I have a batch of Fjord hikers at HT right now in Z wear. This is the first batch that I will be doing in this steel and I have not had a chance to test it yet but I've done very, very extensive research on the HT protocol for this steel. I've decided to run it in the 60-61 range and avoid the secondary hardening curve that occurs at 62. Secondary hardening results from the precipitation of tungsten carbides. This precipitation creates very hard carbides but actually reduces the hardness of the matrix which can be detrimental to the ability to hold a thin edge, and I always take my edges as thin as possible.
In the 60-61 range, the steel will have a very strong matrix and have lots of carbide formation for wear resistance. From what the metallurgists at Zapp told me, at 61, Z wear will be as tough at 3V but have greater wear resistance. I'm going to have 2 of them run at 62-63 and test the secondary hardening bump but from all the info I've gathered, 61 is looking like the sweet spot for this steel.
I'm very excited to finally test out z wear as I think it will be an upgrade to 3V in smaller knives. And at the very worst, it will be about the same as 3V.