- Joined
- Aug 25, 2003
- Messages
- 1,466
I curious about this subject, as I have I have a good quantity of ex-mystery metals, namely band saw blade and pallet strap. I got the band saw blade over the period of a few years from my ex-work place (out of the dumpster 
). The company always bought the same model blade from the manufacturer, I can't remember the company name, but the blade is called "Cobra" a bi-metallic blade and they had 5 saws running 2 shifts, the pallet strap also from the dumpster, the coil had become partially unrolled from the middle and they trashed :jerkit:.
As was just recently brought up, that you can quench after reaching austenitic with low C strap or blade and it will become brittle and break with very little effort.
The following link goes to pretty much the results of the forging and the HT of the pattern-welded billet. http://tbladeforge.com/Metallurgy.html
My questions are, even though I can get a typical RHC for a very efficient edge, will the medium carbon result in loss of wear resistance and increase in toughness? If so, it sounds like a recipe for larger blades. Also, if a blade were made without tempering (sheet martensite?) would there be a dramatic loss of flexibility?
Not on the web is the fact that I quenched this steel literally in a bucket of ice water. In the past I had used oil quench, and I never was really satisfied with the edge holding ability, dont get me wrong it would always stay cutting sharp adequately, but would loss razor sharpness rather quickly.
While testing the preview I noticed that you can see the hardness marks along the edge of the blade and one right up by where your index finger will be, cool.
Thanks in advance for your input.
). The company always bought the same model blade from the manufacturer, I can't remember the company name, but the blade is called "Cobra" a bi-metallic blade and they had 5 saws running 2 shifts, the pallet strap also from the dumpster, the coil had become partially unrolled from the middle and they trashed :jerkit:. As was just recently brought up, that you can quench after reaching austenitic with low C strap or blade and it will become brittle and break with very little effort.
The following link goes to pretty much the results of the forging and the HT of the pattern-welded billet. http://tbladeforge.com/Metallurgy.html
My questions are, even though I can get a typical RHC for a very efficient edge, will the medium carbon result in loss of wear resistance and increase in toughness? If so, it sounds like a recipe for larger blades. Also, if a blade were made without tempering (sheet martensite?) would there be a dramatic loss of flexibility?
Not on the web is the fact that I quenched this steel literally in a bucket of ice water. In the past I had used oil quench, and I never was really satisfied with the edge holding ability, dont get me wrong it would always stay cutting sharp adequately, but would loss razor sharpness rather quickly.
While testing the preview I noticed that you can see the hardness marks along the edge of the blade and one right up by where your index finger will be, cool.
Thanks in advance for your input.