Again, all the CPM process does is prevent the carbides from clumping together in high alloy steels.
Finer carbides not grain.
The carbides form at the boundaries of grain or in the grain.
If they are huge nd clumping it reduces the ease of sharpening and toughness but not the wear resistance.
The grain size is affected by the heat treatment not the CPM
How much of a difference does CPM make to cruwear?
Depends how much sharpening and using one does.
Some may see huge gains. Some won't see any.
Not something you have to worry about. It's all CPM Cruwear now
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I am confused by some of your comments, hoping you might help to clarify for me.
Again, all the CPM process does is prevent the carbides from clumping together in high alloy steels.
I would add reduces clumping (segregation ) of all elements & alloys in the entire mix, including both primary & secondary carbides. I believe this is beneficial. Do you disagree?
Finer carbides not grain.
(Finer aka smaller) Therefore the overall surface area is greater (same volume of anything in smaller pieces nets greater surface area, thereby increasing bonding area - my previously posted concrete analogy comes to mind) and the blend is more homogeneous (uniform in structure or composition throughout its entirety), effectively less segregation (clumping) of elements & alloys in the mix. I believe this is beneficial. Do you disagree?
The carbides form at the boundaries of grain or in the grain.
If they are huge nd clumping it reduces the ease of sharpening and toughness but not the wear resistance.
The larger the clumping, the greater there is potential for dislodgement or de-socketing of the carbides that are exposed at the surface (apex as example, as well the bevels forming the cutting edge). Reduction of clumping (segregation) will make sharpening and toughness more consistent over life-cycle. Reducing potential for de-socketing of carbides at the cutting edge should increase wear resistance (provided we agree carbides in general increase wear resistance). I believe this is beneficial. Do you disagree?
The grain size is affected by the heat treatment not the CPM
If the blend is more homogeneous, the process of heat treatment & tempering will be more uniform and the resultant grain size will be more consistent. I believe this is beneficial. Do you disagree?
How much of a difference does CPM make to cruwear?
I'd say that is subjective.
Depends how much sharpening and using one does.
Total agreement.
Some may see huge gains. Some won't see any.
Total agreement (based on above - how much use).
Not something you have to worry about. It's all CPM Cruwear now
I freely admit, that I have no formal education in metallurgy. What have learned has taught me that I "know" less and less the more I learn (kind of seems to be a diminishing return on my investment ..., but there is a greater overall understanding). What I have learned is the blending of specific research for answers combined with first hand experiences (leave me continually asking why), and a fundamental need to understand the why and the how that goes along with the pure joy of using a tool first hand that just excels at a task.
I look forward to learning more about your perspectives on these things. I know you use your knives, as do I, and I respect those with first hand usage experiences. I hope to be able to hook up first hand with you and share some of your infatuation of putting Puukkos to wood (axes, tomahawks and all sharps included with respect to all).
Regards,
