Özet:

In this study, DIN 1.2344 hot work steel which was hardened at 51 HRC hardness value was processed by using high-speed milling technology, and different milling parameters with 6 mm-diameter spherical endmill and the surface qualities which were obtained as a result of milling were examined. Axial and radial feed values, feed value per tooth and depth of cut were changed between the range of 0.05 and 0.1 mm and the rate of cutting was changed between the range of 485 rpm and 4,000 rpm. These millings were carried out on material in the spherical form of which diameter was 21 mm, and the central angle was 150º. Also, milling directions were processed in different ways as climb milling, conventional milling and bidirectional milling in experimental cuttings. Surface roughness was examined in directions with 15º, 45º, 75º, 90º, 105º, 135º and 165º central angles on the material which was processed. The best surface quality was achieved in regions with 15º and 45º angles

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