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Showing results for tags 'Tempering'.
Found 6 results
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Heat cycle, heat treatment, quench, temper
Paul Checa posted a topic in Metallurgy and other enigmas
Hi guys, so I was making a dagger and did 3 heat cycles at critical temp then quenched and tempered the blade for 3 hours at 350 F I was fitting the handle and guard and I twisted too Hard and the hilt snapped so I lost the blade. I'm attaching to show you my grain structure to see if it was properly treated (so I can learn something from this loss) I broke the blade in half so I could see the structure in the middle as well. Please comment below how you see the structure -
I’m currently tempering my tomahawk head at 450 for an hour. Would wrapping it aluminum foil during the temper secure it affect the temper in any way? Sort of a stupid question just making sure because I spent a while on this blade and the handle
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Yesterday evening I finished and heat treated my mini tomahawk head made from an old rusted prybar, and it successfully hardened to my surprise. I just did some research on tempering and wish I knew to temper the blade sooner, or that I had time to do it after the quench, but now it's the next morning and I don't know if tempering would be safe. The steel is fine and did not crack overnight and everything seems to be okay, but can critial damage be done during a temper similar to that of a heat treat? I heard 400F for 3 hours, cooling it every hour is the way to go, but this late after a treat
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I ground my third knife today from a file. The first knife was forged and heat treated, the second was ground and tempered twice at 400 degrees +- 5 degrees. This time I tempered a file three times at 400 degrees +- five degrees for 1 1/2 hours, letting it cool in the oven to room temperature between cycles. I then ground a knife. I tested the file tang before I ground the blade and it easily bent about 30 degrees and then back to zero. I ground the knife and did the brass rod test on the middle part of the blade and it passed at 30 pounds force. The tip failed, staying deformed. The
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I started making a small pen knife from a 3/16 inch thick spring. I got it forged, filed, quenched, and tempered but it snapped when I bent it. today I am going to make another one with more care in quenching and tempering. it was tempered at 450 for 1 hour.
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Specifications United States: AISI 6150, AMS 6450, AMS 7301, ASTM A322 (6150), ASTM A519 (6150), ASTM A829, SAE J1397 (6150) , SAE J412 (6150), AMS 6448, AMS 6455, ASTM A29 (6150), ASTM A331 (6150), ASTM A752 (6150), MIL. S-8503, SAE J404 (6150), UNSG 61500 International: DIN 50CrV4, EN 50CrV4, Chemistry Crucible: Carbon 0.50, Manganese 0.80, Silicon 0.30, Chromium 1.00, Vanadium 0.15 Metal Ravne: Carbon 0.51, Manganese 0.90, Silicon max. 0.40, Chromium 1.09, Vanadium 0.18, Metal Suppliers Online: Carbon 0.48-0.53, Manganese 0.7-0.9, Silicon 0.15-0.35, Chromium 0.8-0.9, Vanadium
