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"as I tend to view tempering temperature as the target and hardness values as a by product". That is a new one.

Thank you for the clarification on the needle penetrator. I see your point, and am not arguing it, just discussing, so I appreciate the help in understanding what is going on there. I am familiar with secondary hardening steels....but wasn't considering those even in the discussion. Just low...

I love working with Ernie. He did an AMAZING job with detail on one of my marks. I also use a homemade machine....but I don't get the pro look from the personalizer. It looks good...but not like the personalizer does. Also....the personalizer uses A/C as well...which darkens your mark. I...

Doug, thanks for all that you do fighting for our God given rights...secured by our Constitution.

Good looking blade you have there!!! How are you liking the O7 (1.2519)? I am in LOVE with the stuff! It won't get screaming sharp like 1095 or White steel, but it sure does behave very much like Blue steel. Did I say I loved it?

Thank you, Doug! Happy New year to you and everyone here!!!!

Me2...that is what I was told. I don't know enough to argue that...really! But here is what is swimming thru my head....it seems often I hear about a carbide bearing simple steel giving crazy high readings. I understand that carbides are small.....but Cr carbides can be quite large...VERY...

Warren, you aint no "Hack"!! KDX...looking good!!!!

Ahhh.....salts. That's right I forget about salts. I dream about them....but then reality sets in. I take back what I said about hamon activity and clay being the only way I know to get great activity. It can be done with the right geometry/temp/time/quench. "Look, ma. No clay!"

I sure didn't think that 1095 was a "hit n miss" steel for hamons. ??? It is VERY shallow hardening. Works pretty darn well from what I have seen. Spectacular hamons on 1095. 1095 can be a difficult steel to heat treat period....so maybe that is what Mr Caffrey was getting at. You...

I think the MAIN concern with using 1475F vs higher aust temps is RA. Retained Austenite. When you stick with 1475F, the RA is minimal, and you put just enough carbon in solution to fully harden the matrix, and leaving the rest as vanadium carbides. As Karl mentioned elsewhere.....it's like...

Yep, you got it. If you are doing a water quench....make sure it is brine and NOT straight water. 10% salt solution. I would make sure there are no stress risers to cause a problem, polish it up well to 400 minimum (220 absolute min) with the scratches going lengthwise. Also using a brine...

Although I was using 1080+ (formulations between the two steels varying slightly), my experience was the same.....good solid hardening line....but not a "hamon". WONDERFUL steel.

60 would be great.

"I am following protocols set forth by Ed Fowler" -"Well that explains it all" Hilarious! Too funny! Here we ago....yet again.....

If it is carbon steel, the Mf is around a 100F, or even 200F, so any cooling below that does nothing, even if it is full cryo like LRB mentioned. Steels that are alloyed heavily have Mf's below 0F, and benefit from cryo. And he also mentioned that multiple quenching is not advisable during...

Uh,huh....Nicholson files. And you said it yourself...some of the cut pattern looks deeper than others. Probably a Mexico made Nicholson file...or a Brazil made Nicholson file. Junk. If you use Nicholson, it should be USA made...and that limits you to old files or NOS. If you cant' get...

I think I finally understand what you are asking. Emphasis on "I think". You are asking if your knife should have a full flat grind or a "saber" grind. That is up to you. A FFG is what I prefer always. Yes, from the spine down to the edge, forming a letter "V". If you still need to heat...

Because you have "three days" (I like your exaggeration) to get under the PN, I don't think it matters much which oil...just don't use nasty motor oils. At what point does quenching stainless in oil cause a problem...as in too much stress and micro cracking? Why bother.....when the PN is the...

IIRC from another forum.....1084 is the steel he is using.