Heat Treating services?

[Camo5]

Anyone know of somebody who can do heat treating services? I figure i should make spinooks shell up to R42-45 just to make sure bots like vile ant cant pick away little chunks over time. Its shell is made from 4340 steel

[FingerTech]

Whyachi can do it if you're willing to pay way too much.  There are a couple guys on this forum who have done it themselves too.  I want to say Alex Horne (ZoopDogg); but I'm not sure on that.

[Camo5]

Or another question if I end up doing it myself: what temperature and quench type should i use for 4340 steel at R45 hardness? Something around 800F and quenched in oil?

[rcjunky]

you'll want to raise its temperature in an over to 1550*f and hold it there for probably 10mins (assuming said parts are under 1" thick which I figure is safe in bots) then quenched in oil. When its cooled in the oil until its warm put in in an oven and raise it to 800*f and hold it there for and hour. Remove and let it cool in air. Once its cool I'd typically do a second draw (oven to 8008f and cool again) to be safe but don't know if its necessary to do 2 draws with 4340. I'd also typically check hardness each time its cooled if you have access to the required equipment.

[Camo5]

Thanks for the info.

A local company Med-Tek can do it for $45 though, and they have all sorts of oils and salts etc for stuff

[rcjunky]

yup, getting someone with experience to do it isn't a bad idea. Heat treating it wrong could just lead to failure (like if you harden it one day and draw it back the next, it'll probably crack on first impact)