I didn't find much detail on that Tungaloy grade, though the newer AH725 is probably it's improved version of a fairly tough PVD TiAlN-coated grade. I can't imagine any CCMT32.51 (CCMT 09T304 in ISO language) to be capable of a depth of cut that deep, no matter how tough it may be. The chipbreaker "24" appears to be a nearly flat, short-length to the ramp-up roughing geometry.
When you say that when you got the the continuous cut and "noticed that I wasn't making any chips.", just what WAS it making? Long stringy chips, perhaps? The reason it slowed you machine is probably that the insert top form geometry (chipbreaker) is so neutral/flat that it generated more force than your machine has torque to overcome. In a case like that, switching to an insert with a more upsharp geometry would cut with less force, and that's what the Iscar SM chipbrealer did for you rather than the grade. The IC907 is also a PVD (Physical Vapor Deposition) TiAlN coated carbide, but a much harder substrate of submicron-grain carbide for higher heat and wear resistance. It (IC907) is typically used in austenitic stainless steels and nickel-based superalloys.
With the Tunagloy 24 chipbreaker, if you were indeed starting to get long chips, then increasing feed rate is usually the remedy. Sometimes that won't work though. If you are already overriding the chipbreaker than higher feed just makes it worse.
As always, match the coating and grade to the material, match the chipbreaker to the depth of cut and feed rate for a given material.
When you say that when you got the the continuous cut and "noticed that I wasn't making any chips.", just what WAS it making? Long stringy chips, perhaps? The reason it slowed you machine is probably that the insert top form geometry (chipbreaker) is so neutral/flat that it generated more force than your machine has torque to overcome. In a case like that, switching to an insert with a more upsharp geometry would cut with less force, and that's what the Iscar SM chipbrealer did for you rather than the grade. The IC907 is also a PVD (Physical Vapor Deposition) TiAlN coated carbide, but a much harder substrate of submicron-grain carbide for higher heat and wear resistance. It (IC907) is typically used in austenitic stainless steels and nickel-based superalloys.
With the Tunagloy 24 chipbreaker, if you were indeed starting to get long chips, then increasing feed rate is usually the remedy. Sometimes that won't work though. If you are already overriding the chipbreaker than higher feed just makes it worse.
As always, match the coating and grade to the material, match the chipbreaker to the depth of cut and feed rate for a given material.