Category: Powder Metallurgy
AR-RPM9 Knife Steel is False Advertising
It gets expensive to buy knives just to cut them up, and metallography costs even more. Support more knife steel research by going to Patreon.com/KnifeSteelNerds You get to read articles and watch videos before anyone else, participate in the Patreon community, and even get a free mug if you sign up for the highest support level.
USA vs Europe – Powder Metallurgy Knife Steels
Thank you to all the new Knife Steel Nerds Patreon supporters! Your support allows me to do new exciting experiments on knife steel. Some exciting ones coming up in the coming months!
Video
I also have a video which covers the same information (more or less) in this article.
Damasteel Heat Treatment and Properties
Thanks to the new Knife Steel Nerds Patreon supporters! The newly performed research in this article is all paid for through Patreon funds, such as the purchase of expensive Damasteel. Patreon money is only used for knife steel research. Sara Rempelos, Theo N, Christopher Kuehl, Dirk Hoogenbosch, Nick, nats spawnee, Krisztián Szegi, Todd Ellner, Seth V, Jonathan Graham, Ben Secrist, Drew Certain, Scott Armstuts, Ronald Justin Agee, Jim Darnall, Chris G, Farrell K., Bill Behnke, Paige, Luis Hernandez, clockworkfish, Barry Gordon, KarRawr, Ming Lin, Theodore Loach, Matt Bobchin, Flo, J.T. Pouland, Mark Watt, 愷麒 王, and Nickolay Matershev.
What is the Future of Stainless Knife Steel Design?
Thanks to Aram Compeau, Gordon Olafson, and John Walton for becoming Knife Steel Nerds Patreon supporters! I have an update on Patreon about the “rare earth” elements in AR-RPM9 steel.
I completed a minor revision to my new book Knife Engineering to correct a few typos. Some readers outside the USA also asked for more conversions from Fahrenheit than were present originally, so I incorporated both Celsius and Fahrenheit everywhere in the book in the text and tables, though some images and charts still have only one temperature scale or the other. I wouldn’t say that the changes in the revision are big enough to buy a new one if you have it already, this is not a new edition, but if you haven’t purchased one yet this is as good a time as any.
M390 vs 20CV vs 204P – 3rd Generation Powder Metallurgy Technology?
Thanks to Josh Warren and Alex K for becoming Knife Steel Nerds Patreon supporters!
Edge retention testing is continuing, we have now tested 18 different steels, and four of those steels with multiple heat treatments. Come to Patreon if you want updates on testing as it is completed.
The History of Powder Metals in Damascus Steel
Gratitude
Thanks to cbw, Doug Siddens, Nick Dunham, and Robert Martin for becoming Knife Steel Nerds Patreon supporters!
I interviewed several knifemakers for this article. Thanks to Ed Schempp, Hank Knickmeyer, Steve Schwarzer, Rick Dunkerley, Jim Batson, Shane Taylor, Jeff Carlisle, Kelly Cupples, Daryl Meier, John Davis, Matt Diskin, Wade Colter, Barry Gallagher, Howard Clark, Bob Kramer, and Devin Thomas for talking to me.
New Micrographs of 42 Knife Steels
10/15/2020: I added M398, WFN, Nitrobe 77, and Vancron
2/24/2020: I added 420HC, CPM-T15, Rex 76, S125V, SPY27, and Z-Max/Rex 86
2/10/2020: I added 26C3, 1.2442, 1.2519, 1.2562, Blue Super, V-Toku 2, and A8 Mod.
All About D2 Steel – Development, Use in Knives, and Properties
Thanks to Robert Erickson, knifeandgear_swiss, Dale Bushness, and Paul Hart for becoming Knife Steel Nerds Patreon supporters!
Update 10/22/2020: I now have an article with how to heat treat D2, PSF27, and CPM-D2 and it also includes toughness testing of each steel and edge retention testing of D2. https://knifesteelnerds.com/2020/08/31/how-to-heat-treat-d2-psf27-and-cpm-d2/
What is Powder Metallurgy?
Thanks to Greg Jessen for becoming a Knife Steel Nerds Patreon supporter! There is currently a poll on Patreon for voting members on what equipment I will purchase for future research.
Conventional Casting