I would only add that we often see some manufacturers produce certain "trigger parts" made of sintered metal. I am not sure how that would affect the case hardening process but did feel it was worth mentioning
Fwiw, these compounds are potassium ferrocyanide (not harmful) with carbon black. I made some using fine ground charcoal mixed with pf and it works the same. Dave
You do need some carbon; it is after all a case hardening compound; which is creating a layer of high-carbon steel to quench.... Dave (sb327) said-Quote from: sb327 on May 11, 2021, 08:07:08 AMFwiw, these compounds are potassium ferrocyanide (not harmful) with carbon black. I made some using fine ground charcoal mixed with pf and it works the same. Dave And I seem to remember reading somewhere that aquarium charcoal was best??? Can't remember if it was for an instant case; or normal pack-hardening...Jesse
Think the aquarium charcoal was aimed more at traditional pack carburizing, since it was cooked??? or somesuch; here's a quote from Machinery's Handbook-"Common hardwood charcoal often is used, especially if it has had an initial heating to eliminate shrinkage and discharge it's more impure gases" So I'm pretty sure I'm remembering advice for pack hardening; not an instant case compound...Jesse
Didn't mean to suggest you pack harden; was trying to remember whether the aquarium charcoal reference that I remembered was to an instant case compound; or for the pack method (which only a very lucky sort of fella with a furnace could likely do)....Will be watching to see how things go for you; am following along to learn more myself...Jesse
Quote from: JuryRigger on May 19, 2021, 11:22:02 PMDidn't mean to suggest you pack harden; was trying to remember whether the aquarium charcoal reference that I remembered was to an instant case compound; or for the pack method (which only a very lucky sort of fella with a furnace could likely do)....Will be watching to see how things go for you; am following along to learn more myself...Jesse I'm looking for bone char. There are alot of items made from coconut shells but I don't know if that would be appropriate or not
Quote from: antithesis on May 19, 2021, 11:28:12 PMQuote from: JuryRigger on May 19, 2021, 11:22:02 PMDidn't mean to suggest you pack harden; was trying to remember whether the aquarium charcoal reference that I remembered was to an instant case compound; or for the pack method (which only a very lucky sort of fella with a furnace could likely do)....Will be watching to see how things go for you; am following along to learn more myself...Jesse I'm looking for bone char. There are alot of items made from coconut shells but I don't know if that would be appropriate or notAnd if anyone wants, I see someone in Croatia supposedly selling original kasenite FWIW but I already got a ton of ferrocyanide so I'm going homemade on this one
I know this is usually a no brainer question. And possibly posted in the wrong place.But anyone who is particularity familiar with kral guns. Particularly trigger parts....I know certain metals won't take a case hardening but would it be reasonable to assume that most types of steel used to manufacture trigger parts would be receptive to a surface hardening treatment? To polish trigger parts can potentially take enough from the part to render it soft. And if I have nothing to lose by doing so I am going to try to put something back into it I also see a variety of different compounds with different chemicals and dont remotely know good from bad....I've heard cherry red is ok. Anybody who can recommend a particular compound and if possible one that is DIY friendly, so I dont need anything more sophisticated than a oven or blowtorch?Mods: move this if you deem it necessary.
Quote from: antithesis on May 10, 2021, 10:48:53 PMI know this is usually a no brainer question. And possibly posted in the wrong place.But anyone who is particularity familiar with kral guns. Particularly trigger parts....I know certain metals won't take a case hardening but would it be reasonable to assume that most types of steel used to manufacture trigger parts would be receptive to a surface hardening treatment? To polish trigger parts can potentially take enough from the part to render it soft. And if I have nothing to lose by doing so I am going to try to put something back into it I also see a variety of different compounds with different chemicals and dont remotely know good from bad....I've heard cherry red is ok. Anybody who can recommend a particular compound and if possible one that is DIY friendly, so I dont need anything more sophisticated than a oven or blowtorch?Mods: move this if you deem it necessary. https://www.brownells.com/gunsmith-tools-supplies/metal-prep-coloring/color-case-hardening/surface-hardening-compound-prod27119.aspx
I have used the pf without charcoal and it works fine. It does have carbon in its makeup. https://en.m.wikipedia.org/wiki/Potassium_ferricyanideIf you have some already, try it on some mild steel, and test the results. I just added some carbon in testing and had good results too. I didn’t test to see which was harder, with vs without. Dave
Air float charcoal works best. You can make a small 1 gallon TLUD (google it) and make your own.
Quote from: Firewalker on May 20, 2021, 06:43:15 PMAir float charcoal works best. You can make a small 1 gallon TLUD (google it) and make your own.So a tlud to make the charcoal?Do you think it could be used in a pack hardening method? Sounds like it might work well for something small scale like that