Both grey cast iron and ductile cast iron are very abrasive materials, but ductile iron is regarded as the more difficult one to machine. Ductile iron components can be various housings, shafts and other components mainly for the automotive segment.
Generally ductile iron is machined with carbide inserts, both roughing and finishing. When there are high requirements on dimensional tolerances and surface finish, PCBN can be an alternative for the finishing tool. The higher wear resistance of PCBN allows for longer tool life with maintained edge quality, resulting in superior tolerances and surface finish.
Rough milling is best done with wear resistant carbide grade. Seco’s range of milling grades for ductile cast iron include MP1500 and MK2050.
Depth of cut should be kept as low as possible, 0.1-0.3 mm. Cutting data is similar for carbide and PCBN, about 500 m/min, and feed rates will in finishing depend on surface finish requirement, but is in the range of 0.1 – 0.2 mm/tooth. Wiper technology will allow for higher feed rates while maintaining surface finish.
For more information, please contact your local Seco representative, or our PCBN team.
Product Specialist SECOMAX PCBN/PCD
SECO TOOLS Shanghai CO., Ltd. Level 2, Building 8, 456 HongCao Rd., Shanghai 200233, China
Office: +86 21 5426 5849
Mobile: +86 186 167 90063