Why M4 Steel Cuts So Well (Even Though It Rusts) скачать в хорошем качестве

Why M4 Steel Cuts So Well (Even Though It Rusts)

M4 will rust on you. That’s the trade-off. But in return, you get a combination of edge retention and toughness that is difficult to match — especially at this price point. In this video we break down CPM M4 using real data, including CATRA edge retention and toughness testing, and explain what’s happening at the microstructural level. From carbide composition to heat treatment and secondary hardening, we look at why M4 performs the way it does. We also compare it to common stainless steels like S30V, S35VN and S45VN, and discuss how newer steels like MagnaCut change the picture. — 0:00 Introduction 0:35 Origins of M4 (High-Speed Steel) 2:13 The Vanadium Problem 4:28 What’s Inside M4 9:05 From Tools to Knives 10:07 Edge Retention (CATRA) 11:29 Toughness 13:00 Sharpening M4 13:39 The Trade-Off — Topics covered: • Carbide structure (MC, M6C, chromium carbides) • Heat treatment and secondary hardening • Edge retention (CATRA / TCC) • Toughness and chipping resistance • Sharpening M4 • Corrosion and maintenance This is not about specs — it’s about how knives actually perform. If you use M4, let me know your experience in the comments. Data source: Larrin Thomas — Knife Engineering: Steel, Heat Treating and Geometry https://knifesteelnerds.com/2025/11/0... #Knives #KnifeSteel #CPMM4 #EDC #KnifeReview #Sharpening #EdgeRetention #Toughness