archiphile Posted October 20, 2008 Share Posted October 20, 2008 I have finished grinding the bevel and I am now ready to heat treat. This blade is made from a castoff hoof rasp. Dose anyone have any idea if they are air, water, or oil cooled. Any suggestions would be greatly appreciated. Thank you Best, Archiphile Quote Link to comment Share on other sites More sharing options...
Chuck Richards Posted October 20, 2008 Share Posted October 20, 2008 The problem with some hoof rasps is they can be case hardened.This means that to re-harden it would require some form of case hardening. Here is hoping you have a HC steel rasp. I would first try a quench from non-magnetic in warm oil, tranny fluid or even used crank case oil may work well. If it does not harden in the oil then use brine. If you have a piece of the rasp remaining then do some testing on it rather than risk the blade. Good luck Quote Link to comment Share on other sites More sharing options...
archiphile Posted October 20, 2008 Author Share Posted October 20, 2008 Thank you chuck I will give it a test on the remainder of the file. I am assuming by brine you mean a mixture of salt, soda, and water. Best, Archiphile Quote Link to comment Share on other sites More sharing options...
Chuck Richards Posted October 21, 2008 Share Posted October 21, 2008 Archiphile The brine I have used in the past was water and rock salt. Mix in the salt until a potato floats. This is the recipe that is in JPH's book. Quote Link to comment Share on other sites More sharing options...
archiphile Posted October 21, 2008 Author Share Posted October 21, 2008 Thank you chuck, I actually found a recipe and have heat treated the blade. I tested a piece of "scrap" and found that it was brine quench. Thank you again Best, Archiphile Quote Link to comment Share on other sites More sharing options...
Chuck Richards Posted October 22, 2008 Share Posted October 22, 2008 Not a problem. You can apply this to any of your found steels. I would just do the test before you did any major work just to be safe. Have Fun Quote Link to comment Share on other sites More sharing options...
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