Help with leaf spring for autos

J

Joe W

Joined
May 9, 2000
Messages
59
I'm having trouble with the spring breaking in a knife I made. I heat treated it and then heated it with a torch until it was blue. It got to the blue color real fast. Does it heat up to fast with a torch? Do I need to hold at 700 deg. for a longer period of time?
The spring did work for a couple of days, and the small spring for the lock return is still working fine.
Thanks, Joe

 
Joe,
What did you make the spring out of? O-1 works well. You have to heat treat it like a blade, bring it up to 1500-1525 and quench it in oil, then clean it off so you can see the colors when you heat it with the torch. Heat it to a light blue and then your done. You can't adjust it after you heat treat it so have it at the arc you want.
Hope this helps
Chuck

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A Knife is no more than an Iron Tooth
 
The spring is made out of 1095. I heated to non-magnetic and quenched in 110 deg. oil. I cleaned it off and heated it with the torch and it only took a second or two to turn blue.
Thanks for your help.
Joe
 
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