Heat treatment of 3" dia. 4130
Heat treatment of 3" dia. 4130
(OP)
What is the recommended temperatures and times for Heat treatment of 3" dia. 4130- 6 in length?
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Heat treatment of 3" dia. 4130
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RE: Heat treatment of 3" dia. 4130
Also, what hardness or mechanical requirements must be met on the final product?
RE: Heat treatment of 3" dia. 4130
RE: Heat treatment of 3" dia. 4130
I am not surprised at getting 15/20 HRC as-quenched since you are probably dealing with an as-rolled piece of stock. Have you considered rough-machining?
RE: Heat treatment of 3" dia. 4130
je suis charlie
RE: Heat treatment of 3" dia. 4130
RE: Heat treatment of 3" dia. 4130
Aidan McAllister
Metallurgical Engineer
RE: Heat treatment of 3" dia. 4130
We had good with quenching in water. Current Rc. is 55Rc. To get 35 Rc. what draw temp. do you suggest. Our 2759 says 1200 for 4hours. Old school charts tell us 880 for 2 hours.
RE: Heat treatment of 3" dia. 4130
RE: Heat treatment of 3" dia. 4130
Do you have any kind of oil analysis for the Houghton-Quench K? I curious what could've gone wrong with it to cause such a large difference in results.
Aidan McAllister
Metallurgical Engineer
RE: Heat treatment of 3" dia. 4130
I'm confused.
I wouldn't use 1200F, but the 4 hour cycle is fine, I think I'd try 1100F for tempering, maybe even 1080F. It it better to be on the hard side so you can correct it with a second tempering operation than to be too soft and have to start over from the start. After tempering, measure the hardness again and go up about 10 degrees for every rockwell point you need to drop. That is, if you are 45 HRC after tempering at 1080F, but you were aiming for 40 HRC, retemper at 50 degrees higher, or 1130F for another 4 hours.
You might want to consider standing these on end for quenching, particularly if you are getting some distortion. A length to diameter ratio of 2 isn't that bad, but if you had longer parts or smaller diameter, you could end up with banana-shaped parts.
RE: Heat treatment of 3" dia. 4130
RE: Heat treatment of 3" dia. 4130
Thanks again to all
RE: Heat treatment of 3" dia. 4130
RE: Heat treatment of 3" dia. 4130
Look up some temper curves that have impact toughness data on them.
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P.E. Metallurgy, Plymouth Tube