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Luong La
United States
Registrace 15. 10. 2009
O1 64rc 3 DPS (6 Degrees Inclusive) Edge Test
BluntCut MetalWorks 20240426
Data Gathering: NTGOP1
O1 64rc 3 DPS (6 degrees inclusive) Edge Test
Data Gathering: NTGOP1
O1 64rc 3 DPS (6 degrees inclusive) Edge Test
zhlédnutí: 307
Video
64rc O1 20dps Edge Jack Hammering Test
zhlédnutí 166Před 4 měsíci
BluntCut MetalWorks 20240426 Data Gathering: NTGOP1 O1 64rc 20dps 0.025" BET edge jack hammering : Douglas Fir, Rosewood, Verawood, thin aluminum tube, beef rib bone,16D nail, 6mm dia mild steel rod, 4" thick concrete
Good All Around 15dps Bolo Edge
zhlédnutí 189Před 4 měsíci
BluntCut MetalWorks 20240425 Data Gathering: NTGOP1 Consider as good all around edge for outdoor activities CruforgeV 62.5rc bolo, 0.25" thick Sharpened ~15dps, 0.014" BET
Light Duty Jack Hammering Concrete
zhlédnutí 89Před 4 měsíci
BluntCut MetalWorks 20240422 Data Gathering: NTGOP1 Light duty jack hammering my decommissioned chopper testing setup using 64rc O1 bits Result: JH concrete into chunks and it was fun
64rc O1 Axes Chop Blue Gum Tree Trunk
zhlédnutí 393Před 4 měsíci
BluntCut MetalWorks 20240416 Data Gathering: NTGOP1 64rc O1 Axes Chop seasoned blue gum wood 15 degrees bevel, sharpened edge ~30 degrees 17 degrees bevel, " Result: Yay finally(after 10 tries) succeeded weld axe bit to head and passed the chop tests!
Merganser 1095 Axe Clears Trail
zhlédnutí 81Před 5 měsíci
BluntCut MetalWorks 20240314 Data Gathering: NTGOP1 Trail clearing(Blue Gum branches) with a thin 63.5rc 1095 axe Result: Yay
64rc O1 Axe Chops Seasoned Blue Gum
zhlédnutí 193Před 6 měsíci
BluntCut MetalWorks 20240307 Data Gathering: NTGOP1 64rc O1 Axe Chops seasoned blue gum wood 15 degrees bevel, sharpened edge ~30 degrees Oops forgot to turn on the microphone. Result: successfully and an annoyed weld failure shorten my workout :)
Bolo 62.5rc CruforgeV - Trail Clearing
zhlédnutí 389Před 6 měsíci
BluntCut MetalWorks 20240302 Data Gathering: NTGOP1 Trail clearing(Blue Gum branches) with a thin CruforgeV 62.5rc bolo. Sharpened ~15dps, 0.008"/.2mm BET Too bad, camera shutoff 15minutes too soon. One small section of edge at belly wave/rippled. Result: Fun
63RC ApexUltra Axe with Sub 12 Degrees Edge Bevel and 30 Degrees Micro Cutting Edge
zhlédnutí 241Před 6 měsíci
BluntCut MetalWorks 20240301 Data Gathering: NTGOP1 Testing hardening process/research using very thin axe edge. Steel: ApexUltra 63hrc Edge: Sub 12degrees Edge Bevel, ~30 degrees Micro Cutting Edge Chop: Blue Gum (Eucalyptus) - green, partial & fully dried Result: Passed
63rc 1095 and 61.5rc O1 Axes Chop Green Fallen Eucalyptus
zhlédnutí 917Před 6 měsíci
BluntCut MetalWorks 20240215 Data Gathering: NTGOP1 Applied & Validate Impact Toughness physics using Axe chop/shock load. Chop: Green fallen Eucalyptus Result: Success
Destruction 1095 Axe and Machete 16 and 15 Degrees Edge Bevel
zhlédnutí 94Před 7 měsíci
BluntCut MetalWorks 20240210f Data Gathering: NTGOP1 Test 1095 steel limits via excessively thin edge bevel 64rc 1095 machete - 15 degrees edge bevel (via bevel gauge) 62.5rc 1095 felling axe - 16 degrees edge bevel
O1 61.5rc 1095 62.5rc Axes 18 Degrees Bevel
zhlédnutí 107Před 7 měsíci
BluntCut MetalWorks 20240207 Data Gathering: NTGOP1 Applied & Validate Impact Toughness physics using Axe chop/shock load. Chop: 2x4 and Partially dried Eucalyptus Result: Confirmed/Passed.
