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You may want to do it for other reasons, but there isn't any grain refining going on below about 1400 F in the cycling.

I've been stumped with my fine (4000 grit) water stone for a while now. It gives me fits. I can occasionally get an arm shaving edge off it, but not every time. I am almost certain it has to do with how soft it is. Even the lightest passes are like trying to sharpen with chalk. A thin layer...

Ok, round 4 is done, up to 40 full sharpenings. This time the blade lost 0.008" of width. I changed stones again, going to my Norton 220 waterstone. This is clearly the way to go if efficiency is the goal. I was able to apex the edge (remove the shiny flat from destressing) and go beyond to...

I have been doing some sharpening lately on a specific knife and measuring the loss of steel as I go. I started off sharpening the knife 10 times each session, with destressing the edge by cutting lightly into the stone 4 times and then making 50 passes per side on my 1000 grit King water...

Just a cautionary note on doing research on cold (dry ice) and cryogenic (liquid nitrogen) for knife use. 3 or 4 years ago I did a fair amount of research into it. One thing pointed out in one of the articles (published by a university in Ireland) was people play with different rules and...

Given some of the very high amounts of carbides in some modern steels, say S110V, would it be fair to say there is a sort of corner that gets turned, and the sheer volume of carbide is enough to influence the hardness test? I'm picturing steels with 25 volume percent carbide or more, without...

Are you familiar with the work of Brent Beach on plane blades? What you are doing is somewhat similar, though the reasons are different. He advocates precise angle control, and changing angles witheach finer grit for multiple microbevels, or a faceted edge.

I think microbevel would apply. Can you see each facet?

Mr. Caffrey, after rereading the thread I have a couple of question. What is the mechanism that is involved with grain refinement during the cooling in the quench? Those grain sizes are extremely fine, even finer than those claimed by Ed Fowler and are in fact right off the ASTM scale, which...

Normalize: Heat to 1600 or so for 5 to 10 minutes and air cool. This may or may not be necessary, depending on what condition your steel is in before hardening (as forged, hot rolled, annealed, already hardened, etc.) Heat to 1525 or so and cool in air. Again, this may not be required...

a 19 second oil sounds kinda slow to me, for 1095 anyway.

Those diagrams are handy, but remember the limitations/conditions. They are binary (Fe, C) equilibrium diagrams. Even the trace elements will move things a bit. W and V will take considerably more heat to dissolve, which is why we use them. Also, normalizing and quenching are definitely not...

Ok, I think the link is fixed. Try again and let me know if it (still) doesn't work. Cementite is the carbide in simple 10xx steels. It is what gives 1095 at 58 HRc greater wear resistance than 1060 at the same hardness. (1095 at 58 isn't a hardness I'd recommend, just for the record.)...

https://www.youtube.com/watch?v=lOJHrkh__SQ See if my explanations in that video make sense to anyone other than me. Basically, too much carbon is possible, just as too little is possible. The region around 1450 has cementite and austenite mixed together. The cementite is the stuff...

I'll reply later, when not on my phone.

Are you going for 100% austenite? For the final hardening step of a hypereutectoid steel, that isn't normally recommended. Choosing the temperature is determined by a handful of questions that the maker will need to answer for him/herself.

Yes, quite right. Abrasive resistance. There are several books around. It depends on how deep you want to get into it. Is there someone named Mike that I've accidentally blocked? I don't see replies but mine above. Basically, almost all the alloy carbides increase wear resistance and...

For your examples of 154CM and 1095, what you are seeing is the difference in carbide volume between the 2 steels in both the annealed and hardened condition. 1095 has about 15% carbide in the annealed state, while 154CM has considerably more, though I don't know how much. In the hardened...

I'd think foil would get in the way when quenching an oil or water quenching steel, and there isn't time to take it off unless you're very quick, and not afraid to drop a 1400+ degree blade every now and then.

Very close. Just a couple of minor points. Normalization produces all austenite. For steels with less than 0.8% carbon, such as 1055, the higher temperature removes the final bits of ferrite. Greater than 0.8% C and the final bits of carbide are removed. The temperature that results in all...