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WELD HARDENING
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Tad Wicks View Drop Down
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Joined: 27 Mar 2011
Location: Shandon, CA
Points: 2165 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tad Wicks Quote  Post ReplyReply Direct Link To This Post Topic: WELD HARDENING
    Posted: 02 Jun 2021 at 3:01pm
I do a considerable amount of salvaging older or no longer available parts and pieces and one problem that I have yet to solve completely is weld hardening of the base pass buildup on cast and forged steels. I have tried numerous rods, wires, pre-heat and cool down to try and alleviate the hard spots but they still show up and eat carbide like beavers eat trees during the machining processes. A friend of mine worked in construction and said any time the line boring guys showed up that they would do a base pass of 7014 before anything else, I haven't tried that yet but thought that I would give it a try with DC- to try and not disturb the bass material any more than necessary. Anybody have any tricks or tips?  Thanks
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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
Location: Afton MN
Points: 41614 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jun 2021 at 5:44pm
On cast I have used Allstate #8 rod , or in some cases a 304 SS rod - then depending if a BUILD UP is needed following with a 7018 rod as filler or using E 70s wire feed  
 On cast a pre heat is needed but I have also used brass with oxy/acc for joining but then no metal rod beyond . 
 I had bought 3 axles for HD4 that had been welded up at seal location then machined but found the welding and machining destroyed the integrity of hardening and relieving and of stress and axles broke and a crystalline feature of axle showed - so I uses speedy sleeve to correct wear on used axles with no more breakage . 
 Problem on cast can be the carbon deposits which come from base and then contaminate any machining done . 
 Son has noticed new steel he has been purchasing is heavy with carbon deposits and is heck on saw teeth when cutting - doesn't seems to effect fabrication welding but sure is something if any machine work is needed on the raw steel before welding .   
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 81384 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jun 2021 at 6:16pm
i weld everything i do with 7018 on DC... Never used the 7014 rod, but it is suppose to be a FAST FREEZE meaning it does not burn in as much as 7018, more sets on the surface and cools faster... Maybe that is the plan in not drawing in the carbon.. I dont know.. I do know the 7018 does draw, but i dont " machine" much after welding... more justs buildup and  repair broken... My machining is normally a grinder.
Like them all, but love the "B"s.
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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
Location: Afton MN
Points: 41614 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2021 at 7:05am
I always figured 7014 or 7024 as a drag rod for flat welding or filler rod - I welded the grouser bars on my HD5 track with it as well as grousers on D5 track I installed on my D6 -9U . 
  https://youtu.be/vlwmE0Naxkg

Edited by Coke-in-MN - 03 Jun 2021 at 7:06am
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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ac-mike View Drop Down
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Joined: 14 Sep 2009
Location: Kentucky
Points: 268 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ac-mike Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2021 at 7:33am
For build up work that will be machined, I have always used #6013 for steel applications. I know this is not the strongest weld but it does machine.
D-12III, 200D, 170G, HD-3, D19D 3pt, D17D High Crop, WD45G p/s, D15IID, D15IIG, D15G IND, 655, (3)WD45D p/s, 700, 816
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Lee Bradley View Drop Down
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Joined: 13 Oct 2009
Location: Kingston, WA
Points: 117 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lee Bradley Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2021 at 9:02am
Some videos here well worth the time.

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