Каталог Dormer Pramet фрезерование 2021 - 2022 - страница 7

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9 WORKPIECE MATERIAL GROUPS (WMG) ISO To select a cutting grade and geometryfor a broad range of workpiece materials General definitioni.e. Steel, Stainless Steel...Subgroup To navigate and select a tool by suitabilityfor a more specific range of workpiece materials P M K N S H Definitionby structure/composition WMG To select and provide cutting conditionswithin a bandwidth of ± 10 % i.e. Plain Carbon Steel, Alloy Steel... Definition P M K N S H by hardness/ultimate tensile strengthi.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