Posted by Guy Reed on September 20, 2009 at 10:53:13 from (216.75.124.10):
In Reply to: Broken Cast posted by PF on September 18, 2009 at 17:34:02:
Good day Sir, You asked the question "what is the best way to repair cast iron"? I would have to say for your situation I woud braze. DO NOT ARC WELD YOUR CASTING!!!!! UNLESS YOU CAN HEAT IT TO 1800 DEGREES. When arc welding cast iron you are attempting to fusion weld it and fusion welding of cast iron requires it to be at the proper temp. Brazing is different, you are not trying to melt the base metal. And just so that you are properly informed, yellow brass or low fuming bronze has a tinsel strength of 65000 psi. and grey iron has a tinsel strength of between 20000 and 40000 psi. So if you prepare the surfaces and if necessary pre-heat properly you will have a part that is as strong as new. If you would like to call me I will be glad to assist you in any way I can. If you could send me a picture that would surely help. Please take a minute to visit my web site. Thank you
Guy Reed Owner Industrial Casting and Gear 2845 co. rd. 160 Albin Wy. 82050 (309) 275-1046
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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