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#1
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Cryogenic Steel Treatment
Hi Gang,
I finally read a "scientific" article on cryo-treatment of tool steels in the ASME magazine. Normal stress relieving of steel by heat treatment is followed by quenching (cooling) which changes the grain size of the steel (makes the grains smaller with less voids). The steel goes from the Austenetic to the Martensitic phase. Cryo-treatment after quenching further decreases voids and increases the amount and size of carbide nodes in the steel (The carbides give the steel its hardness). The article had microphotographs of the steel samples taken with a scanning electron microscope. Now I finally saw what's going on. The article focused on the work of the owner of a steel treatment operation in Ontario, Canada and the research work done at Louisianna State University. The university professor stated that both the rate of lowering the temperature and the soak time at cryo temp. are different for different composition steels and critical to the end results. He also stated that a mild stess relief (heat treatment) after cryo-treatment is very important and improves the hardness greaty. Finally, both men stated that no amount of cryo-treatment can compensate for a poor stress relief and quench up front. I finally understand why and how this cryo-treatment works. Larry III |
#2
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ART Cryogenically Treated Brake Rotors
Does anyone here have direct experience with the subject brake rotors having approx. one year service? Also, can you post your experience and how the ART rotors have performed in both normal and hard braking conditions ? If you do post, please list the disk pads that you're using. Please be specific, citing milage, quietness, pad life, etc.
Thanks Larry III[U] |
#3
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Poster
Hey Larry, did you get that Jeff Gordon poster? When he won at Dover this weekend, he mentioned his visit to DuPont...
Don
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Cats: Clio, Inky, Sheba, Sparky, Rocky, Cali, Scooter 3 cars: 02 SVT Focus, 2012 Versa...2015 Fiat 500 currently SVX-less 1 wife ("She, who must be obeyed..") "One advantage of being disorderly is that one is constantly making exciting discoveries" |
#4
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Jeff Gordon Poster
Don,
Sorry I did not get it since I am but a lowly "Contractor". A DuPonter got it after it was promised to me. Someday American companies will realize the value of a classless corporate society. I won't live to see it. I'm surprised that they allow us to use the same bathrooms. I guess the extra plumbing would cost too much. Larry III PS: Sorry for venting. |
#5
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different for different composition steels
Does anyone tuning in know the alloy used by Subaru for their rotors? I have a potential source for the "deep freeze" process but if the chemistry of the metal is "critical" I'd need to know what it is.
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#6
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I have been using.....
the zinc plated cross-drilled rotors that dayle at motorsport is offering along with some carbon fiber brake pads and they are awesome. i dont have abs on my svx and the car stops on a dime. when i raced at the memphis motorsports park we had to do some threshold braking and i experienced no fade. in fact i probably raced 6-8 laps a session doing in excess of 120 on the straightaway. at the start of the event my pads were virtually brand new. by the end of the event they were still almost new. i am always getting compliments on how nice the brakes look. just something to think about.
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1994 SVX, true dual Magnaflow exhaust, K&N filter, 17" Enkei RS6 wheels, Bridgestone Potenza RE730 225/45/17 rubber, zinc plated cross-drilled rotors with yellow painted brake calipers. B&M tranny cooler rated at 19,000 GVW. GC springs and Koni strut inserts installed and the car is lowered two inches all the way around!! "Too much fun to drive!" |
#7
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Thanks anyway...
Thanks for trying Larry. < I'm surprised that they allow us to use the same bathrooms> The faculty restroom here at school just got in some fresh toliet paper; sure beats the corn cobs! (this lack of education funding is pathetic...)
Don
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Cats: Clio, Inky, Sheba, Sparky, Rocky, Cali, Scooter 3 cars: 02 SVT Focus, 2012 Versa...2015 Fiat 500 currently SVX-less 1 wife ("She, who must be obeyed..") "One advantage of being disorderly is that one is constantly making exciting discoveries" |
#8
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<<sure beats the corn cobs! >>
Yeah, sure is a bummer since they started charging money for the Sears catalogue. By the way, this cryo treatment stuff really is interesting. How does it stack up "costwise" versus viagra?
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Randy Johnson 3rd Registered Member 02-21-2001 First Member to Reach 10,000 Posts First to arrive at the very first Reading Meet Subaru Ambassador 1992 SVX PPG Pace Car Replica 110+k 1993 White Impreza L 240+K miles 2001 Legacy Outback Limited Sedan 250+K miles 2013 Deep Indigo Pearl Legacy 3.6R 49+K miles "Reading is my favorite Holiday" Mike Davis -- at Reading VI |
#9
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Viagra
Randy,
<<<By the way, this cryo treatment stuff really is interesting. How does it stack up "costwise" versus viagra? >>> With the cryo-treated rotors I can go from 100mph to 0mph at least 5 times per hour. With Viagra I can go from 100mph to 0 mph at least once per day. It all depends on the kind of anti-squeek gel used on the back of the pads. And, I don't even want to know what kind of gel & pads that you're using !! Larry III PS: I may not be as good as I once was, but I'm as good once, as I ever was. |
#10
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Re: Viagra
Quote:
So anyhow, this old bull and this young bull are walking along...
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Pull my finger! |
#11
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once a knight is enough?
He offered his honor, she honored his offer and all night long it was honor and offer.
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#12
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Re: Re: Viagra
Quote:
__________________
Randy Johnson 3rd Registered Member 02-21-2001 First Member to Reach 10,000 Posts First to arrive at the very first Reading Meet Subaru Ambassador 1992 SVX PPG Pace Car Replica 110+k 1993 White Impreza L 240+K miles 2001 Legacy Outback Limited Sedan 250+K miles 2013 Deep Indigo Pearl Legacy 3.6R 49+K miles "Reading is my favorite Holiday" Mike Davis -- at Reading VI |
#13
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It was honor and offer
Honum and offum is an alternative labor of love....especially for those who can't put their backs into it...
Don
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Cats: Clio, Inky, Sheba, Sparky, Rocky, Cali, Scooter 3 cars: 02 SVT Focus, 2012 Versa...2015 Fiat 500 currently SVX-less 1 wife ("She, who must be obeyed..") "One advantage of being disorderly is that one is constantly making exciting discoveries" |
#14
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Re: Cryogenic Steel Treatment
LarryIII,
Do you still have that article? I'd be interested in where that steel treatment operation is located in Ontario, Canada. I'm going to be picking up a pair of front rotors from AutoZone ($60.99 ea), and I wanted to cryo treat them before I mount them on the car. So far, I've only been able to find one place nearby that will do it, and they quoted $2.93CDN/pound for the deep freeze. I'd wanted to find out whether that was a fair price or not, if I had someone else local I can compare it to. VK Quote:
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