comments on this barung lamenation?

tom hyle · 6th June 2005, 10:14 AM

Thanks. Federico, that's just what I wanted to know. Still pretty far at sea as to what's going on with the spine of your sword, Rick; my guess is still that there is an applied spine whose internal structure (the stripe) is incidental and of no particular relation to the rest of the blade, but it's crossed out of anything I personally have seen or can readily explain in practical terms without further knowlege (ie sword in hand, 1/2 a cigarette and some good staring, and I could probably tell you A LOT more, and be much more certain about it; it's really hard to work from photos in these matters; much must be guessed at and interpretted.). I don't think Gt Obach's idea that applied edge and spine are the same (butt welded) piece is correct: it seems an uncharacteristic waste of edge steel, but I suppose it's possible. I can't tell from the picture whether there is indeed a central stripe of another alloy on the spine, or whether such is deliberate, or whether it's just a randomish variation in folded grain. I'm not seeing a real distinct stripe; I kinda sorta see one; that could be the photo.......

Gt Obach · 6th June 2005, 04:25 PM

bizarre... I'm changing my opinion..... looking at the spine of Rick's knife I am agreeing with Tom...

- the edge was and spine was formed by inserting the core (with a scarfed edge) into a "V" shaped steel bar .... then welded shut

- this is revealed on the spine....... the flat of the spine is ground in.... removing the tip/edge of the steel in order to expose the core material...
- so when looking at it from the spine you see two steel outer plates with a black line/central core showing or exposed..

at first I was opposed to this view......it is alot of work, and I can see no gain from it to justify the extra work.....

-also..... a buttweld is not weaker..... if properly scarfed, clean surface, fluxed with borax.....and heated to proper temp........ hammered with proper pressure...... ... solid phase welding will occur !
- this process is done with numerous swords (euro's)

just goes to show you.........there are many paths to producing laminates

Greg

6th June 2005, 10:14 AM	#1
tom hyle Member Join Date: Dec 2004 Location: Houston, TX, USA Posts: 1,254	Thanks. Federico, that's just what I wanted to know. Still pretty far at sea as to what's going on with the spine of your sword, Rick; my guess is still that there is an applied spine whose internal structure (the stripe) is incidental and of no particular relation to the rest of the blade, but it's crossed out of anything I personally have seen or can readily explain in practical terms without further knowlege (ie sword in hand, 1/2 a cigarette and some good staring, and I could probably tell you A LOT more, and be much more certain about it; it's really hard to work from photos in these matters; much must be guessed at and interpretted.). I don't think Gt Obach's idea that applied edge and spine are the same (butt welded) piece is correct: it seems an uncharacteristic waste of edge steel, but I suppose it's possible. I can't tell from the picture whether there is indeed a central stripe of another alloy on the spine, or whether such is deliberate, or whether it's just a randomish variation in folded grain. I'm not seeing a real distinct stripe; I kinda sorta see one; that could be the photo.......

6th June 2005, 04:25 PM	#2
Gt Obach Member Join Date: Mar 2005 Posts: 116	bizarre... I'm changing my opinion..... looking at the spine of Rick's knife I am agreeing with Tom... - the edge was and spine was formed by inserting the core (with a scarfed edge) into a "V" shaped steel bar .... then welded shut - this is revealed on the spine....... the flat of the spine is ground in.... removing the tip/edge of the steel in order to expose the core material... - so when looking at it from the spine you see two steel outer plates with a black line/central core showing or exposed.. at first I was opposed to this view......it is alot of work, and I can see no gain from it to justify the extra work..... -also..... a buttweld is not weaker..... if properly scarfed, clean surface, fluxed with borax.....and heated to proper temp........ hammered with proper pressure...... ... solid phase welding will occur ! - this process is done with numerous swords (euro's) just goes to show you.........there are many paths to producing laminates Greg