Re: cracked head

Posted by george md on January 08, 2005 at 22:15:49 from (65.216.222.101):

In Reply to: Re: cracked head posted by hjp on January 08, 2005 at 20:52:23:

Hjp,
I do spray welding, and have for almost 30
years and it is a great process. However for the
cracks that he describes the old fashened gas
weld is a much better process, oxy/acetylene
cast iron weld done with preheat in an oven .
Needs about 900 degrees preheat,then easy off
the heat, weld some , reheat to keep the 900 deg
weld more and heat many times untill done. Post
heat to 1200 to 1500 deg and maintain for at
least 1/2 hour to normalize.Wrap in asbestos
blanket and allow to cool slowly, should take
about 12 hrs to cool.

george

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