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I have been known to buff wispy decarb vigorously to get shiny uneven steel... it looks like there are clouds etched into the surface

Well the problem is the stresses you exert on them... it breaks the steel in macroscopic ways that you can see, and microscopic fractures where you can't see, because it stretches and stretches till it breaks - but it stretched everywhere and microfractured everywhere... As an example there are...

Well two of these are with an icrap, and two are with a 17Mp DSLR all reduced to 1000x1000 max size for the web... those savvy enough can figure it out which is which without looking at the images, those who aren't... well i followed my rules of photographing with a smartphone piece of rubbish...

BTW any new pentax body will work with your old k-mount lenses... and there are adapters available for the m42 mount lenses... but beware the extra megapixels make most of the entry level old zooms feel pedestrian, the old prime lenses are still great though... if you can manual focus... which...

A recent attempt with a new vinyl backdrop... light from a large window and an open sketchpad reflector below the camera, adjusted curves and temperature... I need to calibrate my screen... I welcome crit... In hindsight i should have used a tripod and probably my sharper lens...

I know, but it will save a blade and some person who wants a robust user will like it... ;-)

I am also a pentax guy, and if you are serious about getting started i would say go canon or nikon... The variety of accessories are remarkable and they have more specialised lenses... Mega pixels are a fad though... i would happily buy an older 6-12mp camera and get it over with, i think my...

Convex the other one...

These save a lot of time and effort and steel...

As i understand it, when you cool down slow enough (slower than a simple aircool) from above Critical temp some of the alloying elements will tend to grab the carbon and make and grow large carbides. So you essentially have low carbon steel and carbides. The rest like doug said above

This question was never answered... it could be one of two things... firstly the spine is not martensite and the edge is, so the edge fractures cleanly between the grains, so you can actually sort of see the grainsize... the spine is probably a mix of steel phases or probably carbide...

It is curved, but I think i will make it even more curved next time i make them i bend them back from ricasso and then arc them back to below the level of the ricasso

Thank you! i don’t, i use the lowest temperature heat treat for the steel, and dont cryo it, but still oil quench... and temper it a bit higher... so it will be a few points softer than the knife, they will meet at some point- and the knife is quite a bit thinner, it needs a fighting chance... i...

One of my recent completions a carving set with a newer knife design works a lot better than my old design... what a difference a few years make

Toaster ovens do suck, i filled the tray on the bottom with sand and put a thick plate to shield the top element from the blades... it is better now, i monitor the temps with a multimeter thermocouple clipped to the blades

Decarb... simple carbon decarbs very deep and everything ekse above is valid... but my bet is on decarb

I use it on hunters, and it can get in the way when skinning etc. why i have it is to have a larger radius choil that will still end at 90 degrees to the tip, that is more comfy to my hand when choking up on it and applying force... i feel it is more secure when things get wet. I also use the...

John said it all i think...

It is - i am looking for a hardness tester... and another thermocouple arrangement to clamp at various places along the blade... but there are som many confounding things when measuring temperatures especially high ones, it may just be fairly pointless... but at least then we know

So i used another thermocouple attached to my multimeter, and it agrees within 3 degrees with the thermocouple in the oven... BUT in the meantime i did not have my usual firebrick sheets on the floor, that on top of my floor elements, just the normal ceramic, the knives were probably radiated by...