Too fine grained

mete has the answer......a three step refinement regime ( where have I heard that before????)


Start at 1600-1650F, with a quench. Then about 50F above critical, with a quench. Then at 50F below critical with an air cool to 900F and then cool in the slack tub.

This will set you up for final HT that will produce a fine grain and fully hardened blade.
 
mete has the answer......a three step refinement regime ( where have I heard that before????)


Start at 1600-1650F, with a quench. Then about 50F above critical, with a quench. Then at 50F below critical with an air cool to 900F and then cool in the slack tub.

This will set you up for final HT that will produce a fine grain and fully hardened blade.

When you say "critical" do you mean LCC/approx. 1350 F?
 
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