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Recent content by TCallahan

  1. TCallahan

    Improving Wear Resistance of Valve Rods

    The decision has been made (barring extreme cost) to go with case-hardened 8620 with a TiCN coating. Thank you all for your input.
  2. TCallahan

    Improving Wear Resistance of Valve Rods

    Good Lord, that's a lot of options: - Ceramic Coating on steel - Hard Chrome Coating on steel - Fully hardened A-series steel - Case-hardened 8620 - Solid Ceramics instead - Alter design to change seal mechanics. I think the first step is definitely to replace the seals with something tougher.
  3. TCallahan

    Improving Wear Resistance of Valve Rods

    Just got off the phone with our local machine shop. He recommended A-series steel fully hardened, with a note that 60-62 Rockwell C is attainable this way. I'm comparing prices as far as that versus 8620.
  4. TCallahan

    Improving Wear Resistance of Valve Rods

    By superficial, I mean that it didn't stand up to a caliper blade.
  5. TCallahan

    Improving Wear Resistance of Valve Rods

    The color is a pretty good match for the TiN tools we have in the shop, and I can't think of any other reason for it to be this color. Good point. I think the decision then was, lets make it stainless steel for corrosion resistance (which, in our application, doesn't matter, the compound is...
  6. TCallahan

    Improving Wear Resistance of Valve Rods

    Hello all, This is my first post here, proud to be doing so. I've been googling through this site this afternoon, and it's been very informative. I'm working with a metered mix system with a worst-case kind of application, dispensing an aluminum oxide filled thermal compound. The compound...
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