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Grinding Inconel and Need Help with Problems
Q. I just started working for my company and ran into a problem with grinding a root form on a turbine engine blade. The material is Inconel and we are grinding this form on an Ex-Cello 600 using Oil as our coolant. The problem we are having is eliminating surface white layer (over heating). Does anyone have an idea as to how to eliminate this problem?
Herman Ehlers- Chandler, Arizona, USA
2003
A. Inconel has a very high % of nickel. Nickel really should not be ground. If you are going to do it anyway, take a thinner cut (possibly a lot thinner cut), check your speeds, check your feeds. Switch to a wheel that breaks down faster. You are plugging the wheel which is causing a burnishing as well as a cut, thus the "white" layer. Norton is probably as good a reference as any to the proper grit size and correct "binder". I would surely rather talk to their Tech service than a sales rep.
James Watts- Navarre, Florida
2003
A. We have had a very positive experience grinding Inconel with a vitrified CBN wheel with induced porosity. The wheel is so porous that you can actually see the pores with a naked eye. These pores allow the wheel to grind much, much cooler than other wheels. The problem might be with grinding the profile into the CBN wheel, but if you have a good diamond rotary dresser, it will not be a problem.
Gennady Gurinovichabrasive wheel supplier - St. Peterburg
2004
A. Do you work at Turbomachinery? I would suggest you talk to Steve Bunkowske. I believe he still works for your company.
Andy Chambers- Lewis Center, Ohio
March 11, 2008
Q. We are working for aerospace company.
Can you suggest what is the best dressable grinding wheel for machining INCO-718 on cylindrical grinding machine? We have a single point diamond dresser -- 6 carat.
Please suggest ...
- Bangalore, Karnataka, India
December 27, 2012
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