posted by MicroZoneGreat work Chris - that is some amazing MIG work on some BIG material. It almost looks like the customer could use a new blade...but it's probably just another cheap skate customer, right?
Reply:great job.... buckets are great.
Reply:Really beatiful work!What do you think is causing this cracking?  Does it all appear to be associated to what looks like hard facing beads on the bucket, or welds attaching the teeth?Would be nice to figure out the root cause of the problem so it could be avoided in the future.
Reply:That's what happens.  When you start repairing the heat make other stress cracks noticable.  At the site with the mud and dirt they would have only seen the obvious, or when it fails.Nice work.Here in the Great White NorthMosquitoes can't fly at 40 below
Reply:Wow, the bucket may be toast, but at least that bead looks good. Could you explain a little more about carbon arc gouging, what's it take to do it, ect?
Reply:Wow Chris...great work as always.VERY nice welding!! - Paulhttp://all-a-cart.comWelding Cart Kits and accessories
Reply:Originally Posted by pulserReally beatiful work!What do you think is causing this cracking?  Does it all appear to be associated to what looks like hard facing beads on the bucket, or welds attaching the teeth?Would be nice to figure out the root cause of the problem so it could be avoided in the future.
Reply:Originally Posted by maxyedorWow, the bucket may be toast, but at least that bead looks good. Could you explain a little more about carbon arc gouging, what's it take to do it, ect?
Reply:Originally Posted by lorenzoThis is the best way I can give you info on carbon arc gouging..... and it saves me A LOT of typing.
Reply:Originally Posted by maxyedorI always see it mentioned in product specs but never understood it. That explained it really well, thanks. Looks like another cool thing I have minimal to no use for, but I can see how handy it could be for the right aplication.
Reply:Before welding on the lip of a bucket like that you should pre heat the lip to 300 degrees and dont the the temp of the lip get over 500-550 degrees. Use temps sicks or a temp gun to check the temp after every pass.  If it gets hot, cover it up with a fire blanket and let it cool down a little (slowly). Plus welding with a really wide weave pass puts alot of heat into the steel not to mention alot of areas for slag to get trapped in. Although I must admit it was a pretty looking weave.
Reply:Originally Posted by dds78910Before welding on the lip of a bucket like that you should pre heat the lip to 300 degrees and dont the the temp of the lip get over 500-550 degrees. Use temps sicks or a temp gun to check the temp after every pass.  If it gets hot, cover it up with a fire blanket and let it cool down a little (slowly). Plus welding with a really wide weave pass puts alot of heat into the steel not to mention alot of areas for slag to get trapped in. Although I must admit it was a pretty looking weave.
Reply:If you don't have a smooth transition along the adapter weld edges it will create stress raisers and this is how some of the cracks show up as well as lorenzo pointing out operator error!
Reply:Nice welds.  I always liked fixing backhoe buckets at my old job.DewayneDixieland WeldingMM350PLincoln 100Some torchesOther misc. tools
Reply:Very nice. I'm still limited to stick welding out of the shop. Been thinking of a suitcase welder. Is that what you use? I just finished a snow bucket that goes on a case 921 (too big for the bucket). They broke the quick attach bracket (1" plate). I took pics but haven't figured out how to post them yet. I'll try tonight.Man invented metal, he can do whatever he wants with it.KMAC
Reply:Originally Posted by KMACVery nice. I'm still limited to stick welding out of the shop. Been thinking of a suitcase welder. Is that what you use? I just finished a snow bucket that goes on a case 921 (too big for the bucket). They broke the quick attach bracket (1" plate). I took pics but haven't figured out how to post them yet. I'll try tonight.
Reply:Man, that is an extremely flat weld.  Very slick.  I passed a spray arc test for Komatsu (sp?).  There's a plant close by.  I couldn't get it that slick though.  I'm wondering why you chose spray arc mig instead of FCAW.  I know that spray arc is extremely hot, and out at Komatsu they pulse it about every 10 seconds or so.  No body at work likes to use mig a whole lot.  The only thing it's used on mostly is our automatic roll welders (affectionatly called Jimmy Jammers).  Other that that, it's flux cored if you're wire feeding.  And, what is a bore welder?  I'm assuming it's used to build the ID of something, but we do that by hand.  Is there a machine to do that?
Reply:Does the texas weave or stitch with the mig, awsome.  Thanks for sharing lorenzo.  Yep, got your tune, sounds great man.  Awsome work.Various GrindersVictor Journeyman torch200cf Acet. 250cf oxygenLincoln 175 plus/alpha2 gunLincoln v205t tigLincoln 350mpEsab 650 plasmaWhen you can get up in the morning, Its a good day.Live each day like its your last.
Reply:Bigcountry, the only other wire I would use for this type of repair work is a dual shield wire for a repair that I can make in the shop. As far as using a spray transfer..... application, deposition rate, penetration, speed of the repair these things all factor in to the process I choose.A bore welder is machine that automatically welds the the ID of a bore. It can also weld the OD of a shaft and things of that nature.Here is a pic of the machine welding the end of an excavator stickThis is the weld......... not too shabby huh?Here is a link to the thread I posted with this repairhttp://www.weldingweb.com/vbb/showthread.php?t=8415_________________ChrisI like your back gouge... deep and wide !
Reply:Man lorenzo, that is an absolute picture of perfection.  I love gadgets.  Especially ones that make life easier as well as make money