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I bought some HSS stub drills, and treated half of them with liquid nitrogen, which improved their wear resistance dramatically. I also look at the change in microstructure with an electron microscope.
Performance of cryogenically treated M35 HSS drills - sci-hub.ru/10.1007/s00170-011-...
Performance of cryogenically treated HSS tools - sci-hub.ru/10.1016/j.wear.2006...
Effects of Cryogenic Treatment on the Strength
Properties - sci-hub.ru/10.1088/1757-899X/2...
LN2 generator video: • Liquid Nitrogen Genera...
Heat treatment of steel video: • Intro to heat treatmen...
Source of drill bits: www.mcmaster.com/catalog/125/...
Temperature logger (discontinued, unfortunately): www.adafruit.com/product/3081
3M fine polishing pads: www.amazon.com/Tri-M-Ite-Poli...
Delorean patent on cryogenic torsion bar: patents.google.com/patent/US4...
Steel grain structure inspection, and overall great channel for material analysis: • Metallography Part II ...
Steel grain structure video: • Grain Structure of Steel
Applied Science on Patreon: / appliedscience