New .100" AEB-L Arrived

There are two things happening here. Typically in a strip mill the steel is rolled from a long strip The rolling puts stresses with a 'memory ' of the coil .most of that should be removed by the sub-critical anneal [ stress relief ] if the roll is cut and flattened then HT'd . The other is anisotropic things [ different properties in different directions ] .That would require cross rolling to remove. Off hand I don't know the details of that, though Chuck could do some experiments to get some answers .
 
Alpha Knife Supply said:
We try and cut every piece with the grain.
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Chuck, You may have said before, if so I missed it. What size sheets of AEB-L do you get? Are all sheet so blade material same size? It sounds like cutting with grain would be the way to go, and I expect that's why I don't have too much problem with warp from your AEB-L material. Heck, don't think I've ever used any for any other source. {g}

I just might put a few strips of my AEB-L in the oven for that sub-critical anneal process and see how it does.

Ken H>
 
Some knifemakers have problems with the AEB-L warping, other knifemakers do not have the problems. This has happened with steel from the same batch and with different thicknesses.

If some knifemakers do not have warping with multiple thickness of steel from the same batch and other knifemakers do have warping, the knifemakers are doing something different that is causing the problem. I have a theory, but I'm not ready to tell people my theory because we are still testing. I do not want to cause confusion if my theory is wrong.

Chuck
 
Ken H> said:
What size sheets of AEB-L do you get?
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I forgot to answer your question. We get different widths based on the thickness. The majority is a little over 14" wide. The length also varies based on when we bought the steel. Most are between 24"-48" long.

Chuck
 
Well I'm interested in that. Only AEB-L does this to me off the laser, and I only buy AEB-L from you. At this stage I'm curious what I'm doing that others aren't. The only thing that has come close to acting like this is the reclaimed bandsaw blade 15N20 I've bought from JT.

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It's really not a problem. It straightens easily enough especially at this stage. It certainly doesn't seem to warp any more or less out of the quench than anything else I've used.
 
kuraki said:
Well I'm interested in that. Only AEB-L does this to me off the laser, and I only buy AEB-L from you. At this stage I'm curious what I'm doing that others aren't. The only thing that has come close to acting like this is the reclaimed bandsaw blade 15N20 I've bought from JT.

QpGpnqg.jpg

zNIFJTB.jpg


It's really not a problem. It straightens easily enough especially at this stage. It certainly doesn't seem to warp any more or less out of the quench than anything else I've used.
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You have to orientate the sheet to true north, that one was facing west.

Hoss
 
Alpha Knife Supply said:
Not all AEB-L warps during heat treating. We've been testing AEB-L to determine the core issue of warping. I will post the results when we are finished.The following information was verified this morning. The thickest 15N20 their new mill can roll is .236". The thickest AEB-L is .196" which is what we purchased.

Chuck
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Is there any chance that you might be able to get a batch of thick 15n20? I know that I would buy a fair amount.
 
kuraki said:
Well I'm interested in that. Only AEB-L does this to me off the laser, and I only buy AEB-L from you. At this stage I'm curious what I'm doing that others aren't. The only thing that has come close to acting like this is the reclaimed bandsaw blade 15N20 I've bought from JT.

QpGpnqg.jpg

zNIFJTB.jpg


It's really not a problem. It straightens easily enough especially at this stage. It certainly doesn't seem to warp any more or less out of the quench than anything else I've used.
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To me it looks like your blades are cut with the grain. That’s the direction that allways bows on me. If I cut across the grain then it does not bow. And I think this might be why some people get warping and others do not. I guess we could just ask chuck if all the AEBL he sells has the grain going in the long direction?
 
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But why only this alloy? I cut everything with the grain whenever possible.
 
kuraki said:
But why only this alloy? I cut everything with the grain whenever possible.
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That I dont know. When I talked to the uddaholm guys at blade thy kept talking about the coils. I got the general impression from them that everything is coiled during processing. As it goes from roller to roller. That’s why he told me the minimum for a custom thickness is 4-5,000lbs. Because that’s one roll. And thy said thy thy would pull it out of the production line at the thickness I requested. So I’m not really sure I know chuck says he gets his from stock befor it’s rolled, which could very well be corect. But I’m wondering if it was coiled befor it got to the finishing stage. And thy cut his befor thy coil it back up.
 
It's always the details that kill you . In one way that describes my career . Check every step, don't miss one . I wish I could travel like the old days !
 
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