Not 1095 Axes Adventure
zhlédnutí 101Před 7 měsíci
BluntCut MetalWorks 20240201 Bought 1095 axes from Ebay & Amazon to put BCMW harden process onto them. Sure wish they are actually made from 1095 steel :(
1095 Felling Axe 18 Degrees Bevel Gauge Test
zhlédnutí 154Před 7 měsíci
BluntCut MetalWorks 20240130 Data Gathering: NTGOP1 Impact toughness test for 1095 steel felling axe, with ~18 degrees bevel gauge and 14-15 DPS edge, chops partially dried eucalyptus log *note: 60rc file skated the edge but failure behavior indicated low strength so rather than expected 62rc, it probably is close to 60rc hardness. Result: Edge severely rippled/bent.
Square-Notched Impact Toughness Control vs BCMW - *18 minutes talk*
zhlédnutí 73Před 8 měsíci
BluntCut MetalWorks 20231220 Data Gathering: NTGOP1 Impact toughness test for notched specimen via vertical impactor Steels: 1095, 8670, O1
20231021 ASP67rc (10V class) Charpy Toughness Test
zhlédnutí 119Před 10 měsíci
20231021 ASP67rc (10V class) Charpy Toughness Test
52100 61rc Hatchet 15dps Edge Normal Usage Verified
zhlédnutí 82Před rokem
52100 61rc Hatchet 15dps Edge Normal Usage Verified
Hatchet 52100 61rc Destruction Chopping Test
zhlédnutí 99Před rokem
Hatchet 52100 61rc Destruction Chopping Test
1095 63rc Notched Impact Toughness Test
zhlédnutí 91Před rokem
1095 63rc Notched Impact Toughness Test
52100 And 10V Choppers Visit Eucalytus Dead Fall
zhlédnutí 208Před rokem
52100 And 10V Choppers Visit Eucalytus Dead Fall
1095 62rc Knife Edge Stability and Wear Resistance Tests
zhlédnutí 102Před rokem
1095 62rc Knife Edge Stability and Wear Resistance Tests
1095 Toughness Test via Cuting 16mm Diameter Mild Steel Rod
zhlédnutí 156Před rokem
1095 Toughness Test via Cuting 16mm Diameter Mild Steel Rod
There's nothing wrong with A2 if you don't mind a little surface rust. It's an underrated steel in my opinion. I like it as a hobby knife maker because it's pretty stable during heat treat and isn't too hard to finish.
I am a little late to this video LOL however, this is a fantastic video. Great explanations and you have a magnificent collection! Great job!
i mentioned you in a popular KnifeTubers channel. I hope there are others who are interested in your cutlery prowess.
Appreciated!
U are an excellent blade steel tester, u have so many different types of products that u use to test the edge retention. Great job, thanks for the info and video.
Thanks
Awesome results. I’m always dumb and think the spec sheets actually have the real max hardness listed
Make one wonder about their company metallurgists heat treating ability eh ;)
Would it be possible to grind some weight off that head, thinning it out something like the Rinaldi heads so that your good steel can cut more chunks a little easier? You are one persistent and determined man. Is your plan to cut through that trunk?
Extra weight and chips removal geometry are critical elements for fast chopping this hardwood. Extra thin upper cheek promotes deeper penetration hence harder on the thin edge and not enough deflection to bounce/kick chips away. I did thought about doing a big log challenge... maybe at a later time.
I spent 10 years chopping eucalyptus in my backyard with different axes, hatchets, and machetes. That's the sharpest axe I've ever seen in my life.
Thanks. It was a little un-nerving when swinging fast, edge seems too eager to go beyond intended depth :)
I never thought of the edge deflecting and having that hollow ground effect. Pushing things to the extreme seems to be when these funny little issues present themselves. Removing the burr sounds like a nightmare with a zero grind of that angle even without deflection.
LOL - the first 2 times of wired-edge, they look perfect and were easily removed by bending side-to-side with finger; however edge below already concaved. At time, these attempts feel 'futile'
Love that blade profile. 😍
I like it too, a few of these blades/blanks are waiting for next few sequences.
Love the video! My brother got into forging a few years ago and I bought him some stock of 52100 and O1. I think he’s always questioned what good O1 is/can be. I’ll have him start watching your videos!
52100 is much easier to ht (even blind folded :D), O1 easier to screw-up but can exceed best 52100
Wicked thin monster ❤
Thanks
Explaining how it behaved on the plate was wild. Great stuff, like always!
Edge deflection always at-play when chasing either ultra-thin angle or ultra-keen edge when shaping/sharpening with plate abrasive.
I love videos like these man. You put out so much excellent information.
Oh man chasing a wire edge on a knife like that sounds mind melting. Again, providing excellent information for the community.
I need to go forth with another experiment, thus reason for not zero-ffg again but settled for 3 dps instead was aim for 2.6 dps.
So far, what combination of steel, rc hardness, and edge geometry has gotten you the thinnest yet durable edge?
Well, thus far O1 around 64rc well suited for/if this pursuit ...
