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Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing since 1989
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How to harden AL2024-T351?
I am a mechanical engineer for a small aerospace company. I would like to find out a process as well as specification for hardening a section of an Aluminum 2024-T351 one-off part. Part is essentially a machined channel, 2 inch web, shaped in a 33" dia. ring with the flanges of the channel concentric to the ring centerline. Inside surface of outer flange needs to be hardened for use as a track for a cadmium plated chrome steel roller bearing.
1) Can only that surface be hardened, or must entire part be treated?
2) What process and specification can be use to do this?
3) Will process affect heat treat?
4) Any recommended shops? Input is greatly appreciated...
- Tulsa, Oklahoma
2000
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by J. Gilbert Kaufman
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Well, I don't have the answer to your problem. But I do have a question for you. Why are you using 2024-T351? For aerospace usage, 2024-T3XX, -T4XX and -T6XX are usually forbidden tempers due to stress corrosion crack susceptibility. Consider using the 2024-T8XX or another alloy if possible.
Kirk Mueller- El Segundo, California
2000
In principle the 2024-T351 is already heat treated. If you still just want to harden a specific section then here are two tips:
1. Laser induction furnace - very expensive and works only with sheets
2. DC current - very difficult because you have to wrap the rest of the material with Teflon tape.
As a solution I would look at shot-peening, it is cheap and localised.
University of Sheffield - Sheffield, UK
2001
Contact Alcoa Alum; they are the experts in this field---
www.alcoa.com/mill_products/catalog/pdf/alloy2024techsheet.pdf
- Tallmadge Ohio
March 11, 2010
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