Cut & Etch Weld Testing

For this video we’re going to go intosome element on cutting and etching both carbon steel and aluminum welds let’s doit in a previous video and i will hyperlink it up correct about here I experimented usingthis very identical process for all positions flat horizontal verticaluphill and overhead I failed to get a chance to do a leading edge scan forthat video however the puddle the arc regarded something like this I was seeking to keepthe arc on the main edge of that puddle it seemed like it was once penetratingokay but the one way to be aware of for definite is to experiment it this is only one ofseveral ways that you should utilize for vertical uphill welding I found it workspretty well additionally a sequence of triangles works however what each of them do is theykeep the arc in the front or leading fringe of the puddle so I failed to get achance to do a cut and etch for that distinctive video and that i determined to put awhole bunch more passes on each such a t joints right here so I would also showthe cutting edge on how it’s going to disclose lack of fusion or bloodless lap in betweenpasses so once we do the innovative on this won’t handiest see the penetrationin the foundation of the joint or lack of penetration however will even see all thedifferent passes and the layers and how they stack in there there are severaldifferent methods you should use to cut it is just exceptional to use a process like a bandsaw or a chop noticed or some thing that offers you a fairly delicate surface sothat you don’t have got to do a whole lot of grinding this dry cut saw leaves afairly smooth floor so i am going right to the belt sander with a 50 grit beltthat will provide me a quality tender conclude first-class flat finish now not fairly soft enoughto get element within the etch so i’m gonna go ahead and go to a 120 grit and i’mgonna crisscross the scratches so that i’m going to understand when I obtained the 50 gritscratches out of there you can already style of become aware of you will discover a little bitof element already on the place the weld begins and where it ends but i am gonnago forward and take it down a little bit bit smoother commencing off with a brownscotch brite then stepping it down to a purple scotch brite pad after which a gray oneand that must be about sufficient for etching i will be making use of thispassivation solution made through a manufacturer referred to as chem clean. An extra simpler to getsolution is just naval jelly rust remover andI’ll show that in only some minutes but you will find how this quite reallyreveals each weld nugget and the way much penetration I bought and in addition even eachlayer of weld and whether or not I acquired ample fusion in between layers or whether or not Igot cold lap then I take a picture and i pull it into some kind of editingprogram and snap strains on it so i will be able to tell where the foundation of the joint is youdon’t need any tremendous specified modifying application to do this you would pull thisimage into something like Microsoft Paint even it could it will draw lineslike this I did an overhead multipass t-joint no longer too lengthy in the past and just wantto exhibit you this is a quite tough finish nevertheless it’s still etched just finebest observe though is to get it just as soft or as virtually a mirror finishas that you could with the gear that you have you can see extra detail should you get afine conclude primarily if you’re going to be using this Loctite naval jellyrust remover it works simply satisfactory it takes a bit bit more swabbing to bring outthe detail nevertheless it does the job it is easy to get at any tremendous-field store and it alsohelps to as soon as you are finished with the etch to kind of play a gentle source atdifferent angles round it you’ll see extra detail let’s take a seem ataluminum now aluminum is particularly convenient to cut and fairly easy to etch some timeago I used to be trying out out special waveforms on aluminum what you see hereis known as developed pulse also referred to as mixed TIG the place it can be alternating betweenAC and DC en i’ve examine all varieties of claims on how a lot penetration it gotI desired to look for myself so I compared it towards all of the different wave types liketriangle wave smooth rectangular developed square whatnot I reduce this simply using ahand grinder and a reducing disc and then I polished it identical to ordinary taking itall the best way down to a blue or grey scotch-brite disc i labeled them so Iwouldn’t mix them up and you will find that the the most important wave types liketriangle gentle square advanced rectangular we’re all very very identical but when Igot to that advanced TIG the place it was once alternating between AC and DC en what adifference so I received to scan it and spot for myselfthe change in penetration rather of taking somebody’s phrase for it so then Ialso welded this quarter-inch lap joint by hand and that way I would get an ideaof what it will do with filler steel delivered and again verified it received someresults in a matter of minutes I thought i’d weld a different quarter inch lapjoint utilising a 200 amp inverter laptop full pedal 200 amps quarter inch I’musing a significant 1/8 filler steel and to me it looks like it’s no longer quite getting inthere like there is most likely somewhat little bit of a void on there in the root ofthat joint i’m kind of packing filler steel in there I understand it’s no longer as sizzling asI would adore it however for the needs of just correlating the puddle and the arcshot to the specific move part I thought it will be fascinating so I cutit with that same dry reduce noticed I went correct to a hundred and twenty grit correct to the crimson wheelfollowed through the blue wheel or grey wheel after which i’m gonna utilizing straight-upEasy Off oven cleaner for the etchant here and it really works simply first-class for aluminumdoesn’t take very long both I’ve received a quite good polish on this now I bought aresult and no longer most effective do i have a bit of bit of straight-line effect towards theroot of the joint but I obtained a little bit bloodless lap out by way of the toe right here once more Isnapped some traces once I pulled the snapshot in to see exactly the place the rootof the joint is I bought some penetration right here and there however no longer what i’d wantto see now this i do know just isn’t going to be just right so i am doing this on purposeI dropped the amps by using 50 slamming some big 1/eight rod in there and you will find I’mtunneling i’m getting lack of fusion at the root of the joint however we’re gonnasee exactly how so much cuz you simply saw that now you’re going to get to see thecross-section right here immediately no surprise thereI knew there used to be going to be some lack of fusion and didn’t be aware of i might haveas much porosity as we see there however this is why we scan get quite a bit ofinformation and one test is valued at a hundred opinions you

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