METHOD FOR MANUFACTURING DRUM DISC SECTIONS OF TURBOMACHINE ROTOR Russian patent published in 2024 - IPC B23P15/00 B23K31/02 B23K15/04 C21D1/00 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of manufacturing turbomachinery rotors using electron beam welding, heat treatment and mechanical processing of locking surfaces, for example, a high-pressure compressor rotor of a gas turbine engine, the parts of which are made of a nickel heat-resistant alloy. The method for manufacturing drum disk sections of a turbomachine rotor consists in the fact that the disk blanks are assembled in an axial clamp with a centring sleeve, welded using electron beam action at the locking surfaces, forming a rotor section blank, which is placed in a shielded thermofix in the form of a belt. The fuser consists of a base made in the form of a disk with a rod, a cover and liners that fix the end sections of the rotor sections, while the lid of the fuser and the outer disk blank of the welded section are installed with a gap and fix it. Then the rotor section with the fuser is placed in a vacuum chamber and heat treated. Heat treatment occurs in stages in the following order: the rotor section assembled with a thermoset is heated in such a way that the temperature stresses arising in the section due to uneven heating do not exceed the yield stress of the material from which it is made, at a given stress-strain state, then hold for 60 to 90 minutes, then heated to a temperature at which the stress in the rotor section does not exceed the yield stress of the material in a given stress-strain state and held for 60 to 90 minutes, then heated to the hardening temperature and held for the time required to level the temperature field over the entire rotor section, after which the rotor section is cooled to a temperature of 400 °C and below in a cooling chamber in an argon environment. Then the locking surfaces are mechanically processed.

EFFECT: high quality and precision manufacturing of the rotor, increased reliability and increased service life of the turbomachine are achieved.

1 cl, 3 dwg