From Billet to Sheet - Crucible CPM-S35vn hot rolling at Niagara Specialty Metals

Truly a remarkable and informative thread. Thanks VERY much to Matthew Gregory, nsm and the entire crews at Crucible Steel and Niagara Specialty Metals!

I have one question: do any of y'all object if I share pics/vids from, or link to this thread on my subforum and Facebook page? If you all agree to that, all copyrights and sources will be fully credited and respected.

If y'all are not comfortable with me posting your content on "my" pages, I would still like to discuss this content and "guide" people towards it. If that seems fair to you.
 
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James, as long as Bob is fine with it, and the images and video aren't altered, I don't have a problem with it!
 
Thank you, Matt. I await Bob's "sign off". I just don't want to step on anyone's toes! In terms of copyright or whatever.

In the interest of full disclosure, I use a fair amount of Crucible CPM steel, which I know is rolled out at NSM. I've been working with CPM steels for years... that's not gonna change anytime soon.
 
Very informative thread, thanks for posting!!


Pablo
PS: Also a S35VN user
 
James,
No problem.
Bob Shabala
 
@Bob, is the final rolling temperature ~1450'f? Do you finish roll most cpm alloys at this temperature?

Hoss
 
Hi Hoss,
Yes, most of the CPM alloys for the knife industry are finish rolled at 1450F.
Bob
 
Pretty cool. Bob, that initial rolling temp is about the same as us pounders of carbon steel would use for forge welding. At what temperature would you have to start worrying about perhaps "undoing" what the PM process does?
 
JDM61,
I think another 100 degrees and we would have some issues associated with overheating.
Bob
 
After watching that, I'm not as hesitant to put a hammer to the CPM steel. Keep it between 1800F and 2100F for heavier moving(for us bladesmiths, anyway) and 1450F for straightening and planishing.
 
Rick, I recall that Bailey Bradshaw was forging 3V a bit back when he was still making knives. Likewise, Sean McWilliams forged the T440V which, IIRC, is the old name for S60V. My recollection is that it was SLOW going.
Rick Marchand said:
After watching that, I'm not as hesitant to put a hammer to the CPM steel. Keep it between 1800F and 2100F for heavier moving(for us bladesmiths, anyway) and 1450F for straightening and planishing.
Click to expand...
 
I recently forged out some S30V without a problem. Not a whole lot of movement.... 2" wide flat stock into a kukri profile, but I was very cautious during the straightening process and wasn't exactly sure how to normalize/anneal it for coldwork.
 
Guys, I've forged lot's of different high alloy steels. D2, 3v, CPM M4, CPM T15. It's really not that difficult. Of course, having a good power hammer helps.

Bob: Thanks, I found a place that had some O1 round at a very good price. :-) If I ever need some flat stock though, I'll keep you guys in mind.

Matt, they actually did have L6, and, I think, O1, but not in round.


Thanks again for taking the time to post this. Would be great to see more videos of other parts of the process, if that would be possible sometime.
 
Damn that's cool. So glad to see stuff like this being done in America still.

I hope they gave you a free coffee cup.
 
Bringing this back up so that I can link it to a thread in General.

The new forum software won't allow me to fix the video link in the first post of this thread, because there's more than 20 photos in it, and that's against the rules :mad:

So, here it is again:


 
Matthew Gregory said:
Bringing this back up so that I can link it to a thread in General.

The new forum software won't allow me to fix the video link in the first post of this thread, because there's more than 20 photos in it, and that's against the rules :mad:

So, here it is again:


Click to expand...

dont want to brake the rules do we mr necroposter ;)
 
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