Monday, December 21, 2015
KN18 THROUGH TANG - HEAT TREAT AND GRINDING
Here is the blade coated with Condursal. This protects the blade during heat treatment. The blade gets to over 1000°C.
Straight out of the oven and into the oil.
After two tempering cycles at 185°C (365°F) I start the bevel grinding. The steel is very hard and I cannot overheat it now or it will be ruined.
This grinding takes about an hour.
More grinding. Once the edge is down to about 0.02" I move to a finer belt.
Now the edge is at 0.015" I start the scotch-brite conditioning belt. This give a brushed look.
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