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  • Users: redpicker
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  1. redpicker

    Drawing security in AutoCad

    We use AutoCad 2010. Our policy is that AutoCad DWG files are not to be distrubuted to customers or vendors. Only PDFs or plots of the drawings are allowable for distribution. We have a vendor who has a legitmate need for the actual DWG file for some of our proprietary designs to simplify...
  2. redpicker

    Ultrasoinc Impact Treatment questions

    Does anyone have any good information about Ultrasoinc Impact Treatment (UIT)? I searched the achrives and found a few posts that mention UIT, but not much. The websites that are written to sound like a bunch of hype. I suspect, like cyrogenic treatments and vibratory stress relief, there is...
  3. redpicker

    Effect of Copper in Low Alloy Steels

    Since I got so much good information on the Calcium issue, I thought I'd go to the well again and see if I can get some information on Copper. I process low alloy steels (mostly Cr-Mo steels of various carbon contents; AISI 41XX or derivatives). We consume heat lots from the steel mills and...
  4. redpicker

    Calcium in Steel

    I know that calcium is intentionally added to steels, particularly continuous cast steels, to improve castability. I know it can also be used to control the morphology of the non-metallic inclusions, particularly the Manganese Sulfides. This shape control can improve the transverse ductility...
  5. redpicker

    Elevated Temperature Yield Strength AISI 1340

    Does anyone know what the yield strength of 1340 steel would be at 1500 deg F? How about 4140 at the same temperature? The best info I can find tells me it should be around 10,000 PSI for either material. Anyone have any better data? Thanks rp
  6. redpicker

    Large Crankshaft Repair

    This is a large crankshaft, about 14 inch main journals. A single throw of about 18 inches (or would that be twice that, 36 inches?). About 15 feet long. It drives a very large mechanical press forge. The problem is that it has developed cracks in the throws and one of the key-ways failed...

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