Research On Machinability Of 26NiCrMoV10-10 Used For Nuclear Power High-pressure Rotor

Nuclear power equipment runs with high reliability and high security. Nuclear steam turbine rotor, as one of the key components, in order to ensure the integrity of whose machined surface, cutting tools performance and cutting processes are studied. 26NiCrMoV10-10 is used by Shanghai Turbine Factory as the material for nuclear high pressure rotor, with an average content of 2.6% C, 2.5% Ni, Cr 2.5%, belongs to low alloy steel. This metal is a not easy to machine material, with the properties of high strength, high hardness, high roughness, poor thermal conductivity, high resistance to cutting, wearing tools easily, producing great heat in cutting area, prone to thermal deformation and machining hardening, difficult in chip breaking during turning, twirling easily etc.This article searches and validates for machining properties of high pressure rotor material 26NiCrMoV10-10, completing its surface integrity analysis during cutting, verifies the impact of blade fillet radius, cutting speed, blade material and cutting edge technology on surface integrity. This article explores the chip breaking mechanism of high pressure rotor material 26NiCrMoV10-10, presents main principles to improve chip breaking by selecting chip breaker, optimizes the finishing tool related chip breaker selection and matching of processing parameters. Tools failure modes during cutting process are also analyzed here by theoretical analysis and testing for this material. Finally, cutting temperature and surface residual stress distribution are simulated by finite element technique for 26NiCrMoV10-10 cutting process.Based on the findings, the factory adjusted tool selection and process parameters appropriately.