Postby Brian Hunt » Sun Nov 13, 2005 2:57 am
Hi Travis,
You want to move on to annealing your blade fairly quickly. After you have quenched it in the oil, by the way transmission fluid works well for 5160, I like to hit the blade with some sort of abrasion to clean it up (sandpaper, a stone, etc.). It will be really hard, and files may only skip without being able to bite. After you have the blade back to bright steel, instead of looking gray, you will want to temper it. I prefer a shiny blade for tempering over one as it is out of the quench because I judge a lot of my heat treat by the colors of the steel, however knowing the correct temparature works very well on it's own. Be sure to use an accurate theometer, ovens are natorious for being incorrect on their heat settings if you go by the numbers on the knob. Do not wait over night to temper a blade after you have hardened it. There are a lot of stresses in the blade after you harden it. I have seen blades snap in half that were left untempered over night due to internal stress. So about an hour to two hours after you harden it, that gives you time to clean the blade after the quench without having it snap. Yes, you could use this method to do a rondell dagger, just remember, the longer the blade, the more chance of it warping when you harden it, accuracy in your filing will help prevent this. If you friend has a hand held belt sander, you can mount it in a vice, and use it for a cheap belt grinder. This will help you quickly move through the rough grinding, but I would reccomend finishing with your files. As far as this goes, the sky, and your resources for heat treating are the limet. You could make a sword using this method, but it would be really time consuming (for blades over about a foot long, you might want to invest in a inexpensive 4" angle head grinder from Harber frieght). Also remember on longer blades, draw filing is your friend. <img src="/forum/images/icons/smile.gif" alt="" />
good luck on wednesday, if you have any more questions, just speak up and I will answer to the best of my knowledge.
Brian Hunt
GFS