Nov 19, 2021
How to machining superalloy?
Because the high temperature strength of superalloy is high, the work hardening is serious, and the superalloy contains many hard points composed of metal carbide, nitride, boride and intermetallic compounds, especially the micro particles composed of phase, so the mechanical friction and wear is serious. Not only that, because of the cutting force, high cutting temperature, under high temperature and high pressure, a chip interface bonding, resulting in bonding wear. In addition, at a higher cutting temperature, the diffusion of some alloying elements (such as tungsten, cobalt, titanium, niobium, etc.) in the material with the upper part and chip is intensified, resulting in diffusion wear. At the same time, under the condition of high temperature, carbon, hydrogen, oxygen, nitrogen and other elements in the surrounding medium are easy to immerse into the cutting interface, resulting in the formation of the corresponding brittle phase of the material, increasing the stress concentration of the surface tissue of the material, resulting in cracks, and even edge collapse. In the process of grinding superalloy, the abrasive grains of grinding wheel not only have serious wear but also have serious adhesion blockage.
