Posted by george md on February 26, 2013 at 20:26:33 from (209.213.167.201):
In Reply to: Need some advice posted by aarolar on February 26, 2013 at 15:45:03:
That is a good job for O/A cast iron welding, many times arc weld on something like that will come back to haunt you.Brazing would be much better than arc ,and o/a cast iron would be better yet , and stronger as it becomes part of the work and not bonded to it.
Items needed -- pile of fire brick,1 or 2 large propane torches ,# 4 or 5 welding torch, can of good welding flux , temp gun to get the temp right to weld and to normalize when done, ceramic fiber to cover while heating and cooling.
Need 1000 to 1200 deg preheat to weld and 1500 to normalize ( for 15 minutes ) when done.Temp drop from 1500 to 1200 should take at least 1/2 hour so as not to chill and make it hard and brittle.
Below is a photo of the brick oven to heat the engine. Also the link below will show the cylinder before and after the weld.
george
oven with 2 propane burners to heat casting to 1200 deg F to weld
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