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16th March 2009, 03:01 AM
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#1 |
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Member
Join Date: Jul 2005
Location: Tallahassee, FL
Posts: 131
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Steel is made up of crystals, and its crystal microstructure is dependent on things like how it was worked, and what temperatures it was heated up to and cooled down from- and at what rates.
When a bladesmith quenches a carbon containing steel blade from above a specific temperature into oil or water, certain microstructures are formed. Different microstructures form because of a number of factors, including the amount of carbon, the temperature before quenching, and the rate of cooling. These different microstructures look different when etched, and that is the reason parts of your blades are darker than others. |
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16th March 2009, 06:29 AM
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#2 |
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Member
Join Date: Mar 2005
Posts: 373
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Responce
Since the top two blades are probably from the same general area.
I can see I was comparing apples and pears. Your explanation, makes sense to Me. now that i can step back and see why the different effects occurred. Thanks you, Steve |
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19th March 2009, 05:50 AM
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#3 |
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Member
Join Date: Jul 2005
Location: Tallahassee, FL
Posts: 131
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nice looking blades, btw! ;-)
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