[SEL] Cast iron welding

[Ed Stoller]

Life is temporary and I always wanted to learn how to weld. My first major project is about 18 inches of crack in a WWII Onan generator block from being dropped. I am using a MIG, Silicone Bronze wire and Aragon  gas. I had planned to use Stainless Steel wire, but the Helium gas for it was much more expensive. I am also welding a crack in the CI muffler. I am doing short, less than and inch stitches and then letting it cool. So far, no new cracks. I think the MIG in not putting as much heat into the block as a stick welder would, but also think I am not getting much penetration, which I probably don't need any way. The main problem I have is that the weld seems to want to form large blobs. I am glad I started on the inside of the block where the weld will be out of site. The Bronze is easy to grind down and I expect to be able to drill it if I need to. My practice welds with flux core wire got much better with practice, But it looks like I have to live with the blobs of bronze.

Ed Stoller
New Fairfield,  CT,   USA
www.enginesandmagnets.com

----- Original Message ----- 
From: "Reg Ingold" <randmingold at hotkey.net.au>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Wednesday, March 27, 2013 7:07 AM
Subject: Re: [SEL] Cast iron welding


> There are a lot of new type rods on the market for cast iron.  Consult the 
> experts for the best on your job.
> The new stuff allows better repairs, with more 'flex' on cooling, etc.
> Reg & Marg Ingold
> Newcastle NSW Australia
> randmingold at hotkey.net.au
> http://www.oldengine.org/members/randmingold
> ----- Original Message ----- 
> From: "Glenn Wilson" <wilson at stny.rr.com>
> To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
> Sent: Wednesday, March 27, 2013 9:00 PM
> Subject: Re: [SEL] Cast iron welding
> 
> 
>>
>> Hi Guys
>> I know this has been discussed before, but I guess unless you are 
>> interested at the time you don’t take it in.
>> My friend has a tractor that has a cracked housing at the front, not sure 
>> exactly, but it is a load bearing part.
>> OK, what is the best way to weld this here in Australia, type of rods, 
>> techniques, pre-heating, cooling etc.
> 
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