How to choose the milling cutter for stainless steel milling?
The characteristics of milling stainless steel are: the adhesion and fusibility of stainless steel are strong, and the chips are easy to adhere to the cutter teeth, which worsens the cutting conditions; In reverse milling, the cutter teeth slide on the hardened surface first, which increases the trend of work hardening; When milling, the impact and vibration are large, which makes the cutter teeth easy to crack and wear.
In addition to the end milling cutter and some end milling cutters which can be made of cemented carbide, other kinds of milling cutters are made of high-speed steel, especially tungsten molybdenum series and high vanadium high-speed steel, which have a good effect. The tool life can be 1-2 times higher than that of W18Cr4V. Cemented carbide grades suitable for stainless steel milling cutters are YG8, YW2, 813, 798, YS2T, YS30, YS25, etc.
When milling stainless steel, the cutting edge should be sharp and able to withstand impact, and the chip groove should be large. Large helix angle milling cutter (cylindrical milling cutter, end milling cutter) can be used, and helix angle B is from 20 ° Increase to 45 °（ n=5 °）， The tool life can be increased by more than 2 times, because the working rake angle G0e of the milling cutter is changed from 11 ° Increased to 27 ° Above, milling is light and fast. But b value should not be larger, especially when B ≤ 35 ° To avoid weakening the cutter teeth.
When machining stainless steel pipe or thin-walled parts with wave edge end mill, the cutting speed is light, the vibration is small, the chip is fragile and the workpiece is not deformed. High-speed milling with carbide end milling cutter and indexable end milling cutter can achieve good results in stainless steel milling.