sargentcrunch
Plastic
- Joined
- Sep 3, 2019
I am going to be heat treating some 4140 parts soon in a non-controlled environment ht oven, and I have some questions, mainly regarding decarb and scale. It seems that the best ways are obviously either a controlled oxygen purged environment or a molten salt bath. I have read about using stainless foil or anti scale compound, but I have some concerns.
With the foil, my main concern is, how I will remove the part from the envelope fast enough to quench. My first idea was, open the oven, cut the bag, remove the part, and then quench. To me it seems that it may be quite a pain to do all that fast and effectively (without the bag getting caught on the tongs, etc). My second idea was, open the oven, remove the bag with the part in it, hold it over a 'ladle' so to speak, cut the bag to let the part fall in the ladle and immediately quench. It seems that this would be much faster, although I would need another person helping.
How well do the various anti scale compounds work? I have found powder and paste. I have also seen people use borax as well.
I am hoping some of you guys have experience with this and can offer some tips and advice to make this go as smooth as possible haha
With the foil, my main concern is, how I will remove the part from the envelope fast enough to quench. My first idea was, open the oven, cut the bag, remove the part, and then quench. To me it seems that it may be quite a pain to do all that fast and effectively (without the bag getting caught on the tongs, etc). My second idea was, open the oven, remove the bag with the part in it, hold it over a 'ladle' so to speak, cut the bag to let the part fall in the ladle and immediately quench. It seems that this would be much faster, although I would need another person helping.
How well do the various anti scale compounds work? I have found powder and paste. I have also seen people use borax as well.
I am hoping some of you guys have experience with this and can offer some tips and advice to make this go as smooth as possible haha