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QUOTE: This is dependent upon my oven getting to 1900 degrees and holding steady.
That's very true so if you have an electric furnace you're good to go, otherwise send it out.
The dry ice cryo will help but use kerosene or diesel fuel instead of the alcohol. Put the blade in as soon as it has cooled to room temperature, leave it over night (which is longer than necessary but I find it convenient), and pull it out the next day. Let it warm to somewhere close to room temp and then start your tempering cycles.
Some guys like to temper once before cryo and that's OK but you must always do at least one tempering cycle after cryo so I find it more convenient to simply cryo first and then do all the tempering...
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