surface hardening compound?

[Nylunds knives]

Hi,

I was wondering if you could use a surface hardening compound used for case hardening lowcarbon steel to protect blades for decarb when heatreating.

I would use it as a thin coat over the atp anti scale product.



Regards Jakob

 

[hathegkla]

you could try but usually you have to clean up the blade after ht anyway and grind off a bit of the surface. unless you are overheating the crap out of them I don't think the decarb would go very far into the blade in the first place. if you surface hardened the blade you'd probably end up grinding off the same amount of material, it might not really make a difference.

 

[LRB]

No. There are compounds for decarb protection. Check with Brownell's

 

[Nathan the Machinist]

No. It can actually cause pitting if used thin enough that oxygen can reach the steel in places. In fact I no longer use any product that contains salts in my oven to prevent contamination and pitting on future work.

 

[Nylunds knives]

Okay...

Guess it was just another one of my many bad ideas


Thanks again for taking your time and answering one of my questions!


Regards
Jakob

 

[Bruce Bump]

Brownells sells a great product called "PBC" for protecting high carbon steel from oxidation when heat treating simple high carbon steel.

 

[Nylunds knives]

Brownells sells a great product called "PBC" for protecting high carbon steel from oxidation when heat treating simple high carbon steel.

Yeah, I saw that. I just ordered ATP-641 anti scale compound from brownells.

I use a hot paint for my carbonsteels blades. It works great but is a bit hard to get of sometimes, you can get it of with acetone and a wirebrush right after the quench but if you leave it on when tempering you have to grind it of...



Regards Jakob

 

[Bruce Bump]

Yeah, I saw that. I just ordered ATP-641 anti scale compound from brownells.

I use a hot paint for my carbonsteels blades. It works great but is a bit hard to get of sometimes, you can get it of with acetone and a wirebrush right after the quench but if you leave it on when tempering you have to grind it of...



Regards Jakob

The ATP-641 ? Is it for higher temp like stainless steel heat treating?

 

[Nylunds knives]

The ATP-641 ? Is it for higher temp like stainless steel heat treating?

Yes, it's rated to 2300 I think, brownells has it.

I've heard both negative and positive comments about the product, mostly positive.

Not as good as ss foil but I think it will work for me and the way I heat treat. I have to test and see.

The powder you mention is also available as a high temp versions but it doesn't work that good together with steels that are high in chrome and vanadium. If the ATP don't work I will have to test the PBC powder.



Jakob