Каталог Dormer Pramet фрезерование 2021 - 2022 - страница 7

9 WORKPIECE MATERIAL GROUPS (WMG) ISO To select a cutting grade and geometry for a broad range of workpiece materials General definition Subgroup for a more specific range of workpiece materials To navigate and select a tool by suitability i.e. Steel, Stainless Steel... P M K N S H Definition by structure/composition WMG To select and provide cutting conditions within a bandwidth of ± 10 % i.e. Plain Carbon Steel, Alloy Steel... Definition by hardness/ultimate tensile strength P M K N S H i.e. 160 < 220 HB, 620 < 900 N/mm2 ... P1 P P2 P1 P1.1 P1.2 P1.3 P3 P2 P2.1 P2.2 P2.3 P4 P3 P3.1 P3.2 P3.3 P4 P4.1 P4.2 P4.3 ABOUT DORMER PRAMET’S WORKPIECE MATERIAL CLASSIFICATION Workpiece Material Groups (WMG) are used to support easy and Each of these are divided into subgroups on the basis of their structure reliable selection of the right cutting tool and starting values for and/or composition. For example, P-group steel and cast steel is split machining conditions in particular applications. into four subgroups, namely; Dormer Pramet classifies workpiece materials into six different • P1 – Free machining steel coloured groups; • P2 – Plain carbon steel • Blue: Steel and cast steel (P-group) • P3 – Alloy steel • Yellow: Stainless steel (M-group) • P4 – Tool steel • Red: Cast iron (K-group) A final division includes material properties, such as hardness and • Green: Non-ferrous metals (N-group) ultimate tensile strength. This is to provide our customers with a • Brown: High-temperature alloys (S-group) complete tool recommendation, including starting values for cutting • Grey: Hardened materials (H-group) speed and feed. The table on the next page includes a description of each workpiece material group, as well as examples of commonly used designations. 6