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Can anyone heat treat 4130?

Pau11y

Pau11y

Turbo Monkey
Oct 20, 2004
1,968
0
In a web in the corner of your room
Anybody in the house that can heat treat 4130 Cromoly and straighten it afterwards if it warps? It's an annealed piece 8.25" long (around 210mm) x 19mm dia. The tolerance is approx. 0.05mm. From what I've gathered, it should be taken up to Rockwell 42c hardness. Also, it should be heated vertically and fixtured when quenched. This is related to my thread about the 19mm Profile spindle (http://www.ridemonkey.com/forums/showthread.php?t=106331). Anyone w/ the ability to do this, please let me know, thanx.
 
buildyourown

buildyourown

Turbo Monkey
Feb 9, 2004
4,832
0
South Seattle
What? Did somebody say my name.
I could do it if I had an oven. But I don't. Any good tool and die shop should be able to hook you up.
Ideally is should be done in a vacuum furnace, but somebody who knows what they are doing can improvise enough to make it work. Hint: It involves several sheets of notebook paper, stainless steel foil and a hammer.
 
Pau11y

Pau11y

Turbo Monkey
Oct 20, 2004
1,968
0
In a web in the corner of your room
You guys will love this. When I was calling around for heat treater, I got hold of a sales guy for an unnamed aerospace house. He told me to see if I can just fire up my broiler and throw it in there for 3-4 hours, then throw it in my sink to cool it. This is from someone from an aerospace house! Dude!? WTF!
 
buildyourown

buildyourown

Turbo Monkey
Feb 9, 2004
4,832
0
South Seattle
WTF is right. You need to get 4130 up to about 1800-1850 to get it hard. Then quench in a large vat of oil. When you put the red hot piece of metal in the oil, it will catch on fire. Make sure you have a lid close!
Then you need to get it up to about 400-500 deg and hold it there for several hours. If you can do all that in your kitchen, let me know.

I have done small pieces of W2 steel with a blow torch and a coffee can of water. It can be done, but it's really hard to know when you got it right. I wouldnt trust myself with a BB spindle.
 
Pau11y

Pau11y

Turbo Monkey
Oct 20, 2004
1,968
0
In a web in the corner of your room
Yeah, I think the guy was making fun of me. Ya know, ppl who build airplanes and rockets laughing at bicycles. Bastard!
Hehe, if I could do that in my kitchen, I think I'd be sporting a couple of horns from my skull w/ lights shinning thru my eye sockets.
 
vitox

vitox

Turbo Monkey
Sep 23, 2001
2,936
1
Santiago du Chili
ill be doing some heat treating next wednesday, if its cost effective for you to ship that axle down to me, send me a pm and ill get it done for free.
 
Pau11y

Pau11y

Turbo Monkey
Oct 20, 2004
1,968
0
In a web in the corner of your room
vitox said:
ill be doing some heat treating next wednesday, if its cost effective for you to ship that axle down to me, send me a pm and ill get it done for free.
Click to expand...
Thanx for the offer but I've already sent it off to Denver to have it done. Plus, I think it'll be more costly to send it than to just pay and have it done here.
BTW what do you do? Are you a machinist or a builder? Any good DHing at your neck of the woods?
 
vitox

vitox

Turbo Monkey
Sep 23, 2001
2,936
1
Santiago du Chili
Pau11y said:
Thanx for the offer but I've already sent it off to Denver to have it done. Plus, I think it'll be more costly to send it than to just pay and have it done here.
BTW what do you do? Are you a machinist or a builder? Any good DHing at your neck of the woods?
Click to expand...

great to see you found a way to get it done, and as for your questions: no, not really, YES!
 
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