Forging method of disc-shaped integrated part and die used for forging method

Abstract

The invention provides a forging method of a disc-shaped integrated part. The forging method comprises the steps of blanking by use of a sawing machine and processing by use of a lathe, applying a lubricant and heating for pre-forging, next, carrying out shot blasting and applying the lubricant after removing burrs by turning, heating for die forging, and then checking the quality of die forging at the junction of the turned disc and the rod, and if the quality is satisfied, drawing the rod to the final dimension by use of twice firing. The forging method is characterized in that the composite forging method of combined die forming and free forging is adopted for processing, in other words, the disc is formed by virtue of die forming, while the rod is drawn out by virtue of free forging, the targeting die for die forging is designed so that the deformation degree of the material can be effectively controlled and the deformation dead region can be avoided, the targeting spraying lubrication method is adopted so that the surface quality and the internal structure of a forged piece can be effectively controlled and the forged piece having excellent comprehensive mechanical properties can be obtained, and the quality stability of the forged piece produced by use of the disc-shaped integrated part such as a free turbine disc is guaranteed. The invention also provides a die for the method.

Description

technical field [0001] The invention relates to a forging method for aero-engine parts, in particular to a forging method for an integral structure of a disc-shaft of an aero-engine turbine disc part. The invention also provides a special mold for the above-mentioned method. Background technique [0002] The free turbine disc parts used in aero-engines are forged from superalloy materials (such as nickel-based superalloys). At the same time, the rod is extruded, so the tonnage and precision of the equipment are very high, and the quality control of forgings is very difficult. Foreign countries have imposed a technical blockade on our country. Therefore, it is currently difficult for our country to use this method to ensure the stable production quality of parts. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a forging method for an integral part of a disk shaft and a die used therefor, so as to reduce or avoid t...

AI Technical Summary

Problems solved by technology

[0002] The free turbine disc parts used in aero-engines are forged from superalloy materials (such as nickel-based superalloys). At the same time, the rod is extruded, so the tonnage and precision of the equipment are very high, and the quality control of forgings is very difficult. Foreign countries have imposed a technical blockade on our country. Therefore, it is difficult to ensure the stable production quality of parts by using this method in our country.

Images