Latest development in the high performance 52100 blade

ZDP-189 said:
The term or word band was a bad choice, zone would maybe fit better. I would love to take her apart and see what happened and how strong and tough she is. I don't want to destroy her until I have a few like her or better and we have Rex back in the Lab.

I most sincerely thank you for your kind comments and today feel a stronger sense of community building.
Thanks Friends

The log on stuff is Dan's, this message was written by
Ed Fowler, as soon as I can figure how to get back to my own name I will do so.
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Ooops, sorry Ed. I forgot to log out!

Jeff can sort it out for you.
 
Hmmmmm, Interesting thread. I don't know chit from cheyenne about all this, but if Keven, Mete, Sean and a few others keep talking, I just might learn something. Plus, all this talk about super plasticity is just in time for the Fantastic 4 movie release. :D
 
Anthony Chaney said:
... but if Keven, Mete, Sean ...
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OooooNoooo, I don't compare to those boys. That is like comparing the Pyramids to linkin' logs. ;) And yes, I am the linkin' logs. :D
 
mete said:
Super plasticity starts like this __ and ends up like this ____________________ before it breaks !! .....Jose, the ingot mold is a long tube closed at the bottom so the cooling occurs from the outside to center all along the length.The alloying elements are very soluble in the liquid steel but a lot less soluble in the solid state. Therefore the center of the ingot [the whole length] is richer in alloying elements as the elements are driven toward the center. Banding while present in the simple steels can cause serious problems in complex alloys like tool steels especially if the ingot has not been worked down to thinner sections. The fix is to make steel like the Crucible CPM steels .
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this is the way it use to be done with pig iron when it was smelted up here.
in the 1800's to erly 1900's :)
 

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Laredo7mm said:
OooooNoooo, I don't compare to those boys. That is like comparing the Pyramids to linkin' logs. ;) And yes, I am the linkin' logs. :D
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President Lincoln slowly turns in his crypt........:D
 
Thanks for the replies guys. So it forms more or less like a two flavor popsicle with the harder steel on the outside? Like the earth with an iron shell instead of a core? The material that gets pushed to the inside is denser and softer but contains hard carbide aggregate?
 
It's not a two part thing .The changes are more gradual .It depends on the alloying elements and cooling rates .I tools steels you get , especially in large sizes, what are called 'massive carbides' .These very large carbides make for very difficult machining and grinding. In addition since the center is not homogeneous causes heat treating problems. We had a customer that made a donut shaped die and wanted to use the left over center section. We advised him not to do it.It exploded into 100 pieces when quenched !!
 
Mete,
Would it have helped to normalize the center a few times with a time period for the thickness before he had quenched the donut?? Just wondering about that.
 
That would be doubtful since the center was so far from being homogeneous........As I mentioned the banding problem comes from differences in solubility in liquid iron vs solid iron. ...Here's a parallel situation .If you take apple cider and let it ferment you then have a water and alcohol mixture. If you then freeze it , say a gallon of cider in a plastic jug, you will end up with frozen cider but the center will be liquid with high alcohol content .Alcohol being less soluble in solid water [ice] than liquid water.[let Mother Nature do the distilling !!]
 
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