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Learning to look for the decalesense is also a good way to see if the steel has austensized. It looks like a shadow that passes across the steel. There are some videos on some of these sites that show it. It is caused by the energy of the heat being used to cause phase conversion rather than light so you know when you see it you have at least achieved conversion to austenite.
As far as the faster oil goes, it may or may not solve your problem. As I said it depends on your exact alloy. If what you have is the 1080+ then it may well harden the blade all the way to the spine. If it's more like the classical 1080 with little more than iron, carbon, and manganese then the steel may not be hardenable to the thickness of the spine of the blade and will only harden part of the way up. This is seen more often in alloys like 1075 or 1095. It also depends on grain size with larger grain promoting hardenability, not something that you want.
Doug
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Last edited by Doug Lester; 10-30-2017 at 12:33 PM.
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