Brake pads & rotors - what do you suggest?
November-24th-2004, 10:03 AM
#32
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Join Date: Apr 2004
Location: Michigan
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Honestly, isn't cryo a process in which the part is hardened by introducing more carbon into the surface of the steel, via vapor? By introducing more carbon into the areas between metal grains (interstital zones), the hardness of the material increases.
You could also heat treat rotors via a traditional hardening method - bringing the material up to red hot, and quenching it (submerging in hot oil) to rapidly cool it. This results in small grains, which means that the material will be harder and less prone to wear (but also more brittle overall).
Proper treatment will result in a part that is reasonably hard, but not so brittle that it will crack if a surface flaw develops. There is some engineering in designing a proper heat treating process, but if anyone is curious, I do have the formulas handy.
You could also heat treat rotors via a traditional hardening method - bringing the material up to red hot, and quenching it (submerging in hot oil) to rapidly cool it. This results in small grains, which means that the material will be harder and less prone to wear (but also more brittle overall).
Proper treatment will result in a part that is reasonably hard, but not so brittle that it will crack if a surface flaw develops. There is some engineering in designing a proper heat treating process, but if anyone is curious, I do have the formulas handy.
November-24th-2004, 10:39 AM
#34
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Join Date: Oct 2004
Posts: 17
The big thing to keep in mind, and I am NOT saying these rotors wont hold up, or they are crap. What I am saying is anytime you make something there is a certain flow in the grain or the metals. If you start to drill or remove that metal it affects the structural integrity of the item. Ferrari, Porsche, and other major companies that use slotted of Cross drilled brake use a casting method that the holes are there from day one. Thats the strongest way to get them done.
Cryo Treated brakes are definitly a great thing. The dont prevent the cracks but they can make one a lot less evident. I have seen cryo treated rotors crack, and none cryo ones crack....the noncryo treated are always worst.
Joe
Cryo Treated brakes are definitly a great thing. The dont prevent the cracks but they can make one a lot less evident. I have seen cryo treated rotors crack, and none cryo ones crack....the noncryo treated are always worst.
Joe
November-24th-2004, 12:27 PM
#35
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Join Date: Aug 2002
Location: Tucson, AZ
Posts: 572
Originally Posted by Stueck
i hope you dont mind me being curious this often, but what do you mean by cryogened?
it's part of the heat treat cycle. they bring it up to temp, then bring it down to a really cold temperature in order to increase strength. most metals show increasing strength as it is cooled to a temperature that is as close to absolute zero (-273 Kelvins or -546 degrees celcius) as possible. this is better than just dipping the metal in hot oil or hot water, so they dip it in a very cold substance. since it'll be cost ineffective to go below the temperature of liquid nitrogen, current cryogen technology uses liquid nitrogen. in the end, it increases the life of the rotors and helps it resist warping, cracking, etc. that occurs when you're hard on your brakes. most competitive racing has at least a few people who work with cryogenically treated brakes.
i love my physical chemistry class. we just learned about this last week.
November-24th-2004, 12:30 PM
#36
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Join Date: Aug 2002
Location: Tucson, AZ
Posts: 572
Originally Posted by juddz
Honestly, isn't cryo a process in which the part is hardened by introducing more carbon into the surface of the steel, via vapor? By introducing more carbon into the areas between metal grains (interstital zones), the hardness of the material increases.
You could also heat treat rotors via a traditional hardening method - bringing the material up to red hot, and quenching it (submerging in hot oil) to rapidly cool it. This results in small grains, which means that the material will be harder and less prone to wear (but also more brittle overall).
Proper treatment will result in a part that is reasonably hard, but not so brittle that it will crack if a surface flaw develops. There is some engineering in designing a proper heat treating process, but if anyone is curious, I do have the formulas handy.
You could also heat treat rotors via a traditional hardening method - bringing the material up to red hot, and quenching it (submerging in hot oil) to rapidly cool it. This results in small grains, which means that the material will be harder and less prone to wear (but also more brittle overall).
Proper treatment will result in a part that is reasonably hard, but not so brittle that it will crack if a surface flaw develops. There is some engineering in designing a proper heat treating process, but if anyone is curious, I do have the formulas handy.
November-25th-2004, 12:16 AM
#40
The man behind the mask
Join Date: Oct 2003
Location: Birmingham, AL
Posts: 11,572
his MSP big brake kit is an awesome upgrade for anyone interested in better stopping power!! I plan on getting a set a little later cause Truc and I are going to meet up in Mid-Ohio and run 'em!!
November-25th-2004, 01:37 PM
#41
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Join Date: Apr 2004
Location: Michigan
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Originally Posted by Roddimus Prime
his MSP big brake kit is an awesome upgrade for anyone interested in better stopping power!! I plan on getting a set a little later cause Truc and I are going to meet up in Mid-Ohio and run 'em!!
November-26th-2004, 02:13 PM
#42
Matty's Lead Scrumpet!!
Join Date: Dec 2002
Location: Ok City
Posts: 3,143
Originally Posted by juddz
It's a little off topic, but mid-Ohio would be a great place for a club get together. Not too far from Michigan, a bit of a trek from Alabama and the rest of the deep south, not too far from many eastern states.
