S125V 66rc Chopper

[BluntCut MetalWorks]

well you'd probably get the same result with any hypereutectoid steel. welding results in local coarse grain + untempered martensite, without post treatment (hammering, normalizing, tempering. not to mention hydrogen absorbtion issues) it is almost like grinding a notch into the blade - guaranteed fracture line.

Agreed. In my mind - Molten/liquidous temperature induces many undesirable properties, especially size changes upon cooling would tear/propagate fracture line in affected zone to release stretch pressure.

 

[Someone1]

I will make a S125V (3.3%Carbon) chopper with specs: 2.25"W x 0.275" Thick, 15" OAL, 64-65rc, 18dps, ~0.025" behind edge thickness

After testing, its dimension will meets BladeSports specs.

It might be the first chopper in the world in s125V steel. it would be interesting/educational to evaluate proof of HT 6.0 concept.

Test via my maximum chop speed at tasks: 2x4, hardwoods and very high janka woods, dried pork rib bone, [ your susggestions ? ]. Performance = 'A' no visible damage, 'B' no chip/damage larger than 0.5mm tall, 'C' 1mm, 'F' otherwise.

I placed an order for a bar of s125V from nsm , sufficient length for making 2 choppers.

Thoughts?

I'm happy to see you still going.

 

[BluntCut MetalWorks]

Let's how a straight razor edge geometry (7 degrees per side edge geometry) made out of 67rc S125V perform in cutting 1" diameter sisal rope and whittle bamboo chopstick.

6:48 video

Metal Sequencing Research is ongoing with S125V. Most of my posts are in this thread: https://www.bladeforums.com/threads/heat-treatment-crystal-weaving-foundation.1409721/post-20685410

FYI nsm