Cutting material for insert milling
Carbide grade cuts titanium alloys
Kennametal has developed a new cutting material for insert milling. According to the manufacturer, KCSM40 has an optimized cobalt binder, which results in high thermal resistance without sacrificing the toughness that customers are used to from KC725M or X500. In addition to the new substrate, the company's own AlTiN/TiN coating is said to increase wear resistance on the cutting edges.
The cutting speed to be achieved for KCSM40 on Ti6Al4V was 53 m/min, with a metal removal rate of more than 327 cm3/min, over an operating time of more than 60 minutes. At more moderate radial engagement widths, KCSM40 achieved very good tool life at cutting speeds of up to 85 m/min. Tests recently carried out by the manufacturer with the new end mills from the HARVI Ultra series resulted in a tool life of over 100 minutes at vc = 47 m/min and an average chip thickness hm = 0.12 mm per tooth. The radial cutting depth was 25 mm, the axial cutting depth 76 mm. The development of KCSM40 was primarily aimed at Ti6Al4V. The carbide grade is suitable for applications for structural components and engine components in the aerospace industry as well as turbine blades and assemblies made from duplex steel in the energy sector, but also for components in the automotive industry such as turbochargers. sw
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