Heat coloring ti in an oven info.

Joined
Sep 23, 1999
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Well, I did some experimenting and here are the results.
Overall, it was a let down!
I could only get a light gold color, some purple, and a nice solid blue. No solid purple, deep gold, or bronze at all.
I ran three cycles, the first started at 800 degrees and went up 50 degrees at a time and held each temp for five minutes.
The second run started at 1050 and went up 25 degrees at a time and held each temp for 5 minutes.
The last run started at 1135 and went up 30 degrees at a time and held each temp for 5 minutes.
The colors I got at each temp were consistent.
No change till the temp hit 1050 and then the gold started coming in.
At 1100 the gold showed up nicely.
At 1150 purple spots appeared.
At 1200 the ti turned almost solid blue.
At 1250 most of the color had gone away and at 1300 there was a slight gold and purple mix.
On the last run I did get a nice solid blue at 1190. I did some heat coloring tonight at this temp and got the same blue and really like it.
One thing I learned tonight.
Place the parts the same depth in the oven, i.e., inline with each other cross ways. If you put them inline with each other front to back, the parts will come out different colors because the oven doesn't heat up uniformly. Also, the smoother you get the ti, the more uniform the color will be. You'll also need something like acetone or paint thinner to clean it with prior to heating. I'm going to rig a jar with a basket like you use to clean carburetor parts, just put the ti in the basket and dip it in the acetone. Then let it dry and use some tweezers to set the ti in the oven.
Well, I hope this babble helps some.
Take care and have a grand week end!
Michael
 
I was working on my lathe making a new and improved slitting saw arbor while running the tests Kit. :)
How do you clean the ti before you heat color it?
 
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