Turning ductile iron 450-15 with what blade is good

Two options: 1) High-efficiency: Ceramics 2) Low-efficiency but cheap: Cemented carbide Ceramic: Green leaves HSN100, line speed can reach 600-1200 meters Carbide, that's too much, not to mention. However, some hard alloy materials can reach 350-400 meters line speed, but the price is certainly not low.

Wear-resistant stainless steel Ni9M2 Process diameter 60 deep 20 ball face~~ How to process? How long does it take? The equipment is a face milling machine, 600*300 high hollow cylindrical workpiece ~ to be processed on the round surface 300 holes How to row process selection What tool?
It can be considered to use a nesting drill, this is essentially a milling process, so the position should be no problem. In addition, the D60 hole can be designed as a clip-on blade type, which only consumes the blade, and the efficiency is also high and the cost is relatively low.

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