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| 03-02-2008, 04:19 PM | #1 |
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Brigadier General
 
Drives: 2008 335xi Coupe Join Date: Feb 2007
Location: The land where we kill baby seals
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Powdercoating Wheels - weaken wheels?
Gents,
I would like your opinion. I am interested in powdercoating an extra set of OE M6 wheels. They are forged. I want to powdercoat my OE wheels, but the 400 degree F curing process scared me as this may wreck the forging. I will be tracking my car and don't want to weaken the wheels. I have already painted one set of wheels but I am interested in powdercoating the other set. Any opinions on whether the 400 degree F would weaken forged wheels? Anyone know of a good place in the Toronto area? Thanks. I have posted this thread on the M5board but there is no definitive answer there.
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"Aerodynamics are for people who cannot build engines"......Enzo Ferrari
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| 03-02-2008, 11:45 PM | #2 |
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Looking for that special M Coupe
Drives: Honda S2000 Join Date: Nov 2007
Location: Orlando, Fl (ex-southern californian)
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I have heard about this happening but yet to see this happen... just get it powdercoated by a professional and you shouldn't have any problems...
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-Steven
Current - Honda S2000 (road racing warrior) Future - BMW M3 Coupe  |
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| 03-03-2008, 09:07 AM | #3 |
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Commander-In-Chief
Drives: 2008 M3 Coupe, 2012 ML350 Join Date: Nov 2005
Location: Lake Oswego, OR
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Pwder coating forged wheels
This from Ralph Sheppard of RAC, "I cannot speak for anyone else's wheel - ours is a components of heat forged and can take anything up to 900 F."
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 Greg Lake Oswego, Oregon, USA 2008 M3 Coupe - Alpine/Fox Red/Carbon 2015 M4 pre-ordered 2012 Mercedes-Benz ML350 |
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| 03-03-2008, 10:54 AM | #5 | |
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Brigadier General
Drives: 2008 335xi Coupe Join Date: Feb 2007
Location: The land where we kill baby seals
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Quote:
Your guess is as good as mine..... What ever materials BMW uses for their forged wheels is the best answer.
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"Aerodynamics are for people who cannot build engines"......Enzo Ferrari
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| 03-05-2008, 01:14 PM | #6 |
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Major General
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So, I spoke to my materials scientist friend. Too many unkowns for you to have a straight answer. If the wheels were simply forged and not heat treated afterwards in any way, which he thinks is most likely the case, by curing them at 400 degrees F for "long enough" you might indeed weaken them as the the beneficial effects of strain hardening that occurs during the forging process might be reversed. That was going to be my initial response based on the introductory materials science class I took 15 years ago, but here we have it confirmed by an expert. Regardless, a specific answer cannot be reached without knowing if the wheels were heat treated after being forged and how long they will be cured for during powder coating at 400 degrees F.
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| 03-05-2008, 01:29 PM | #7 |
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Major
 
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Are the M3 wheels forged too? I plan on powder coating mine when it gets here.
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| 03-05-2008, 01:47 PM | #9 | |
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Commander-In-Chief
Drives: 2008 M3 Coupe, 2012 ML350 Join Date: Nov 2005
Location: Lake Oswego, OR
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Quote:
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Greg Lake Oswego, Oregon, USA 2008 M3 Coupe - Alpine/Fox Red/Carbon 2015 M4 pre-ordered 2012 Mercedes-Benz ML350 |
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