questions about dual shield fux core

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first what I'm working with :Machine : Lincoln 350 MP Power MigWire : Washington Alloy Co. , 71TM 0.045 dia.Gas : 90/10I've been trying to weld a vertical up T-plate, Z weave and the problem I'm having is tying in the toes on the sides....it looks like a big fat caterpillar laying up there. sorry I don't have a way to post pics.settings I have tried : 275 WFS,24 volts...300WFS,18 volts...350 WFS  both 22&25 volts.any advice on settings and vertical up would be greatly appreciatedT.J.
Reply:Is it this stuff?Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:yes I think it is. I just wrote down what was on the end of the box. going by that chart where would a good starting point be in vertical up?thanks for posting that chartT.J.
Reply:What settings are you successfully running in the flat/horizontal position on a t joint?Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:to tell the truth I have not done the T Joint in the flat and horizontal. I have been padding beads in flat & horizontal with all the settings previously mentioned and they look fine. I was given the advice to try vertical with a T Joint instead of trying it on a flat plate.what I am trying to work up to is a 1/2" plate V groove with a backing plate.would I be better off concentrating on that instead of pulling my hair out working on a T plate?
Reply:Easy version of the joint first - then small changes as needed for vertical - in my opinion.Only change one thing at a time, never WFS and voltage together.Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:For vertical i used 280WFS 22.5V but with C25 gas with the same machine.
Reply:Dave,thanks for all the advice & help. so, since what I'm trying to accomplish is a v-groove I need to start there in all positions and not worry about a t-plate.with all the trouble I'm having in vertical I'm really dreading overhead
Reply:27 volts 300 wire. no need to weave.
Reply:how different is the 75/25 vs. 90/10.the 90/10 is what I have access to
Reply:we wont even talk about what my welds looked like when I didn't weave......lets just say some of my welds makes a few on the welding fail thread look good
Reply:I just cut up and passed a 2G macro and fillet break test on 1/2" plate the other day at 26.0V, 335 w/s, 100% CO2. No manipulation just a straight drag with slight angle. It produced a fillet just shy of 3/8" with a flat face and almost no spatter. If I tried for the full 3/8" fillet the weld started to sag. Passed the 3G fillet test at 24.0V, 275 w/s, 100% CO2. Used a slight weave to produce a 3/8" fillet. Dual shield seems to be kind of picky with the wire speed. I kind of set mine up in globular transfer?, it wasn't quite spray transfer but it was close.In my experience there are two common problems with the weld sagging in the center. First problem is not holding the toes long enough, you really have to hold for a long time to fill the side and also give the other side and center a chance to cool just a touch before going back. You want to be getting back to the weld just as it is starting to solidify but before it actually becomes a solid. The second problem is not having the machine set high enough. You go over the center of the weld twice as many times as you touch the toes. If you don't have the welder set high enough to bite at the toes then all of then heat tends to collect in the throat of the weld and sag. It's also important to build a "shelf" at the start of the weld. My students tend to get in a big hurry at the start of the weld, especially vertical up. If you keep the upward movement a little bit slower at the start it gives the weld a chance to properly form and a place for the rest of the weld to sit. It's a little funny to look at the first time but once you get it going you can really focus on bringing the arc to the root of the weld without worrying about it rolling out.
Reply:T-JWhat gases are the 90/10.Opus
Reply:argon/co2thanks everyone for all the help & advice. I really appreciate itT.J.
