Flywheel Heat treat/Material
Flywheel Heat treat/Material
(OP)
Hey everyone. I'm having a custom flywheel machined, and I wanted to know what heat treat specs you all think I should be shooting for. It'l be made of 4140, unless anyone can give me a reason I should step up and use 4340 ($). I'm thinking I want a through heat treat, on the order of rc45, comments, suggestions?
-Chuck
-Chuck





RE: Flywheel Heat treat/Material
Also 45 HRc is relatively hard for these alloys. 40 will give you higher impact strength and better resistance to scc etc...
RE: Flywheel Heat treat/Material
so mabye specify Rc 37-42, or something?
RE: Flywheel Heat treat/Material
Just red flag your own post in the forum that got the least response.
Cut and paste any useful info from the forum you red flag.
Start a new thread if necessary in the forum where you red flag, advising where the remaining thread is.
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RE: Flywheel Heat treat/Material
What are you going to use it for ?
Are you revving it so high you need strength ?
If clutch heat is likely to happen, I'd be thinking the un-hardenability of mild steel might be an advantage.
RE: Flywheel Heat treat/Material
Cept that 4130 is commonly tempered at 1000F, and the austenization temp is around 1600F, If his clutch sees these temperatures more than instantaneously it wont matter what his flywheel is made of.
I'm going to assume you are going to finish machine/grind after heat treating. I would ask the heat treater to harden to 35-40HRc. ( this could be done using an oil quench and then tempering at ~1000F for 2hrs or so.)
RE: Flywheel Heat treat/Material
Chuck