Interesting!!
How do you get it that hard?
10v can yields up to 69.6rc AQ, hence 66.5rc isn't is definitely within normal hardness. Thanks.
Very clever test rig.
Thanks
When he did that test for ripley the bar was probably iron not modern steel
Well, test samples/specimens are still displaying somewhere, so EDS them to know however nobody probably care...
Excellent information! Thank you very much! I am looking at an n690 fixed blade for ocean swimming/diving and wasn't sure about the stainlessness of n690, this vide9 helped very much, subbed!
Hey cool - swimming/diving sounds really fun, water temp? I was an ocean swimmer for 15 years, still can swim but toes & fingers hate me when water temp below 20c/68f :)
I just swept(20240427 15:01) the concrete floor - saw a deep slanted gash. Aha, edge chipped when it broke through 4" thick concrete block and plywood, edge slammed into shop floor at a bad angle.
When watching this clip I think of Thach Sanh's ax in the fairy history. Good work !
Thanks. Hèn chi cái búa nầy nặng quá chừng, chỉ có Thạch Sanh bửa nổi thôi ;)
Great design and performance 👏 👏
Thanks
Hi my friend would you sell any of your knives
I take my hat off to you for the creative and real world relevancy of your testing. 👍👍
Thanks. Sciences must apply, otherwise voodoo/delusional
Hello my friend would you sell any of your knives
Thanks for asking, For the last 3 years - I/BCMW mostly stopped selling/listing knives to general public. Occasional sales are still happening for those following my/BCMW works.
Love the shin guards. 👍I assume you didn't want to test the edge with accidental bone contact 😉
Right! Also I think - chainmail sock alone won't be that helpful minimize the damage from an axe strike - impact force is too high, hence cushion is required to enlarge the contact area (thus much lower psi).
💪💪 Good work man!
Thanks
Thank you. I’ll definitely try that. A clear and simple guide and explanation. Much appreciated.
What a useful exercise (for the health and public good). But at the same time we can see that a good tool will save a lot of energy. Your welded axe blade cuts through wood like butter, that would be difficult to achieve with the original blade. As usual you look very healthy and happy.
Thanks. Original blade has 60 degrees cutting edge and 45 degrees bevel, thus hardly penetrate and re-bounce energy hurt arm & shoulder :) It was fun chopping stuff and increased my stamina at swinging heavy axe.
That penetration on unbraced limbs is impressive. 👍
Thanks. It was fun chopping and probably will clear the stream later when it dried up
Lightsabre!
Yup, it is nifty thin axe bit and geometry. I was quite gentle with delimbing swings.
Agreed.
A double bit tazzie would be cool
Sure it would... I've a double bit head (I cutoff the bits), will make this one when time permits
Looks for the visitors behind at the 10:14
See previous video - cruforgev trail clearing - 2+1 persons crossed at that trail section. There are still a large branch around thigh high blocks the path. It is almost dried now, I plan to buck that log and 3-4 others closer to the ground later on
Needs a rex 121 khukhri lol
Sure, a 8+mm thick rex121 69+rc would works in the khukri shape but wouldn't work as an axe bit
@@BluntCutMetalWorks one knot and a chunk is gone
@@adanma17 Khukri edge geometry is very stout, it is more of a smasher than cutter. rex121 axe bit this thin would fail in 1 swing :)
Who did not at the 7:11 mark? 😢
Nod to an ultra trail runner walks his dog
Niolox is crazy. It's very corrosion resistant but has a lot of durability for a stainless steel.
Was that with a microbevel? Or straight bevel to cutting edge?
It has 30 degrees micro-bevel (cutting edge). If chopping pine or douglasfir (soft log), 15 degrees would be fine but blue gum is 5 times harder hence need 30* micro. For a normal 58-60rc axe with 15* bevel and micro like this, edge will mangle badly when chopping blue gum (~2400 in janka hardness, note: white pine janka is 460).
@@BluntCutMetalWorks Nice work, so salt forging seems to be better for several types of steel...cool
@@8thsinner Not sure what you meant by salt forging? I like to forge but don't have a facility for that - ideally an isolated location (way away from ppl) with 50Kg power hammer... So, my research is mostly stock removal and harden using ht oven.
@@BluntCutMetalWorks I figured this is what you meant when you said in another comment that you're using unconventional systems. Never mind.
@@8thsinner BCMW hardening process takes 1 to 30 days (currently around 2 days, est 50-70% from optimal) vs conventional ht takes 5 hrs. BCMW process in production will takes 2-3 hrs. Crystal Science/physics is elegantly simple but conventional metallurgy is an empirical/stochastic art.
👍👍
Well damn. That was pretty impressive.
Thanks.
@@BluntCutMetalWorks o1 isn't suppose to do that
@@huckstirred7112 Right on, O1 is very brittle - esp at 60+rc - when ht using conventional/industry protocol.
