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Old 02-11-08, 04:33 PM   #1
thatcher
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put my bike frame in the pizza oven

at 440 degrees for an hour. trying to level out the steel by uniformly heating n cooling everything at the same temp. useless or great idea?
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Old 02-11-08, 06:00 PM   #2
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don't forget the garlic.

that will help with the vampires, too.
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Old 02-12-08, 10:58 AM   #3
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good for powdercoating.....not hot enough to make any difference with the steel.
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Old 02-12-08, 11:57 AM   #4
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Bad idea. Shouldn't hurt anything structurally, but I think that if anything you will pull it out of alignment. Any time you want to mess with alignment you better have a means of measuring the results.

You are also high enough to oxydize the whole surface which probably just means a little more prep time.

You could powdercoat your own frame in there, I just wouldn't eat the pizza thereafter.
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Old 02-12-08, 03:43 PM   #5
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"level out the steel "

Meaning what?
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Old 02-12-08, 05:07 PM   #6
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just lower the steel temps evenly. sorry. bad tech talker.
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Old 02-13-08, 01:22 PM   #7
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Electric ovens suck for making pizza so I'm glad you found a good use for them. Wood fired is the only way to go for pizza...imo.
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Old 02-14-08, 12:13 PM   #8
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My boss/CEO, a material scientist who used to run a frame building class at the university, did this with his home built frames. I think it had something to do with driving the hydrogen out of the steel, as to the specific purpose of this I am unclear (avoiding hydrogen embrittlement?)

He loves to chat about this stuff so I'll ask him for details and report back...
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Old 02-14-08, 05:56 PM   #9
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Heat treating steel requires much higher temperatures, a little over double of what the pizza oven will do.
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Old 02-15-08, 11:06 AM   #10
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Are you trying to accomplish what a cryogenic type process would do? What you are asking sounds more like annealing to me. I don't think I would do it...
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Old 02-15-08, 03:51 PM   #11
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Quote:
Originally Posted by testtube View Post
My boss/CEO, a material scientist who used to run a frame building class at the university, did this with his home built frames. I think it had something to do with driving the hydrogen out of the steel, as to the specific purpose of this I am unclear (avoiding hydrogen embrittlement?)

He loves to chat about this stuff so I'll ask him for details and report back...
Post bake of 375 F +- 25 F is required after chrome plating of steels at
Rockwell C40 or above to reduce hydrogen embrittlement.
See fed spec QQ-C-320

I can't think of any other reason to do it.
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Old 02-15-08, 06:00 PM   #12
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Post bake of 375 F +- 25 F is required after chrome plating of steels at
Rockwell C40 or above to reduce hydrogen embrittlement.
See fed spec QQ-C-320

I can't think of any other reason to do it.

Does that reduce the hydrogen from the steel or chrome plating?
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Old 02-15-08, 06:11 PM   #13
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Does that reduce the hydrogen from the steel or chrome plating?
I looked up Hydrogen Embrittlement

The electroplating process can introduce Hydrogen ions into the steel through diffusion from the electroplating bath. The Hydrogen ions will eventually recombine to form the more stable diatomic Hydrogen creating pressure within the steel that may introduce cracking.

The process described by Cassave is used to drive the Hydrogen out of the steel.

I think this is why my boss pizza-ovened his frame as he had electroplated it (I think with Nickel) in leiu of painting it.
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Old 02-28-08, 02:32 PM   #14
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Heating to 440 can relieve stress in the frame, but it probably needs to be heated for more than an hour. If there is stress from welding/manufacturing, it could cause the frame to warp.

Heating above 300 degrees is known as tempering, look it up on google, you'll find a lot of information.
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Old 03-20-08, 12:29 PM   #15
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hey if my mum was heating it up it would be ok

she always burns pizzas
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