For milling stainless steel, except for end mills, some end mills, and cemented carbide as milling cutter materials, the other types of milling cutters generally use high-speed steel, especially tungsten, molybdenum and high-vanadium high-speed steel, which have good results. The durability is 1 to 2 times higher than that of W18Cr4V. Cemented carbide grades suitable for making stainless steel milling cutters are: YG8, YW2, 813, 798, YS2T, YS30, etc.
Stainless steel has strong adhesion and fusion, and the chips easily adhere to the cutting edge of the milling cutter, which deteriorates the cutting conditions; when up-milling, the cutting edge slides on the hardened surface first, which increases the tendency of work hardening; milling When the impact and vibration are large, the cutting edge of the milling cutter is prone to chipping and abrasion.
Using wave-edge end mills to process stainless steel pipes or thin-walled parts, cutting is brisk, vibration is small, chips are fragile, and workpieces are not easily deformed. High-speed milling with cemented carbide end mills and stainless steel with indexable end mills can achieve good results.
When milling stainless steel, down milling should be used as much as possible. The asymmetric down milling method can ensure that the cutting edge is smoothly cut away from the metal, and the chip bonding contact area is small, and it is easy to be thrown off under the action of high-speed centrifugal force, so as to prevent the chip from impacting the rake face when the cutter tooth re-cuts into the workpiece The phenomenon of spalling and chipping improves the durability of the tool.