- Joined
- Dec 9, 2019
- Messages
- 14
Hello everyone, names Mike and I have done a lot of research into the best heat treating practices for this particular steel, including reading the threads I could find on this forum.
Typically use 3/16 and 1/8 thickness
I have had a chance to make a few blades from s35vn and this is my predicament...
For the first recipe-
Grind blades to final thickness
1. Double wrap blade in heat treating foil rated for 2200F
2. place pouch into heat treating over (Evenheat), turn on oven and bring blade up to temperature 2000F for 15 min soak.
3. Quench on 2 aluminum plates in a vice setup with compressed air shooting between them
4. temper 400 for 2 hrs
5. dry ice 20-30 min
5. last temper 400 for 2 hrs
I only have hardness files to test the hardness but a 60 file seems to skate just fine.
My concern is that it takes my oven about 3 hours and 30 min to get to 2000 so that's a long time that the blades are sitting in the oven. However, they are completely straight (given how I grind the bevels to final thickness) and have good color on them post heat treat (from examples I have seen, pale grey with some "rainbow" coloring). is that detrimental to the steel for being in the oven that long?
the second recipe I have recently tried is:
Grind blades to final thickness
1. Double wrap blade in heat treating foil rated for 2200F
2. bring oven to 1950 and soak for 30 min. I then open the oven and place the blades into the oven, let it get back up to 1950 and soak for 30 min
3. Quench on 2 aluminum plates in a vice setup with compressed air shooting between them
when I open the foil packets the color looks good but I get some nasty warps that just about ruin the blades. When using the 1st recipe, the blades come out straight and true all the time.
I could always heat treat and then do my bevels, take my time as to not blow the heat treat, then temper, cryo, temper. I would be concerned about going through belts pretty quick though, perhaps using some low grit ceramics with abrasive wax could assist in material removal and keeping the temp low.
I want to do my best work that I can so any feedback/thoughts would be much appreciated!
-Mike
Typically use 3/16 and 1/8 thickness
I have had a chance to make a few blades from s35vn and this is my predicament...
For the first recipe-
Grind blades to final thickness
1. Double wrap blade in heat treating foil rated for 2200F
2. place pouch into heat treating over (Evenheat), turn on oven and bring blade up to temperature 2000F for 15 min soak.
3. Quench on 2 aluminum plates in a vice setup with compressed air shooting between them
4. temper 400 for 2 hrs
5. dry ice 20-30 min
5. last temper 400 for 2 hrs
I only have hardness files to test the hardness but a 60 file seems to skate just fine.
My concern is that it takes my oven about 3 hours and 30 min to get to 2000 so that's a long time that the blades are sitting in the oven. However, they are completely straight (given how I grind the bevels to final thickness) and have good color on them post heat treat (from examples I have seen, pale grey with some "rainbow" coloring). is that detrimental to the steel for being in the oven that long?
the second recipe I have recently tried is:
Grind blades to final thickness
1. Double wrap blade in heat treating foil rated for 2200F
2. bring oven to 1950 and soak for 30 min. I then open the oven and place the blades into the oven, let it get back up to 1950 and soak for 30 min
3. Quench on 2 aluminum plates in a vice setup with compressed air shooting between them
when I open the foil packets the color looks good but I get some nasty warps that just about ruin the blades. When using the 1st recipe, the blades come out straight and true all the time.
I could always heat treat and then do my bevels, take my time as to not blow the heat treat, then temper, cryo, temper. I would be concerned about going through belts pretty quick though, perhaps using some low grit ceramics with abrasive wax could assist in material removal and keeping the temp low.
I want to do my best work that I can so any feedback/thoughts would be much appreciated!
-Mike
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