Hey guys, so I worked up a Heat Treat regiment for S35VN. I know this may be common knowledge for some of the pro's here, but I needed my own recipe with known results. Thought I would share. I started with Precision Ground S35VN from Jantz. 1/8th thick by 1.25'' wide. Square sized samples were prepared, a total of 6. These samples were then sent to an independent testing facility for HRC values after treatment. All samples were tested 5 times with an average and Std. Dev. reported.
Evenheat Kiln was used for programing and preforming both hardening and tempering cycles:
2 segments, ramp full to 1575f and hold for 10 minutes
ramp 3000 to 1975f and hold for 20 minutes
plate quench (all samples in same foil packet)
Dry ice in denatured alcohol for sub zero 24 hours( I know excessive time)
Samples were treated as follows with HRC results:
Sample 1: NO heat treatment, as is from Jantz= Hrc 24.9 / Std dev of 0.3
Sample 2: Heat treat only after plate quench= Hrc 63.1 / Std dev of 0.2
Sample 3: Heat treat with sub zero, no temper= Hrc 63.2 / Std dev of 0.3
Sample 4: Sub zero then Temper 2 times at (350 deg./2hours)= Hrc 61.3 / Std dev of 0.2
Sample 5: Sub zero then Temper 2 times at (400 deg./2hours)= Hrc 59.8 / Std dev. of 0.3
Sample 6: Sub zero then Temper 2 times at (500 deg./2hours)= Hrc 59.0 / Std dev. of 0.3
I have learned a lot from this experiment, I feel like I may be ready to start producing some knives that I know should preform to my liking.
Any comments or concerns please feel free to post, love the forum and happy to be here, Thanks in advance
Hope this can help some in need.
Ja
Evenheat Kiln was used for programing and preforming both hardening and tempering cycles:
2 segments, ramp full to 1575f and hold for 10 minutes
ramp 3000 to 1975f and hold for 20 minutes
plate quench (all samples in same foil packet)
Dry ice in denatured alcohol for sub zero 24 hours( I know excessive time)
Samples were treated as follows with HRC results:
Sample 1: NO heat treatment, as is from Jantz= Hrc 24.9 / Std dev of 0.3
Sample 2: Heat treat only after plate quench= Hrc 63.1 / Std dev of 0.2
Sample 3: Heat treat with sub zero, no temper= Hrc 63.2 / Std dev of 0.3
Sample 4: Sub zero then Temper 2 times at (350 deg./2hours)= Hrc 61.3 / Std dev of 0.2
Sample 5: Sub zero then Temper 2 times at (400 deg./2hours)= Hrc 59.8 / Std dev. of 0.3
Sample 6: Sub zero then Temper 2 times at (500 deg./2hours)= Hrc 59.0 / Std dev. of 0.3
I have learned a lot from this experiment, I feel like I may be ready to start producing some knives that I know should preform to my liking.
Any comments or concerns please feel free to post, love the forum and happy to be here, Thanks in advance
Hope this can help some in need.
Ja
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