The guide blade is mainly composed of nickel-based superalloy K4125

which is a typical difficult-tocut material. The understanding of grinding performance of K4125 can help to optimize the grinding process parameters and improve the material removal efficiency. In this article

the material property difference between K4125 and GH4169 is discussed firstly. Then

the grinding experiments are carried out. The grinding performances are compared on the basis of grinding force

grinding temperature

specific energy and surface roughness. The results show that the grinding force of K4125 is always higher than that of GH4169. The grinding temperature of K4125 is over 400 ℃

while the grinding temperature of GH4169 is lower than 200℃. Nevertheless

the phenomena of coating and redeposited chip on the ground surface of K4125 are more serious than that of GH4169. The size of the striation on the ground surface of K4125 is larger and the surface roughness of K4125 is larger. The grindability of K4125 is poorer than that of GH4169. The optimal grinding parameters is selected as follows: grinding wheel speed vs =25~30m/s

infeed speed vw =500~1000mm/min

grinding depth ap = 0.01~0.02mm.