Machining Hastelloy B
Machining Hastelloy B
(OP)
I'm having a nightmare turning this Material (Hast B) without getting the "Orange Peel" effect. Does anyone have any Magical explanation on how to reduce the visual effect of this orange peel? Perhaps SFM or tools?





RE: Machining Hastelloy B
I have not failed. I've just found 10,000 ways that won't work." — Thomas Edison
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RE: Machining Hastelloy B
A.R. "Andy" Nelson
Engineering Consultant
anelson@arnengineering.com
RE: Machining Hastelloy B
I've try many ways to avoid the "orange Peel" I've taken very light cuts even tried cutting .003" and still get the same thing. I also tried cutting with oil to no success I'm starting to think that it's just the Material.
RE: Machining Hastelloy B
Not had any experience with Hastelloy, but I've often found "orange Peel" is caused by edge rubbing and tip dulling, especially on light cuts and found that a smaller tip radius on the insert helps minimise this.
RE: Machining Hastelloy B
http://www.haynesintl.com/pdf/h2010.pdf
The others have identified the issue: too much heat generated by a dull tool. Are you using carbide inserts? A premium oil-based lubricant that is formulated for nickel-based alloys? Have you discussed your application with one of the insert manufacturers like Seco, Valenite, Sandvik, etc.? The latest generation coated carbide tools are significantly better at retaining a sharp edge, and with proper tool setup, the heat should go with the chip, not remain in the workpiece.
RE: Machining Hastelloy B
RE: Machining Hastelloy B
RE: Machining Hastelloy B
RE: Machining Hastelloy B
RE: Machining Hastelloy B
RE: Machining Hastelloy B
what type of coolant/
what type of holder & inserts.
I use to work with this stuff it does not not like small
feeds rates & depth of cut. Work Hardens like hell.
.015 min depth of cut when finishing.very very slow with carbide, , very fast with ceramic.
.050-.060 or more depth of cut with ceramic inserts.
depending on the rigity & horspower of your machine.
surface feed depends on the inserts.
Recommended from the Machining Hand Book Volume 1
Annealed or Solution Treated.
Carbide inserts C-2 grade, depth of cut .030, 100 SFPM , feed.005-.007 IPR
Carbide inserts C-2 grade, depth of cut .100, 90 SFPM , feed.005-.007 IPR
RE: Machining Hastelloy B
The trick here is to do the RPM's per the cutters diameter and composition, which determines the surface feet. Then you can go fast as feed will permit and or finish requirement allows. However, only engage 10% to 15% of the cutter cutting edge to allow it to cool. I, myself didn't believe it at first. But I saw it with my own eyes and was amazed.