I'm a fledgling knifemaker ~1 year experience, and a guy I work with wanted me to try, so I Gave it a go.
A few things I would like to do different next time: better (ckeaner) transitions from handle to blade portion. Remember to use the checkering file on the proximal spine BRFORE you harden it... cant now, its too hard... Probably make the handle skinnier, though the guy who wanted this asked for a larger than normal handle, because HE is larger than normal. Lol
Steel is O-2 started at 4mm thick, final dimensions are right at 1” spine to edge and almost exactly 7mm thick. I had to upset a bit to get the thickness up in order to make the 3.6:1 length : thickness ratio that from my research and reading is the generally preferred ratio. Cube twist with a hot chisel for the long cuts, dremel/cutoff for the side cuts, then adjusted for an ergonomic grip.
Kept a good even heat while forging, rough ground, 2 normalizing cycles, then held at 1475 +/- 15 deg F for about 10 minutes, quenched in 140 F McMaster Carr 9-11 sec oil. Tempered at 360 for 1 hour. From the literature I could find, SHOULD be Rockwell of about 60-61.
Ran up the stones from 1k-3k-8k-12k, flat strop with green Cr2 O3 and shaved to see if it passed the test.
I don’t have a proper contact wheel on a grinder, have a cheap-o 4x36 and a big 4x106 belt grinders. The 36 only has the top tracking (crowned) wheel accessable so that doesnt make for a good hollow grind. But I DO have an old 1950’s Shopsmith with a 2.5” drum sanding attachment that, with a little rocking and patience. gave me a 1/2 decent hollow grind. (I’m on a waiting list for a NorthRidge 2x72 *thumbs up*)
A few things I would like to do different next time: better (ckeaner) transitions from handle to blade portion. Remember to use the checkering file on the proximal spine BRFORE you harden it... cant now, its too hard... Probably make the handle skinnier, though the guy who wanted this asked for a larger than normal handle, because HE is larger than normal. Lol
Steel is O-2 started at 4mm thick, final dimensions are right at 1” spine to edge and almost exactly 7mm thick. I had to upset a bit to get the thickness up in order to make the 3.6:1 length : thickness ratio that from my research and reading is the generally preferred ratio. Cube twist with a hot chisel for the long cuts, dremel/cutoff for the side cuts, then adjusted for an ergonomic grip.
Kept a good even heat while forging, rough ground, 2 normalizing cycles, then held at 1475 +/- 15 deg F for about 10 minutes, quenched in 140 F McMaster Carr 9-11 sec oil. Tempered at 360 for 1 hour. From the literature I could find, SHOULD be Rockwell of about 60-61.
Ran up the stones from 1k-3k-8k-12k, flat strop with green Cr2 O3 and shaved to see if it passed the test.
I don’t have a proper contact wheel on a grinder, have a cheap-o 4x36 and a big 4x106 belt grinders. The 36 only has the top tracking (crowned) wheel accessable so that doesnt make for a good hollow grind. But I DO have an old 1950’s Shopsmith with a 2.5” drum sanding attachment that, with a little rocking and patience. gave me a 1/2 decent hollow grind. (I’m on a waiting list for a NorthRidge 2x72 *thumbs up*)
