I am still in the design phase of two relativly small parts both with a 2 1/2" machined bore. They are part of a concrete pumping system, I am looking to reduce the abrasive wear by preconditioning the surface to 500-600 bhn. I am concerned that the flowing concrete will not create enough "impact" to work harden the surface without the preconditioning. They will be consumable parts so cost is somewhat of a concern. Thanks for the info on UIT, looks pretty interesting.
For concrete pumping machine parts, normally high chrome or NiHard will be better suited. They have high wear resistance, toughness and withstand corrosion better(relatively).
Arunmaro,
Hadn't thought of it. These parts are prototypes and even in production will be pretty low quantities. NiHard appears to be a casting alloy only, can it be purchased in bar stock and machined? Casting just a few will be really expensive.
I have worked with Hadfield in the past, I guess I was falling back on what I knew.
A Cr white iron or NiHard will have to be cast, they are nearly non-machinable they are so hard.
If the parts are a cylinder then casting shouldn't be a big deal.
You might look at explosive hardening if you need to do an ID surface. It works well.
