Hello Gene,
My company sells everything in the world for repairing cast iron. I think our powder torch is the best choice for cast iron repairs in situations like the manifold ears you spoke of.I'm not sure I would recommend it for blending in gouges in cylinder walls though. Although powder can be blended better than arc processes, it is hard to get rid of that fine line along side the bead where the deposit meets the parent metal. If not blended properly, this will appear after finish machining is completed. The degree of contamination in the base metal will play a large part. You have to make that call. A torch will also over heat if used in a confined area long enough. Here are some applications that I know have been completed with great success. They include a mix of joining and/or hardfacing. Cast iron parts, glass dies and molds, metal cams, fly knives, cement dies, metal to metal moving parts, corn cutters, plow sheares, steel shafts, stainless steel parts, feed screws, boring bars, cams, gate valve seats, horse shoe caulks, ice boat runners, snow mobile runners, mill hammers, mixer paddles, snow plow skids, tire chain links, casting blow holes, snap ring grooves, bed knives, hydraulic rams, ammonia knife tubes, fan blades, aerator tines, etc. Repair applications seem to be limited only to the imagination.
If you would like to receive literature, call 1-800-325-1568 and ask for Cathy or Sharron. You may also copy from our web site at http://www.usalloysweldtech.com I would be happy to answer any additional questions you may have.
Steve
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