Finished the seax this afternoon (save for a little oiling and the like):
Wednesday, September 29, 2010
Tuesday, September 28, 2010
Wednesday, September 22, 2010
Thursday, September 16, 2010
Marquenching
I got a question about marquenching and what it means. Basically Marquenching is taking a blade that is heated to above the critical point (somewhere around 1500f depending on the steel where it is converted from pearlite in to austite) and quickly cooling it (in either a low temp salt pot or in hot oil) to below the "nose" (a term comming from heat treating time/temerature charts) or to below approximately 900f in less than about 2 seconds. then holding it at around 400-500f until the entire blade is the same temperature. when the blade is removed from the hot oil it is very plastic and can be bent almost as easily as if it was 1500f. This allows the smith to straighten out any minor warps that occurred in the quench. As the blade cools the crystal structure of the steel changes from austite into martensite (the hardend steel) as the crystaline structure changes it creates a very faint high pitched ringing sound known as "singing". If the blade "sings" it means that the marquench was successful.
Here is a short video of the prosess:
Here is a short video of the prosess:
Here is today's and yesterday's progress on the sax. I re-ground the blade, giving it more taper and a slight distal taper as well (it felt to "dead" in the hand before). I HTed it using a marquench and triple hot/cold cycles. Today I polished it out to 800gt.
Tomorrow, Lord willing, I will be finishing the polishing.
Tomorrow, Lord willing, I will be finishing the polishing.
Saturday, September 11, 2010
Nijmegen sax
Wednesday, September 8, 2010
Friday, September 3, 2010
Computer trouble
My computer has been having trouble and this morning it tried to commit suicide by drowning itself (a wayward glass of water landed on it). I will see if I can get it running again, but if not then it may be a while be fore I can post.
Thanks for your patience.
Thanks for your patience.
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