Cryogenically treating parts yourself at home?
TECH Enthusiast
Joined: Mar 2005
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From: Dallas
cudaeh, you shouldn't be worried, it's so tiny it's not even noticeable.
Besides, you can't hurt the stuff if you try anyways with the process.
Report back, and if you can get a hold of it, try and see if you can get a hardness test performed before and after. That will confirm or deny any change in material properties.
Besides, you can't hurt the stuff if you try anyways with the process.
Report back, and if you can get a hold of it, try and see if you can get a hardness test performed before and after. That will confirm or deny any change in material properties.
Thread Starter
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From: michigan; where even our licens plates rust
I have access to a metallurgist that owes me a favor.
I will cut a few blanks of A-36 (mild steel) and treat them as well for her to test.
cudaeh, you shouldn't be worried, it's so tiny it's not even noticeable.
Besides, you can't hurt the stuff if you try anyways with the process.
Report back, and if you can get a hold of it, try and see if you can get a hardness test performed before and after. That will confirm or deny any change in material properties.
Besides, you can't hurt the stuff if you try anyways with the process.
Report back, and if you can get a hold of it, try and see if you can get a hardness test performed before and after. That will confirm or deny any change in material properties.
On The Tree
Joined: Jan 2008
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From: Where you least expect me
LOTS of engineering effort has been wasted (and lots of unnecessary work created) over the centuries because someone neglected to consider thermal expansion...
You'd BETTER know about thermal expansion if you want to make power with an aluminum engine...
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Joined: Jun 2002
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From: Upstate NY
One of the lesser known uses for sub-zero treating is for steel gage parts. Hardened steel gage blocks (Jo-blocks) are sized and certified to a few millionths of an inch. If they are not sub-zero treated, the retained austenite slowly changes to martensite which causes the parts to grow ever so slightly. Over a period of months/years they may grow enough to get out of tolerance.
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From: Dallas
Thermal expansion is negated by the fact that the part will return to original size as the temperature is brought back to normalcy.
There would be distortion however due to the grain size change (but at dry ice temps, i'm curious of how much change, so I can't speak for certainties, only generalities as it's a rather high "cold" temp).
3.4 Camaro, I'll call you this weekend with a status update lol, you wont like it.
There would be distortion however due to the grain size change (but at dry ice temps, i'm curious of how much change, so I can't speak for certainties, only generalities as it's a rather high "cold" temp).
3.4 Camaro, I'll call you this weekend with a status update lol, you wont like it.
Staging Lane
Joined: Apr 2008
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i am a bricklayer i build high temp furnaces in steel mills and in melt shops most of the shops that are doing high quality forging and heat treating use quench tanks wich when the part is at its peak temp thep pill it out and quench it in different products many of them special oils.i was told that the cyro process will eventually damage these parts that have been in a quench tank.
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Verdad Gallardo TECH Fanatic
Joined: Jun 2002
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From: Upstate NY
i am a bricklayer i build high temp furnaces in steel mills and in melt shops most of the shops that are doing high quality forging and heat treating use quench tanks wich when the part is at its peak temp thep pill it out and quench it in different products many of them special oils.i was told that the cyro process will eventually damage these parts that have been in a quench tank.
Jon
TECH Fanatic
Joined: Jun 2002
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From: Upstate NY
You might want to ask the crank manufacturers about annealing, normalizing, tempering, nitriding and cryo treating of their cranks. I'm sure they can give you a more accurate answer than I did.
I'm not a bricklayer, but we have been involved in machining many grades of steel for many decades. I don't recall machining any steel immediately after "quenching" without some other heat treating process. When I visit my heat treater I often see raw steel forgings direct from the forging house which are being further processed prior to machining. I guess I just am seeing the 5%.
Jon
Staging Lane
Joined: Apr 2008
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one of the crankshaft places i work is elwood national crank you can do a search and it will show you the company. yes they do run cranks through anneal furnaces after they are quenched but right from there they do go to machine.annealing is usally a lower form of heat that soaks the metal kind of like forging but they do not run the crank through the press after it is annealed.
TECH Fanatic
Joined: Jun 2002
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From: Upstate NY
one of the crankshaft places i work is elwood national crank you can do a search and it will show you the company. yes they do run cranks through anneal furnaces after they are quenched but right from there they do go to machine.annealing is usally a lower form of heat that soaks the metal kind of like forging but they do not run the crank through the press after it is annealed.
I spoke up because you were misleading folks with your claims. I don't think you want to get the reputation as an internet "expert" who posts incorrect information and causes the BS flag to appear. There are more than enough of those folks already.
Jon
