Knurling COBALT ALLOY
Knurling COBALT ALLOY
(OP)
We are attempting to produce a Medium straight knurl on Stellite alloy 6B. After trying a number of different tools we are still having no success, any suggestions are welcome.
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RE: Knurling COBALT ALLOY
RE: Knurling COBALT ALLOY
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
Good engineering starts with a Grainger Catalog.
RE: Knurling COBALT ALLOY
Mike Halloran
Pembroke Pines, FL, USA
RE: Knurling COBALT ALLOY
Knurling is a material displacement process. If the material's really that hard, it may not be practical.
Or send it a laser etching house and let them try something.
Or take the easy route and just attach a knob to it.
TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering
www.bluetechnik.com
RE: Knurling COBALT ALLOY
1. You will need to create a profile with a high penetration rate, so that material is displaced as much as possible early in the process. Work hardening during the deformation process will make it extremely difficult to fill out the profile at the end of the cycle.
2. Die material will need to be very hard: M42 with a hardness of > 65 HRC would be my first choice. Have you discussed this with OSG, PTG, etc.?
3. Have you investigated warm rolling? I haven't looked at the strength vs. temperature characteristics of Stellite 6B, but difficult to roll materials are usually heated in the range of 480 C then introduced to tools that have been pre-warmed (~ 90 C). This is why M42 HSS tool steel would be a good idea, as it has very good resistance to softening (temper resistance) and hot strength.