Heat treating questions

C

chucktilbury

Guest
I have heat treated 4 blades now. I have a couple of questions. I am working mostly with O1 steel.

Some people seem to recommend higher hardening temps than others, but I am seeing that the higher temps tend to give me warping problems. I found that a magnet stops sticking at around 1000F - 1100F, but the steel does not really get that hard. If I heat it to around 1400F - 1500F (I am going by color only, see here http://www.threeplanes.net/toolsteel.html) it gets hard but it warps really bad. What I am wondering is, if I heat it and quench it several times at the lower temp, will that get the steel hard? Maybe warp it less? How about several tempering cycles? I have seen some people recommend that as well. Thoughts?

Thanks everyone!
Chuck Tilbury
 
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