Welded stainless steel to steel...

[Dynamics]

I welded (with three tacks) stainless steel nuts to steel plates. Then (Again with three tacks) welded a length of Stainless steel threaded bar into the nut.

Shielding gas was Argon/CO2 95%/5%.

Again, I would value your comments.

Brian.

 

[Lawnmowerboy]

Bit cold. and a bit undercut on the thread but hard to help.

 

[Dynamics]

By cold, do you mean I didn't hold the tack for long enough? How can you tell this?

By undercut, do you mean I have melted too much of the threaded rod away?

Thanks for your help mate.

 

[gordon stephenson]

If possible it would have been better to drill through the plate, then weld on the nuts as you did do. then weld through the hole onto the end of the screwed rod,

 

[Norm]

Hi, just curious as to what they are to be used for ?

 

[Dynamics]

If possible it would have been better to drill through the plate, then weld on the nuts as you did do. then weld through the hole onto the end of the screwed rod,

Hi.

No not possible, I did not want to drill plate.

 

[Dynamics]

Hi, just curious as to what they are to be used for ?

Air pistol targets. Crack... Ting.

Update... These have now been used, and were great. Stood up to pellets hitting them at over 300 feet per second, and made a nice solid "Ting"

We even tried bending the bar, and no cracks around welds.

Brian.

 

[Norm]

Air pistol targets. Crack... Ting.

Update... These have now been used, and were great. Stood up to pellets hitting them at over 300 feet per second, and made a nice solid "Ting"

We even tried bending the bar, and no cracks around welds.

Brian.

Nice one, you made them and they were fit for purpose, job done

 

[zardoz]

Air pistol targets. Crack... Ting.

That made me smile. 'Crack.. Ting', along with the noise of diesel generators are the sounds of the old funfair to me

 

[Lawnmowerboy]

It is hard to balance getting enough heat in and melting away the threaded bar where it joins the weld. You can control the undercutting by changing where you are feeding the wire in. If you bias it to the plate enough heat will wash up the bolt and melt it in enough. Basicaly what I meant before is not enough heat into the plate and too much on the bolt. Obviously work well though!! =)

 

[Dynamics]

It is hard to balance getting enough heat in and melting away the threaded bar where it joins the weld. You can control the undercutting by changing where you are feeding the wire in. If you bias it to the plate enough heat will wash up the bolt and melt it in enough. Basicaly what I meant before is not enough heat into the plate and too much on the bolt. Obviously work well though!! =)

Great. well explained.

Wire tension, roller tension, Power, wire speed, gas flow, tack, fillet, seam, spot, plug, stick out, tip dip, travel speed, gun angle, push/pull, undercut, too hot, too cold, and probably lots of other things I have yet to learn. Great fun though.

Thanks, Brian.

 

[the snooper]

the bolt will look undercut there is no way you will not destroy the thread straight away

 

[Dynamics]

the bolt will look undercut there is no way you will not destroy the thread straight away

I see. because with the thread, you have about half the material of the solid part of the bar.

 

[the snooper]

yes and its in very small thin sections