can we see any issues with this

[davidjohnperry]

last weld of the day and it felt off like it was to hot I was in the wps spec of 30 volts 285 amps travel speed was a little slower then reg but its a 6 flw on 12 mm box and 10 mm plate. Dropping the voltage gives me shed loads of spatter and turning up the wire speed does the same

 

[WorkshopChris]

When you zoom in it almost looks like lots of contamination has floated to the top and cooled in hard lumps. Did this steel have a very heavy mill scale on the surface?

 

[davidjohnperry]

the plate did its before clean up

 

[windingroads]

Not much wrong if anything with the welds, I expect contamination of sorts, the box section does not look that clean,
I see marks where you cleaned it, but it could just be something was still in the steel, you
get an odd batch that makes you question what you are doing, steel does come in form the
suppliers that is not what it should be, I've seen sheet steel that almost busted a guillotine
because it was so brittle, seen angle iron that would always break away from the weld, this
was on jobs that used the same material and technique every day.

Depending on how critical the welds are, you could give it some more, or add some gusset
pieces to strengthen things up, if it is under compression, then it will be fine without any
further work.

Did you change the cylinder of mig gas before you did that weld, I have come across changes
in weld quality where nothing else was changed other than the empty cylinder being replaced
with another the same.

Some mig wire also has the ability to clean and and thus deal with not so clean metal where others don't.

Regards, john

 

[davidjohnperry]

this job is fabricated as per drawing I think its a colum for something but are gas is from a huge tank the metal was pretty thick in scale but we are on hrs so only get x amount of cleaning x amount of time for fab x amount of time for welding to be fair the next set I've doing I'm way behind on as I lost a bit of motivation at 3:30 today just been wacking end plates on today got some fun work tomorrow afternoon with dad

 

[Jim Davey]

Those little islands are silicon. Usually a sign of overheated or poor quality wire. If you are on 1.0mm a jump to 1.2mm can cure the overheating issue. Will allow you to motor on a bit faster too.

 

[davidjohnperry]

the wire we use is good but the last batch we had was so poor wire was wound to tight keeps sticking to the reels or the gun so it could be we need a new supplier

 

[Jim Davey]

Try West Country, they are in Brizzle

 

[Jim Davey]

You want to try 1.2 though.

 

[davidjohnperry]

this is work mate all has to come in from stores but I will pick up a real for my welder at home

 

[Richard.]

Silicon islands.
Natural part of the process with solid wires and won't effect the integrity of the weld at all. Some are worse than others but all will produce some.
Metal cored wires are a lot better as are dual shielded flux cores.
Don't worry about them. They only a pose a problem if the part is to be painted.

 

[davidjohnperry]

we have to clean up after I think it was before cleaning