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Cowboy Wok

 
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smokinrick



Joined: 03 Sep 2010
Posts: 6
Location: Austin TX

PostPosted: Wed Jul 25 12 11:19 pm    Post subject: Cowboy Wok Reply with quote

Hey guys,

Buddy of mine picked up an old harrow disc yesterday and asked me to weld the horseshoes to it and fill in the hole. I had done this with one of the new discs previously with no issues. This old, used disc was much thinner than the new one was but 500 times harder to weld, for me. I'm a beginner welder with a Hobart 140 mig machine. I used a large, thick steel washer to fill the center hole and it seemed like I could never get the disc metal to "puddle" correctly or maybe a better description is that it seemed to not melt (had the same issue when welding the horseshoes). Forgive my simple terms. I have had no problems welding much thicker metals previously so why am I having an issue with the "old" steel that's barely 1/8th inch thick? I tried the welder on both the highest setting and the next highest setting (3 and 4) with adjustments to the wire speed between 40 and 60.
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k.a.m.
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Joined: 12 Dec 2007
Posts: 26003
Location: Southeast Texas.

PostPosted: Thu Jul 26 12 10:50 am    Post subject: Reply with quote

smokinrick, how clean was your disc before welding? It could also be a bit magnetized from years of use.
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smokinrick



Joined: 03 Sep 2010
Posts: 6
Location: Austin TX

PostPosted: Thu Jul 26 12 7:52 pm    Post subject: Reply with quote

KAM thanks for responding. We cleaned up the disc with a flap wheel but what I noticed is the coloration of the disc wasn't your typical shiny metal but just a smoother dark brown surface. No amount of grinding would take us to shiny clean metal.
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k.a.m.
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Joined: 12 Dec 2007
Posts: 26003
Location: Southeast Texas.

PostPosted: Thu Jul 26 12 9:12 pm    Post subject: Reply with quote

smokinrick, my bet is with the age of the disc and its worn state that the oxidation was deep into the metal. I would check the plug hole with boiling water to make sure your weld is sealed. In cases like this a stick machine and a 6011 is a good choice for the first pass. I do not weld with wire but if you were running gas maybe switch to flux core for this application, it may help with the dirty metal.
I hope this helps. Smile
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smokinrick



Joined: 03 Sep 2010
Posts: 6
Location: Austin TX

PostPosted: Fri Jul 27 12 10:51 am    Post subject: Reply with quote

Thanks KAM. I'll give the flux core a shot and see if that works.
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TrailerBuilder
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Joined: 08 Feb 2010
Posts: 3151
Location: Springfield MO

PostPosted: Mon Jul 30 12 1:22 am    Post subject: Reply with quote

You might try to bevel the edge of the disc where your going to weld also, you might be able to expose enough shiney metal that way and get better penetration. Same thing on where your going to put your handles, take a die grinding wheel and cut a bit of a grove where you are going to weld. Might not do anything, might be enough to get it like it needs to be. Just my random thoughts Very Happy
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G Posik



Joined: 28 Jun 2012
Posts: 20

PostPosted: Wed Aug 29 12 10:48 am    Post subject: Reply with quote

You should run to Lanford equipment on the south side of town and pick up the disc without the hole. I have built about 125 of the cookers. I know some people that have welded the hole up and they work for a while. The last thing you want is the weld failing with hot grease on the burner. The new disc without the hole is $35.00.

Glenn
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1MoreFord
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Joined: 28 Jun 2005
Posts: 594
Location: N. Little Rock & Hot Springs, Arkansas

PostPosted: Wed Aug 29 12 10:55 am    Post subject: Reply with quote

Jeeze, for a new disc With welded on horse shoes for handles $55.00 is a good deal compared to $36.00 w/o the handles.

http://www.lanfordequipment.com/
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Buckshot500



Joined: 20 Sep 2012
Posts: 12

PostPosted: Sun Nov 25 12 12:24 pm    Post subject: Reply with quote

Pretty cool idea!
Just wanted to bring up the possibility that the disc metal may not be steel, or may be some kind of steel alloy such as stainless or maybe similar to hardfacing wire. Nickel and chromium content might make it difficult to weld as well.
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Buckshot500



Joined: 20 Sep 2012
Posts: 12

PostPosted: Fri Nov 30 12 9:54 am    Post subject: Reply with quote

I think some of these plow discs may not be made of steel, rather they are made of cast iron.

This can be Mig welded, but may be easier if pre-heated a little.

Cast can be stick welded with Nickel cast welding rods.

Test the metal with a grinder. Cast iorn sparks are fainter than steel sparks, and the cast sparks pop into little sprigs before they go out.

Here is a link;

http://www.searchsteel.com/2011/04/spark-test-of-steels.html
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k.a.m.
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Joined: 12 Dec 2007
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Location: Southeast Texas.

PostPosted: Fri Nov 30 12 10:12 am    Post subject: Reply with quote

Buckshot500, I doubt plow discs are cast iron. Cast iron is very brittle and would not be a good candidate for a disc because of the abuse they take. They are very hard steel for sure which makes welding them difficult at times especially if they are used then they may become magnetized some due to the wear and tear they get.
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Buckshot500



Joined: 20 Sep 2012
Posts: 12

PostPosted: Sat Dec 01 12 10:07 am    Post subject: Reply with quote

I can see your point, but I had read that some are cast iron.

(I think I read it on the Wikipedia page for Discada, not that Wiki is perfect)

Maybe it's cast steel, or not cast at all. A spark test would tell for sure.

Either way, I'm anxious to make one of my own.
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GF
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Joined: 30 Apr 2011
Posts: 2792
Location: Greenwich, CT.

PostPosted: Sat Dec 01 12 10:49 am    Post subject: Reply with quote

Buckshot500, the last few disks i bought(new), were spec.'ed as high carbon steel.
I did have problems with one cracking after I welded the plug in. Rolling Eyes
I've been pre-heating them and welding them with 7018 since, haven't had anymore issues. Very Happy
Get to building yourself one, you'll love it. Wink Very Happy
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