I think you are the only dude in CZcams that knows how to chop w/ machete. Hope that you use a file to sharpen the tool in the field...
Thanks. I sharpen with diamond plate, although a AlO stone would be good as well. This blade is 62.5rc which is way harder than most file on the market.
The penetrative on the seasoned blue gum was impressive. 👍
Blue gum heartwood is sure hard - acts similar to dried Honduran rosewood. Pleasantly surprised this bolo edge didn't blew out large crescent shape chips.
You certainly gave yourself and the Bolo a solid workout. 👍
A bonus - I got a few 'thanks' from ppl for opened up the trail
I still don’t understand how welding the piece to the axe don’t affect the heat treat. When I weld hardened pieces of steel to normal steel it always breaks near the weld. And it get really hot even from small tack which I assumed would affect the heat treat. How do you weld it?
Wrapped the bit edge with very wet folded paper towel will keep the edge from over-heating. No problem touching the edge with fingers during and right after weld.
@@BluntCutMetalWorks ok i get it , thanks
Would be interestin to re-heat treat one of the Richtig knives to see how much better you can do with his steel. Make the Richtig knife of legend.
Very interesting
Wonderful...what's the temp you quenched at and what did you use for quenching?
I would love to see you send some samples to Larrin to test on his machine, he's said he tests them for free but more importantly it would be interesting to see what he thinks about the special treatments you're doing.
Larrin did tested a few set of un-notched charpy specimens for me. Excellent results however I need much faster turn around time. My tests are relative/against control specimens, so a certified pendulum charpy tester is nice but doesn't needed nor will enhance signal/noise ratio, especially when my #s are 1 to 5x relative to control. I started out with un-notched samples but they kept destroyed the carbide striker head due to high ft-lbs, hence switched to notched samples, of which around 1/10 ft-lb of un-notched.
Very impressive performance. You seem to subscribe to Cliff Stamp's hypothesis or ideal of optimizing the edge geometry and in your case, optimizing the heat treatment for the most edge stability to hold such angles. The toughness at such high hardness is seriously impressive.
Well, gotta kept all other variables, esp geometry, equal/same when testing ht performance.
@@BluntCutMetalWorks Which one is better for fighting knife 52100 or A2?
@@ThirdoptionJCSU 52100 supports higher/more bend/flex (for same thickness) thus blade less likely to fracture/split when subjected to prying motion... than A2
@@BluntCutMetalWorks Oh great!I DOnt have any A2 knives but all my choppers are in cpm 3v,52100,5160 and O1.There is a guy i think he is Japanize and he makes videos here on youtube saying that A2 is a way better than 3v .He compared 2 Bark river knives.Also he said that A2 is a way sharper than 3v.
@@ThirdoptionJCSU Blind chopping tests(all things/conditions equal) of good ht a2 vs 3v. A2 would performs slightly better than 3V. "sharper" is not a valid qualifier nor quantifier.
Wow, it sure chops! Would be interesting to make a competition axe with a fancy heat treat on good steel.
Certainly.
I would love to see what you could do with your heat treating on CPM Rex 45. it gets very hard already on production knives, you would probably go past 70 HRC. You heat treating must be pushing grain refinement to the extreme. As far as I know, when you do that, the temperature declines that you have to heat to, and quenching has to be even faster.
Hardness is easy, producing high hrc with full elasticity and decent plasticity ranges is quite difficult. High alloy steels have poor structural toughness. Thus far, aebl produces low notched impact toughness #s compare to lower alloy steels, esp very low (i.e. carbon steels).
you did a great job sharpening that axe yeah we had that Eucalyptus aussie trees here there crap in Florida when i was a kid and the aussie pepper trees were harder then the native maples and oak trees we had in Florida i would ruin tones of chainsaw blade when i was working for the fld wildlife park service for tree removal of a evasive trees and plants in Florida in my teen years i would chip out my hatchet heads all the time just delimbing them as well to stick limbs in the industrial sized wood chipper they even gunked those out we had to stop the machine regularly to clean it from there sap was so bad on how much it clogged it up but it burned good the sap from the pepper tree and Eucalyptus is was as filmable as pine trees
Thanks. Is Eucalyptus considered as invasive in Fl? As time goes forward - more and more ppl here (Santa Barbara) view Eucalyptus as invasive. Are there woods (native or invasive) with janka hardness exceed 3000? 15 degrees bevel with a small sharpening bevel is very thin, hence it required yield strength of 63 or higher rockwell c-hardness to support this edge for chopping fairly hard wood. Dried (less than 15% MC) woods (oak, etc..) are brutal/bouncy on 20+ degrees edge.
@@BluntCutMetalWorks Eucalyptus re invasive in Florida so are pepper trees there all over the place in fld