Wrought Iron Farm Posted June 13, 2016 Share Posted June 13, 2016 Ok I have made around 13 knives and just made my first chef knife out of 1075. I shaped it put the bevels in and sanded it with 220 then 400. After it was smooth and most scratches were out I heated with my torch till non magnetic and quenched in oil. I then sanded the scale off and put in the oven at 500 for two hours. It came out this beautiful blue purple gray copper colors. I would like to leave it like that if it's possible, and just put the final edge on it after I pin and epoxy the handles on. I guess the question is would those colors hold up or would they rub off or would it be susseptable to rust? Quote Link to comment Share on other sites More sharing options...
Steve Sells Posted June 13, 2016 Share Posted June 13, 2016 they will rub off. Quote Link to comment Share on other sites More sharing options...
JHCC Posted June 13, 2016 Share Posted June 13, 2016 4 hours ago, Steve Sells said: they will rub off. Steve, is that a function of the specific alloy, or is that true for oxidation colors in all steels? Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted June 13, 2016 Share Posted June 13, 2016 by their very nature they are very very very thin and so are subject to wear issues and so not suitable for items that get used. (cf Thin-Film Interference) Quote Link to comment Share on other sites More sharing options...
7A749 Posted June 14, 2016 Share Posted June 14, 2016 I know nothing about heat treat, but I heat color a lot of my artwork and it comes right off with minimal polishing or sanding. A chemical treatment such as hot bluing (technically rusting) will hold up quite well. But even a good hot blue will come off with a mildly aggressive polishing wheel. Of course, whether or not it would be acceptable on a utensil cutting food I wouldn't know. Without some form of coating, the metal will indeed rust. IMHO of course Quote Link to comment Share on other sites More sharing options...
rhitee93 Posted June 14, 2016 Share Posted June 14, 2016 This wasn't part of your original question, but I suspect you'll find that tempering 1075 at 500F is going to give you results that are pretty soft for a chef knife. Opinions vary, but I would have tempered at 390F. That being said, it looks like a good start otherwise. I'm not a fan of a ricasso on a chefs knife, but Wusthof puts them on some of their high end knives. Quote Link to comment Share on other sites More sharing options...
Wrought Iron Farm Posted June 14, 2016 Author Share Posted June 14, 2016 I'm gonna give it shot as I made it for myself worse comes to worse I'll sand and polish it Quote Link to comment Share on other sites More sharing options...
JHCC Posted June 14, 2016 Share Posted June 14, 2016 Nice lookin' blade. Quote Link to comment Share on other sites More sharing options...
wonkydog Posted June 15, 2016 Share Posted June 15, 2016 I wouldn't worry about the color, if you had polished it would turned color after use in cooking. Quote Link to comment Share on other sites More sharing options...
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