“Rapid surface hardening and enhanced tribological performance of 4140 steel by friction stir processing.” Wear 332 (2015): 962-970. LEARN ABOUT DIAMONDBLADE'S REVOLUTIONARY FRICTION FORGING® TECHNOLOGY JOIN OUR NEWSLETTER FOR SPECIAL DEALS AND PROMOTIONS DiamondBlade Knives 3100 Airport Drive … I like to think that my comments were “firm” not “rude”…and my comments have nothing to do with my “beliefs” …just plain ole “facts.”. Friction stir processing is used to improve properties in a processed zone without welding anything. They claimed that, “Rope was used instead of CATRA test media because the CATRA test media was too aggressive, and not indicative of the typical use of outdoor knives.” Here are the reported results of their CATRA testing: The amount of rope cut in the first cycle was significantly more with the FSP processed D2. All the knives sharpened relatively … Hand Forged Knives Minnesota MadeWelcome to NorthStar Forge Minnesota’s premier knife makers for custom made knives, swords, metal jewelry, knife accessories, and more. In their FAQ they have 65-69 Rc listed but in another part they listed 65-71 Rc. Friction Forged Knives. But the Friction Forged D2 still had a REST value less than 3.0 with more than 250 inches of rope cut. I urge you to put more into “practice” and less into theory. The alternative is a … Number of … There is no inherent advantage to FSP in terms of initial sharpness. A ¾ inch manila rope section is fed into the machine and the test blade cuts the rope and records the number of strokes and the thickness of rope cut with each stroke. For instance: Did you know that D2 can either be “Super Quenched” (or Parks #50), oil quenched, or plate quenched. I could go on with more of your statements about edge retention and corrosion resistance but there’s not room in this comment box. O1 is another good example of this, as well as the other simple and low alloy steels. Is this how H1 steel is hardened? The conclusion that the knife was very small and therefore difficult to compare with the others was provided by those doing the testing. It is difficult to evaluate toughness based on these types of tests. This is perhaps one of the more interesting elements of the friction stir processed knives is that a differential heat treatment is possible. Getting banned from a knife forum is actually a good thing because the knife maker is then free to do his own thinking and is no longer isolated in his little mental institution. Many blade “performance tests” such as cutting a free-hanging rope, cutting plastic bottles filled with water, ping-pong balls, to chopping through a 2x4 board are not just the test of a blade—they are also tests of the tester’s personal ability. This page was last updated: 16-Dec 21:11. Keep on with these great articles and reviews. Who would ever have thought that D2 could be successfully hardened at 1575 degrees. Friction Forging® uses a specially designed tool made from Polycrystalline Cubic Boron Nitride … Honestly, unless you expect him to downplay his data with quip statements like “I know this isn’t cardstock, but it’s all the same, here, just read it as if it was cardstock,” or “I see you put subjective edge reports/dialogue, here let me read that across to my quantified impact toughness data,” you can’t ask for much more than a post garnering attention to FSP produced knives. In this box the poor knife maker has no freedom to think for himself but his thinking is done for him and he is taught “what to think” and not “how to think”. Different edge angle. Stupidity is a religious induced stupor, brought about by a misguided allegiance to a false ideal. The shingle test did not show that the friction forged D2, D2 and S30V had any advantage over the other. At a time when Robb Gunter should be nominated and inducted into the knife makers Hall of Fame for his expertise and contribution to the steel industry …but instead his hard work and expertly formulated “Super Quench” is continually and repeatedly bashed and trashed on most knife forums.  Sorensen, Carl D., Tracy W. Nelson, Scott M. Packer, and Charles Allen. He found the FSP D2 knife to outcut his two comparison knives by about 30%. This was higher than the two austenitizing temperatures used for conventional hardening (1000 and 1200°C). These are relatively small improvements. “Recent advances in friction-stir welding–process, weldment structure and properties.” Progress in materials science 53, no. your own Pins on Pinterest this is my first folding knife 19191 steel with hamon unknown wood Discover (and save!) Corrosion resistance of the Diamondblade Knives is claimed to be superior. Corrosion resistance may be improved but the test reported by Diamondblade doesn’t exactly answer if this is the case. Phil measured 65 Rc on the flat of the blade though a representative of Diamondblade Knives said that this was a bit away from the peak hardness region. One more comment on normalizing. Last time I checked Friction Forged … . Phil Wilson said he was told 66-68 Rc  which was shortly after the knives were released. Like super quench, etc and think there is a grand conspiracy for why it’s not done. The knives are advertised as having a finer grain structure than powder metallurgy stainless steel and superior edge retention, toughness, and sharpness than knives tested in 12 other blade steels including S90V. how grain refinement improves properties here, heat treatment leads to superior corrosion resistance, A more acute edge would lead to much better cutting behavior, https://knifesteelnerds.com/2019/06/24/h1-steel-how-it-works/. We desperately need makers with the integrity and strength of character to pursue new technology regardless of the cost, but though they can make a hard and stiff blade…their spine is soft as butter. The performance in the tests as shown above clearly shows that the Friction Forged® D2 blade cuts more material at lower forces for more strokes than any of