I'm looking for some help selecting a material for what's called a Rushton Turbine impeller (if you do a quick google search, you'll see it). The application is to mount the impeller to a motor shaft and use it to blend soil and water to make a slurry to use for soil analysis. We've currently been using one that is 316L SS, and we find that the blade wears very quickly (after only 500 cycles, it had shed 5% of its mass). So I'm thinking we need a harder material, but I'm not a materials expert, so I was hoping for some help. As I said, it will be used to blend soil with water at 3450 RPM speed, and so it is a very abrasive application. Any suggestions on a better material to use? Thank you!!
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