Case hardening mystery

Well i seemed to remember some recent discussion about color caseing - but be damned if i can find that thread.

Have you got it all figured out and perfected now ?


The book is an interesting read.

It's back to school time for me...sigh
 
Over on Don Fogg's forum, there's a May '06 thread in the beginners area that has a really good explanation of one process. Particular thanks to Chuck Burrows and Jerry Huddleston for that one.

Take care, Craig
 
Steven Penner said:
Well i seemed to remember some recent discussion about color caseing - but be damned if i can find that thread.

Have you got it all figured out and perfected now ?


The book is an interesting read.

It's back to school time for me...sigh
Click to expand...

Its good to hear from you again.
I dont have it perfected but instead just send it out to Doug Turnbull in NY. He is a master at the process and makes me look good. Its only money.
 
Bruce since this thread has been resurrected I thought that I would mention my secret. I adde 1 kg of potassium nitrate to 9 gallons of hot water. a drip line with with the little holes the length of it coiled in the bottom with a peice of expanded metal holding it down. hooked to an airline with a regulator adjusting the pressure to 25psi. soak at 1450 for two hours. I made my crucible with a slip top and a short handle. aireated the water for two hours(the whole time that I was soaking the crucible) the removed it from the oven and just dumped the lid and contents into the tub of bubbling water. the bubbles help with activity in the colors. the reds do come from using arsenic in the water or crucible. It is safest disolved in the water unless you get real thirsty. I also heard that urine in the water helps with color but I don't know about that. The soak time is related to how deep you are carburizing the steel not how the colors turn out. deeper carburizing = more durable color to a point. the colors come from oxide just like when nitre bluing.
 
Bill, a couple questions:
The water will be cool after 2 hours, is hot water just to help dissolve the pottasium nitrate?
Is it ok to have a loose lid or should it be air tight?
Do you use arsenic? Do you get reds?
Do you spray clear on the finished parts?
Can I borrow a hundred bucks?
 
Yes, yes, loose is what you want. no, no, sure but you can't waste it or piss it off you have to use it for something worth wile like booze and boobs.
 
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