Cryogenically treated brake discs
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From: Frustration
Originally Posted by Dembo,Oct 6 2008, 10:04 AM
I thought about having my cracked disks cryogenically frozen in the hope that in the future the science would exist to repair them.
Is that the same thing?
Is that the same thing?
Joined: May 2006
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From: East Yorkshire
Originally Posted by Dembo,Oct 6 2008, 11:04 AM
I thought about having my cracked disks cryogenically frozen in the hope that in the future the science would exist to repair them.
Is that the same thing?
Is that the same thing?
For some reason thats just reminded me of the film demolition man.
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From: Market Harborough, Leics.
Originally Posted by Hypersonik,Oct 6 2008, 01:13 AM
So what they are saying is that it is a type of super quenching.
And what happens when you heat it back up again.....
For other parts - yes, the purpose is obvious and totally logical.
For brakes.....Nah.
The only time we used liquid nitrogen in the manufacture of aircraft was for physically shrinking bolt/rivets to go into undersize holes, not for any propery it might give.
And what happens when you heat it back up again.....
For other parts - yes, the purpose is obvious and totally logical.
For brakes.....Nah.
The only time we used liquid nitrogen in the manufacture of aircraft was for physically shrinking bolt/rivets to go into undersize holes, not for any propery it might give.
You wouldn't get the discs hot enough through braking for the crystal structure of the iron to change again.
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From: Frustration
Originally Posted by lower,Oct 6 2008, 10:57 AM
That cryo treatment should change the metallurgical properties of the Iron, and in a way that would harden the iron and stabilise it dimensionally, so the theory is good.
You wouldn't get the discs hot enough through braking for the crystal structure of the iron to change again.
You wouldn't get the discs hot enough through braking for the crystal structure of the iron to change again.
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From: Market Harborough, Leics.
I would be very, very surprised if you managed to get your discs up to 800 degrees.
My DBA discs came with heat paint on them to indicate what temperature they were at. The heat paint temperature range is 458-630 degrees C and gives an indication of what temperature they're supposed to run at. Admittedly i managed to get the red stripe (630 degrees) to turn white, but i can't believe that they get up to 800 degrees.
The hardness of the disc determines how they wear. The harder the discs are the less they'll wear.
With Ferodos OEM discs wear quite quickly. My DBA discs, which are heat treated, seemed to be wearing a lot more slowly that the OEM discs.
The heat treatment was also to help stabilise the disc dimensionally and create a more uniform grain structure to help prevent it warping when it gets hot. Which, judging by the fact these discs haven't warped or cracked, seems to have worked.
My DBA discs came with heat paint on them to indicate what temperature they were at. The heat paint temperature range is 458-630 degrees C and gives an indication of what temperature they're supposed to run at. Admittedly i managed to get the red stripe (630 degrees) to turn white, but i can't believe that they get up to 800 degrees.
The hardness of the disc determines how they wear. The harder the discs are the less they'll wear.
With Ferodos OEM discs wear quite quickly. My DBA discs, which are heat treated, seemed to be wearing a lot more slowly that the OEM discs.
The heat treatment was also to help stabilise the disc dimensionally and create a more uniform grain structure to help prevent it warping when it gets hot. Which, judging by the fact these discs haven't warped or cracked, seems to have worked.
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From: West Midlands
Originally Posted by lower,Oct 9 2008, 12:40 PM
Personally, i'd recommend the DBA's. There is more to them than just some fancy heat treatment and they are the only discs i haven't cracked or warped.
