The new PVD multi-layer coated carbide milling grades MP6100, MP7100 and MP9100 developed using the very latest MIRACLE SIGMA PVD coating technology have been specifically designed to offer uncompromised machining performance on specific materials such as steels, stainless steels and heat resistant super alloys.
The accumulated layers of AlTiCr-N based PVD coatings provide extremely high levels of wear, heat, fracture and welding resistance at high speeds and feeds. There are over 50 new geometries with different coatings and chipbreaker types available that are compatible with the AJX, APX and ASX milling cutters and offer an increase in tool life to substantially boost performance and productivity.
Mitsubishi Materials has launched an exciting new range of PVD coated carbide milling grades; MP6000 Series is optimized for machining steel, MP7000-Series is designed for cutting stainless steels and MP9000-series is ideal for milling difficult to cut materials such as heat resistant and titanium alloys. These new grades are able to maximize productivity by enabling the optimum insert to be chosen according to the application, without a compromise in cutting conditions that is sometimes necessary with a general purpose grade.
The new grades use the very latest MIRACLE SIGMA PVD-coating technology that utilizes accumulated layers of AlTiCrN based PVD coatings to provide extremely high levels of wear, heat and welding resistance that was not possible with older coatings.
Indexable insert milling applications naturally have intermittent contact with the workpiece that can cause problems such as thermal cracking of carbide inserts, especially during wet cutting. However the multi-layering of the new coating helps prevent any crack propagation through to the carbide substrate, this in turn dramatically improves the overall fracture resistance of the insert. Mitsubishi has called this feature, TOUGH-Σ technology.
MIRACLE SIGMA technology has been used across all the new grades but has been adapted and optimized for each type. The MP6000 inserts have an Al-Cr top coating that offers the best solution for wear and welding resistance to steels. The MP7000 type is slightly different because it has a smooth Ti top coating that was found to be the best option when machining stainless steels. The MP9000 series; for heat resistant and titanium alloys, employs an outermost layer of Cr that provides the lowest coefficient of friction coupled with the best heat and wear resistance for this application group.
The new grades are available in several different geometries and chipbreaker styles to suit Mitsubishi‘s range of high performance milling cutters. Over 50 different insert types are available for the range of face- and shoulder milling cutters.
MP6100: PVD multi-layer coated carbide milling grades for ISO-P material group. High wear and thermal cracking resistance allows higher cutting speeds compared to conventional PVD coated carbide grades.
MP7100: PVD multi-layer coated carbide milling grades for stainless steels. With high resistance to thermal cracking and a smooth surface to prevent chip welding.
MP9100: PVD multi-layer coated carbide milling grades for heat resistant super alloys. With high resistance to thermal cracking and a smooth surface to prevent chip welding.