Half Shaft High Temperatures!

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Apr 28, 2013 | 11:54 PM

Ibanez540r

Thread Starter

Drifting

Joined: Oct 2012

Posts: 1,524

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From: Medina Ohio

Half Shaft High Temperatures!

I do all of my own powder coating, and I spent ALL DAY prepping my half shafts to get coated to go on the chassis. Media blasting, cleaning, honing the bores, etc.

Anyway, all parts I "pre-bake" at about 425 degrees F to bake off any oil or grease left after wiping down with acetone and to out gas the metal. Usually for about 20 min. once the part is up to temperature. This is common practice with powder coating. ...I forgot they were down in the oven and they sat at those temperatures for around 2 hours

What do you think about their integrity now?

Apr 29, 2013 | 12:44 AM

rayluka

Drifting

Joined: Aug 2007

Posts: 1,838

Likes: 13

From: Kingman AZ

The temperature was too cool to have any reaction in the metal.

Apr 29, 2013 | 05:30 AM

DZRick

Le Mans Master

Joined: Jun 2005

Posts: 5,447

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From: Syracuse NY

Quote:

Originally Posted by rayluka

The temperature was too cool to have any reaction in the metal.

Apr 29, 2013 | 11:29 AM

7T1vette

Team Owner

Joined: Jan 2006

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From: Crossville TN

Hardened parts might be tempered slightly by that temperature....but I don't think there is any hardening performed on the half-shafts or the yoke pieces. Should not be a problem.

Apr 29, 2013 | 12:36 PM

bmprhmpr

Instructor

Joined: Jul 2010

Posts: 120

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From: Virginia

I agree with 7T1vette, the only part of the shafts that were probably heat-treated are the yokes. If it did anything it stressed relieved them and did not lower the rockwell reading ( scale of hardness). Frank.

Apr 29, 2013 | 02:02 PM

Ibanez540r

Thread Starter

Drifting

Joined: Oct 2012

Posts: 1,524

Likes: 61

From: Medina Ohio

Thanks for the reassurement guys. I'll finish up coating them this evening.

Apr 29, 2013 | 04:57 PM

7T1vette

Team Owner

Joined: Jan 2006

Posts: 37,637

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From: Crossville TN

Yokes weren't heat treated [for hardness]....only for tempering to relieve casting stresses.

Apr 29, 2013 | 05:33 PM

bmprhmpr

Instructor

Joined: Jul 2010

Posts: 120

Likes: 4

From: Virginia

I stand corrected.

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May 1, 2013 | 12:29 AM

rayluka

Drifting

Joined: Aug 2007

Posts: 1,838

Likes: 13

From: Kingman AZ

more info

A tad more info

http://www.technologystudent.com/equip1/heat1.htm

These low temps only temper steel. Like stated earlier. Stress relief based on level of heat. Not major molecular changes. Also, as stated by bmprhmpr rockwell number should have remained constant even after heating. Hammer on!

Last edited by rayluka; May 1, 2013 at 12:43 AM.