[AT] A long shot--Wisconsin part

[Mike Reggie]

  John:  I might be able to offer some information on the rubbing of the 
carbon stick on the weld.

If you've ever had a nice fresh cast iron weld crack on you, you will have 
noticed that it doesn't crack on the weld itself, it cracks on either side 
of the weld.  without getting into all the science as to why that 
happens,[I've tried for years to understand it] it is basically because the 
heat of the weld draws the carbon from the surrounding part of the metal to 
the heat zone of the weld, and causes it to crack. So the theory was that 
the carbon would help to fill in at the spots it was being pulled from, this 
is also the reason for the pre and post heating, and burying in sand or 
lime, etc.

  I do all kinds of welding on an almost daily basis, and a part of that is 
sometimes cast iron, some of it with stick, and some of it with heli-arc, I 
dislike it very much, there have been really great products developed in the 
last 20 or so years for cast iron welding, but its whole purpose is for  
repair, I have never seen it as a means of normal cast iron joinery. No 
mater how much I've done, or what I see others far more talented and 
informed than myself do, I just can't seem to get comfortable with the whole 
idea of cast iron welding.

That being said, my preferred method for the repair of cast iron is brazing, 
be it with brass, silver, or with cast iron filler, it just seems to "work" 
better. Just remember, clean, clean, clean, and plenty of quality flux, and 
of course never forget that brazing is dependent on capillary action, it is 
not a soft weld.

  This is just my opinion, I hope it is of some help   ........ Mike



----Original Message Follows----
From: Ed Stewart <edstewart1 at verizon.net>
Reply-To: Antique tractor email discussion group 
<at at lists.antique-tractor.com>
To: Antique tractor email discussion group <at at lists.antique-tractor.com>
Subject: Re: [AT] A long shot--Wisconsin part
Date: Wed, 28 Jun 2006 15:55:04 -0400

John it just, comes with time, I have been building and repairing junk for 
fifty years now. I was born a poor farmer and soon learned from my dad to 
make do with what you got.. I use a Miller wielder now, but we sure gave the 
old Forney machine a workout for many years. Ed

John Wilkens wrote:
>Well, I see there's a lot more to know about welding rod than I realized! 
>It'd be interesting to know more about that "rub on carbon" that filled the 
>pores. John
>
>
>
>At 05:41 AM 06/28/2006, you wrote:
>>Hi, 7018 seems to do a good job also if you have a dc machine, I don't so 
>>I buy 7018ac they work ok on ac but still are hard to keep burning 
>>although they start a lot better than a straight 7018, my Dad used to buy 
>>Lincolin number 375 for cast iron they did a fine job wielding up the head 
>>of an F20 that cracked sorta zigzaged between the valve springs when we 
>>somehow forgot to drain the water and it froze. As soon as the wield was 
>>done there was a fat stick of carbon looking stuff you rubbed on the wield 
>>and it sucked in and filled any pores. The F20 ran for many years after 
>>the repair..
>>
>>ivan wrote:
>>>John , I used a stick welder on ac . No not nickel , but they are for 
>>>cast
>>>iron . The weld is not shiney at all like a nickel rod would look . I got
>>>them at the local welding place . I think they were made by UTP ,anyhow 
>>>they
>>>dont carry them any more .
>>>I also have some "Forney" brand and again they are not nickel either .
>>>I have heard of some guys using an ac 7018 for old cast iron but nvere
>>>tried it . Ivan
>>>
>>>
>>>_______________________________________________
>>>AT mailing list
>>>Remembering Our Friend Cecil Monson 11-4-2005
>>>http://www.antique-tractor.com/mailman/listinfo/at
>>>
>>>
>>
>>--
>>Ed Stewart
>>Reynoldsville, Pennsylvania
>>15851
>>
>>This email generated without the help of Micro$0ft,
>>using Ubuntu linux Http;//www.ubuntu.com
>>
>>There is a crack in everything. That's how the light gets in. "L.Cohen"
>>
>>_______________________________________________
>>AT mailing list
>>Remembering Our Friend Cecil Monson 11-4-2005
>>http://www.antique-tractor.com/mailman/listinfo/at
>
>
>In the wide-open spaces of NE Oregon
>
>
>_______________________________________________
>AT mailing list
>Remembering Our Friend Cecil Monson 11-4-2005
>http://www.antique-tractor.com/mailman/listinfo/at
>

--
Ed Stewart
Reynoldsville, Pennsylvania
15851

This email generated without the help of Micro$0ft,
using Ubuntu linux Http;//www.ubuntu.com

There is a crack in everything. That's how the light gets in. "L.Cohen"


_______________________________________________
AT mailing list
Remembering Our Friend Cecil Monson 11-4-2005
http://www.antique-tractor.com/mailman/listinfo/at