Machining causing 316 SS to anneal???
Machining causing 316 SS to anneal???
(OP)
I have been tasked to machine .009Ø pins 2" long for a customer. Using a CNC screw machine we are succesful at turning the parts from 1/8 bar. Here is the rub. My customer now says the machining is "annealing" the 316 CRES. Is this possible? If so what are any ideas to mitigate, Re solution H/T etc?
Thanks
Thanks





RE: Machining causing 316 SS to anneal???
I ask since it's really unusual for the small, localized heating from cutting to have any effect on the structure of the 316.
RE: Machining causing 316 SS to anneal???
RE: Machining causing 316 SS to anneal???
My first attempt at explaining the 'extrusion' is that the outside surface of the bar was in tension from the manufacturing process- however the steel mill made it. The center would have balancing compressive stresses on it. Once you machined off the outer layer, the inner core reacted to no longer being compressed, and grew.
Good luck! Oh, my hat's off to you, by the way- I find it amazing you can turn 9 mil pins from 125 mil bar!
RE: Machining causing 316 SS to anneal???
He needs to specify what properties he requires. Make it springy is not a spec.
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Plymouth Tube
RE: Machining causing 316 SS to anneal???
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RE: Machining causing 316 SS to anneal???
RE: Machining causing 316 SS to anneal???
RE: Machining causing 316 SS to anneal???
They probably draw +/-0.0002" at this size.
I looked in the basement and I don't have any that size laying around.
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Plymouth Tube
RE: Machining causing 316 SS to anneal???