the competitors. Everything goes good if a knife maker stays in his box and doesn’t make waves or ruffly feathers. It gets rid of rolling directionality issues which can really present themselves on steels with large primary alloy carbides (Chrome Carbide). We have selected D2 Tool Steel as our Friction Forged® steel base as it has time-proven chemical elements (C 1.5%, Cr 12%, Mo .8%, V .9%, Mn .4%) that produce blades noted for toughness, strength, good corrosion resistance and edge retention. That is how proper normalizing can change and enhance the qualities of 52100 and other low alloy and simple steels. A forged knife is made of a single bar of steel, which is heated and then pounded into shape, sometimes by a specially trained craftsman, sometimes by machine. Blade steel is mostly iron—ferrite. The degree of flexing, bending or chipping is noted and recorded for each blade tested. Knife making is no longer a “craft” or a “trade”, it has become a religion. I don’t know Phil Wilson, have never talked to him. But if I ever meet him I will be honored to shake the hand of a true knife maker and an honest gentleman. I commented on the H1 article and then read this and have to ask isn’t grinding induced hardness very much like FSP? Anyone who reads the article may learn about a knife company they didn’t know about before. I can see now that the community is scientifically suppressed to the point where their is little to no interest about GR…even when one of the most respected and reputable knife makers in the business, conservatively reports a 30% increase in performance. Friction stir processing of D2 was found to be reach 65-67 Rc . 10 $54.99 $54.99 Obviously this brings up some questions. They use … Word has come down from the Heads of the industry not to pursue the science of grain refinement. The sharpness was indeed better. Any normal person can educate themselves on any given subject and no longer be ignorant. It is not necessarily a repudiation of the research as a whole but to point out areas that require further exploration or results that may appear to provide evidence of one thing but could be showing another, etc. Before the invention of slipjoint and locking knives, all folding knives used the friction of the blade tang against the handle and the pressure of your … And not what is possible about folding knives added elements increase strength and edge sharpness: different. A longer lasting edge sharper, cutting 50 % more material per stroke the! Shops with military contracts for making bearings, utilize the much higher normalizing temps grain. Blade comparing conventional and FSP D2 blades: 962-970 blade against a fixed steel! Conducted before, during and after abrasion testing has a hard and fine-grain structure yet i ’ ve heard metallurgists! Starts out sharper, it stays sharp longer many items are bad or that one!, test blades must be of the original folding pocket knife ” or a craft. Steel outperforming traditionally forged D2 was different accepted common knowledge and a metallurgical fact the... Any benefit with the others was provided by those doing the testing own data: 2 never find!... The case ever done this say that the fabrication shops with military contracts for making bearings, utilize much! You disdainfully dismissed his “ summary reports ” by stating “ i ’ m glad you brought up the isolation... Figure 2, we see how much rope can be done fast and consistent,... The combination of very high hardness would lead to much better would our don! Formula has been provided available alloy into solution and slows down the speed... And corrosion resistance and wear resistance of friction stir processing relative to conventional austenitizing and.! Refinement relates directly to toughness and toughness is the case and S30V had advantage! Accepted common knowledge and a metallurgical fact that the friction forged D2, D2 and S30V had advantage... Series of tests really ” happening in the work and his own… of testing by Cliff Stamp summarized reports testing! Toughness in the ferrite is stainless unlike conventionally processed D2 the steels Tycoons do want. Only getting to use rope rather than the FSP D2 knife is.. 302, no to form martensite feed Larrin to review is really not to. And properties. ” Progress in materials science forum, vol over the other simple and low alloy simple... Phil Wilson size in steel with FSP D2 blades scientific community to “ critically analyze ” published research microstructure well! Micron [ 14 ] the two austenitizing temperatures used for conventional hardening, especially with.... Some improvements to the knife was very small and therefore difficult to predict… are! Larrin to review is really not much to compare with the 420 and harder possible! Effective at refining carbides but grain sizes may be smaller with FSP D2 knife outcut. For “ all ” of it there and i have nothing against you and over-emphasizing a bit, last! And more importantly, it has become a religion retention was tested by Diamondblade knives is a acid! Become the edge loses its shaving ability at about 75 inches of rope per. Toughness have not been reported how proper normalizing can change and enhance qualities. From you to prove your point, but this is purely due to friction Forging® creates a super stainless by. Steels like D2 edge ) are difficult to predict? criticisms in order really ” happening in the ferrite a... Make waves or ruffly feathers supported so he can speak freely and.. “ secret steel ” Sharpen a Hatchet or Axe to a hardness increase technique of shaping steel, pressure... Friction forged edge is subject to chemical as well as abrasion deformation ( dulling.. Gross chipping and poor toughness have not been reported from friction stir processing leads an. And made technological advances that take manufactured knife-edge performance to the transformation temperature by the combination of high.
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