Reply:Hello T.J., I'm a little late to get onto this, however, the "majority" of flux-cored gas-shielded wires will either run with 100% Co2 or 75% Ar/25% Co2. There was a wire that ESAB produced that was designed to be run with 90% Ar/10% Co2 as well, however I believe that it was the only one and the wire/flux combination was specifically formulated to use this mixture of shielding gas. Whatever wire you are using, check the label carefully, if it only has a -1C in the AWS wire designation numbering sequence then it is designed for use with only Co2, if it has both a -1C and a -1M then it is designed to be run with either the straight Co2 or the 75/25 mixed gas, if it has only the -1M designation then it is designed to be used solely with the 75/25 mixed gas. There are these 3 types of designations present as well as the 90/10 type.Running a flux-cored, gas-shielded wire with the higher argon content gas than recommended will prevent proper wetting out of the weld toes and can also cause a "hard" weld deposit that may be prone to cracking. Additionally, gas-shielded, flux-cored wires are designed to have a certain "loss/burn-out" of alloying elements and reactive elements based on exposure to the atmosphere around the welding arc while in the presence of a specific shielding gase. Using shielding gases other than those that the wire is designed for will upset this intended action/reaction and can also lead to the welding challenges that you have experienced. Hope this has helped a bit to explain some of your welding challenges. Good luck and best regards, Allanaevald
Reply:According to what MinnesotaDave posted for the wire, it's designed for 100% Co2 or 75Ar/25Co2. It also says other mixes may be used if tested for application. Running the 90/10 might just be too  hot and fluid for vertical.
Reply:We always run 75/25 gas with .045 duel shield wire.JasonLincoln Idealarc 250 stick/tigThermal Dynamics Cutmaster 52Miller Bobcat 250Torchmate CNC tableThermal Arc Hefty 2Ironworkers Local 720
Reply:Originally Posted by Welder DaveRunning the 90/10 might just be too  hot and fluid for vertical.
Reply:Originally Posted by snoeproeWe always run 75/25 gas with .045 duel shield wire.
Reply:Again thanks to everyone for all the help.the label on the wire said 71TM    Heat No.-11M1305534   I am stuck with the 90/10 mix. I asked why that mix was used instead of 75/25 and it was said 80/20 was the minimum for some process according to AWS  don't remember exactly also, there is some ESAB flux core wire in the tool room but it is 0.052. I'll get the info off the label and post it......it will be next Tuesday before I can post the info on itI really appreciate the help
Reply:Hello T.J., here is a link to the ESAB consumables covering some of the gas-shielded flux-cored wires that they have available, you will notice that they have one that is called: "Dual Shield 70 Ultra Plus" this is their wire that is designed to be used with 90/10 shielding gas and other mixes. Check this out. Best regards, Allanhttp://www.esabna.com/us/en/products...egory&catId=56aevald
Reply:Originally Posted by T.J.Again thanks to everyone for all the help.the label on the wire said 71TM    Heat No.-11M1305534   I am stuck with the 90/10 mix. I asked why that mix was used instead of 75/25 and it was said 80/20 was the minimum for some process according to AWS  don't remember exactly
Reply:have you ever tried a 3g 7018 test?just asking cause i tried dual-shield first and just failed miserably. no matter what my boss told me to do, i could not get that stuff to run up-hill. keep practicing, and dont short-cut on machine settings. there was some magic that happened to me after i learned to stick-weld that helped with my wire, might be worth looking into.bosses stuff:trailblazer 325maxstar 200my stuff:sa 200fronius transpocket 180100 amp Lincoln w/f97 f350 DITKevin
Reply:I think your employer is confusing shielding gas for spray arc with solid wire and shielding gas for flux-core. I think flux-core is either globular transfer or spray transfer no matter what so use the recommended shielding gas if it's not welding properly.
Reply:Welder Dave & Silicon-based, yep they are using it for spray mig.92dlxman, yes and no on the test. I have practiced 1/8 7018 3G but, I have not took the test.Update:The ESAB wire is Dual Shied II Ultra. thanks to aevald's link I looked it up & that wire is used with 100% CO2.The good news is next Monday we will have a couple of tanks of CO2. So, I get to try out the ESAB 0.052 wire & if I understand the Washington Alloy 0.045 specs it can be run on 75/25 or 100% CO2.Again, thanks to everyone for all the help & I will keep y'all updated.