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| The Folding Knife (& Switchblade) Forum The materials, techniques and the designing of folding knives. |
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#1
05-27-2005, 03:34 PM
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Heat Coloring Titanium?
I am looking for the temperatures for heat coloring titanium.Thanks,Mcahron
__________________ N'T McAhron Sqwaukin Vulture Verrinder "to create is to make art" TREMBLING EARTH KNIFE WORKS 
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#2
05-27-2005, 04:32 PM
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I think your question might be answered in the General custom knife related discussion forum under the thread "heat colouring Ti"
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#3
05-29-2005, 01:03 PM
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I searched and wasnt able to find the temperatures needed.Lots of stuff on stainless but no specific temps on ti.Thanks
__________________ N'T McAhron Sqwaukin Vulture Verrinder "to create is to make art" TREMBLING EARTH KNIFE WORKS
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#4
05-29-2005, 02:27 PM
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I'm fairly sure I saw that thread myself. The information is probably scarce simply because most people (me included) have no idea what temps are required because most coloring is done with a torch.
What do you have for heating the ti? If it's just a kitchen oven just start as low as you can and increase by 50 degrees to see what you get. The one thing I am sure of is that when you reach a temperature at which the color will change, it will change very rapidly (only a few seconds required). In this particular case, you could probably work out the answer faster than you can find it on the forums....... __________________ Your question may already have been answered - try the Search button first!   
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#5
05-29-2005, 03:33 PM
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Forget about the kitchen oven. The temperature is only just enough to start colouration. (Thats In the gold-brown region) I have e-mailed McAhron the details on where to get the info. I've lost my table with the info, otherwise I would have posted it again. You will need a reasonable heat source because the best colours appear at 300-400centigrade and even higher. Will look for my papers and post it again if necessary.
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#6
05-30-2005, 07:30 AM
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You can't depend entirely on a chart, since the final color depends on how deep the oxide build up was when you started.
If you color a newly polished clean surface, it will be one color. If you color a piece that has been exposed to air for more than a few minutes, it'll be another color. Heat or anodizing simply adds to the oxide build up that is always there. Ti oxidizes immediately on exposure to oxygen. That's why it's called a "reactive metal". Different alloys also react differently to the same temperature. For instance, CP Ti will be a different color than 6al/4v at the same temperature.
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