Grinding burn mechanism of directionally solidified superalloy

Directionally solidified nickel-based superalloy DZ4 is an important struct ural material. However, the grinding burn occurs in grinding processes has hindered the grinding efficiency and dimensional accuracy. This paper inves tigates the grinding mechanism of this new type of superalloy based on the systematical analyses of variable characteristics of the grinding force, gr inding temperature, topography of ground surface, hardness distribution of surface layer, as well as morphology of surface layer from a metallographic al point of view. The results will be beneficial to grinding the superalloy with high efficiency and high precision.