I posted this in another thread, but thought I'd put it here in case anyone else experiences this. I recently made a blade from 1095 and it developed a weirdness in the steel that I can only describe as "clouds".
It's almost like an auto-Hamon in the 1095, but lacking in definition. It won't sand out and seems to get bigger at finer grits. So that one will go sit on the bench for a while as I figure out what to do with it. I may just scrap it and replace it. If anyone can shed some light on this phenomenon, I would appreciate it.
For some strange reason, the forum is not giving me the opportunity to add photos to this post. There is one photo in this post at the end of page 2.
I will try and get the other photo posted later.
Joshua States
www.dosgatosforge.com
https://www.youtube.com/channel/UCdJMFMqnbLYqv965xd64vYg
https://www.facebook.com/dos.gatos.71
Also on Instagram and Facebook as J.States Bladesmith
“So I'm lightin' out for the territory, ahead of the scared and the weak and the mean spirited, because Aunt Sally is fixin’ to adopt me and civilize me, and I can't stand it. I've been there before.â€
Without first hand experience with the blade, all I can say is that decarb and mixed pearlite structures are the most common causes of cloud like effects. Just did a 1075 blade that had quite a bit of the effect. You may need to take quite a bit away, but if you can grind it away, it is probably decarb.
"One test is worth 1000 'expert' opinions" Riehle Testing Machines Co.
Thanks for the response Kevin. I'll take it back to the grinder and see what happens. It didn't show up until I got to 400 grit and it really became visible at 600. I even took it back to 320, but that didn't help.
Is it only me or is the Full Editor not providing the photo uplinks anymore?
Joshua States
www.dosgatosforge.com
https://www.youtube.com/channel/UCdJMFMqnbLYqv965xd64vYg
https://www.facebook.com/dos.gatos.71
Also on Instagram and Facebook as J.States Bladesmith
“So I'm lightin' out for the territory, ahead of the scared and the weak and the mean spirited, because Aunt Sally is fixin’ to adopt me and civilize me, and I can't stand it. I've been there before.â€
Kevin, I was just offered a different theory and I would very much like to hear what you think about it. It has to do with normalization and refining grain in shallow hardening steels. Is it possible to refine the grain too much? Can the grain get so fine that you move the nose of the curve closer to the T=0 secs axis on the graph? This would produce very shallow to no hardening causing auto-Hamon to appear as you grind through the blade.
Joshua States
www.dosgatosforge.com
https://www.youtube.com/channel/UCdJMFMqnbLYqv965xd64vYg
https://www.facebook.com/dos.gatos.71
Also on Instagram and Facebook as J.States Bladesmith
“So I'm lightin' out for the territory, ahead of the scared and the weak and the mean spirited, because Aunt Sally is fixin’ to adopt me and civilize me, and I can't stand it. I've been there before.â€
Yes that is very possible. Finer grain = faster quench requirements in simple steels.
"One test is worth 1000 'expert' opinions" Riehle Testing Machines Co.
