Hamon on CPM 3v?

Could be possible David, he's having Bos doing his heat treating.
 
That's a little polishing trickery. It is heat treated by Paul Bos.
Paul Bos does not do differential hardening of blades.

Hoss
 
I'm not sure what is going on there. 3V is way too deep hardening, but I remember someone getting a hamon in A2 a few years back. I think it was Hartsfeld???? I see no reason to do this with 3V.
 
I think it's just etched and polished to appear like a hamon. (And done well)
 
I made a post on that thread and asked some questions. I also think it is just an etched faux-hamon, as is common on Chinese made Japanese style blades.

Here the main part of my post:


I have a few questions and comments.
Questions first:
1) How was the Heat Treatment done?
2) What company did the steel come from, and are you sure it is CPM3V?
3) Is the hamon an etched hamon made with a strong acid, or one polished to make it show, as in japanese yaki-ire and togi?

Comments:
BOS is not a steel type or a manufacturer, It is a method of melting scrap steel and making new steel in the steel industry. It is the Basic Oxygen Steelmaking process - BOS for short. This is the most common method for making the standard construction steel ( A36 and similar), but I am not sure if 3V is made by this process.
Marking the blade BOS will mislead many people to assume that the HT was done by Paul Bos at Buck Knife company.

A hamon is a differential hardening line that is the boundary between a hard martensite edge and a softer pearlite spine. It requires a low alloy and shallow hardening steel and a fast oil or water as the quenchant. 3V steel is high alloy and deep hardening. It is an air hardening steel, and should not attain a hamon by any normal methods.
 
Stacy E. Apelt - Bladesmith said:
I made a post on that thread and asked some questions. I also think it is just an etched faux-hamon, as is common on Chinese made Japanese style blades.

Here the main part of my post:


I have a few questions and comments.
Questions first:
1) How was the Heat Treatment done?
2) What company did the steel come from, and are you sure it is CPM3V?
3) Is the hamon an etched hamon made with a strong acid, or one polished to make it show, as in japanese yaki-ire and togi?

Comments:
BOS is not a steel type or a manufacturer, It is a method of melting scrap steel and making new steel in the steel industry. It is the Basic Oxygen Steelmaking process - BOS for short. This is the most common method for making the standard construction steel ( A36 and similar), but I am not sure if 3V is made by this process.
Marking the blade BOS will mislead many people to assume that the HT was done by Paul Bos at Buck Knife company.

A hamon is a differential hardening line that is the boundary between a hard martensite edge and a softer pearlite spine. It requires a low alloy and shallow hardening steel and a fast oil or water as the quenchant. 3V steel is high alloy and deep hardening. It is an air hardening steel, and should not attain a hamon by any normal methods.
Click to expand...

Stacy, that logo is one the Buck knives uses on their Paul Bos heat treated knives. I've noticed that Buck knives are copied alot in China. Makes you really wonder about the knife in that post...
 
Stacy was talking about the BOS inkjet mark on the raw material I believe, not the Bos flame logo on the finished blade.
 
DevinT said:
That's a little polishing trickery. It is heat treated by Paul Bos.
Paul Bos does not do differential hardening of blades.

Hoss
Click to expand...
Does BOS stamp/etch knives they have HT'ed? I'm not aware of them ever doing that.

Damn! That was my 10,000th post and I was saving it for something special. Awww...
 
The Bos heat treat logo comes from a common stencil, I've seen it many times over the years.

The Chinese buy steel bars that are fully pre hardened. They do all drilling and grinding after hardening. I think the rough bar is marked with the heat treater's name on it.

Looks to me like the knife was polished and then a resist was put on the edge and the body was bead blasted.

Hoss
 
The other BOS is a German company that makes shipping containers. The steel bar shown may be scrap from a shipping container that was in the salvage yard. Who Knows?

I have seen lots of Chinese blades with a fake hamon, fake makers marks or mei, and fake paperwork stating that they are genuine. I'm not saying this fellow is doing that (yet), but it seems suspicious.

My whole point is that the BOS HT logo is almost guaranteed to be a fake. If the answers from this chap don't seem reasonable, I will let the super mods deal with it.
 
I'd just like to know if he really has 5 fingers and a thumb (see maker's mark), that would be cooler than the hamon!
 
DevinT said:
The Bos heat treat logo comes from a common stencil, I've seen it many times over the years.

The Chinese buy steel bars that are fully pre hardened. They do all drilling and grinding after hardening. I think the rough bar is marked with the heat treater's name on it.
Hoss
Click to expand...
Devin is correct.

Chinese knifemakers buy lots of steel. Almost all of the steel goes to Paul Bos for heat treating. After heat treating, the steel is shipped to China. The knifemakers work the steel fully heat treated.

Chuck
 
No, I am positive it is either acid etched or sandblasted.
The fact that he responded to every comment, often in a few minutes, until he was asked specific questions by me and others about the steel and HT is also telling.
 
It's also entirely possible that it is a real hamon, and that it's not 3v...heck, it's possible that it's neither a true hamon nor 3v.
 
i also think it could just be another steel than the one claimed.
I have seen faux hamon before and it doesn't look like real like this
 
Well, his latest post is interesting.
He shows his emails with Paul Farner at Bos HT and shows the large batch of 36" steel bars he is having HTed. It also appears from his comment that someone else makes the knives for him. He asks if the Bos HT logo can be put on the blades by "my customer who make the blade". Paul says that is OK. ( unless the email is from the person importing the steel and he is "the person who make the blade?)

Who knows?
 
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