January 24, 20215 yr Using 1084 after quench tempered for 2 hours at 400 and blades turned blue. I didn't expect this and not sure if they are good or what to do next. Should I start over normalize, quench (harden) then temper? Of course this is new to me, only used salvaged springs and a sway bar before and that's just 3 knives. I've heard the term blue back but no experience with method or what it looks like. This is different correct?
January 24, 20215 yr Are you sure your oven is a true 400° F? Most oven thermostats can be off by quite a bit and require an accurate thermometer inside.
January 25, 20215 yr Check the hardness and edge holding if its what you like or want then you are ok; Edges being thinner react more to the cycling of the oven.
January 25, 20215 yr If your oven temperature checks out OK, and you are sure that they didn't get over the setpoint as the oven was warming up, then you are probably OK. The oxide colors are not a great means of judging the temperature the steel reached. A lot can effect them other than the actual temperature.
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