Forging technology of aviation engine blade based on nickel base superalloy

Abstract

The invention discloses a forging technology of an aviation engine blade based on nickel base superalloy and belongs to the technical field of aviation forging. The forging technology comprises the following steps:feeding, coating a bar with a lubricating agent, upsetting and heating, upsetting, cleaning a forging stock, coating the forging stock with the lubricating agent, carrying out finish forging and heating, carrying out finish forging, carrying out side cutting, correcting heating, correcting, cleaning a forge piece, and carrying out thermal treatment and final inspection. The aviationengine blade forged through the forging technology disclosed by the invention is fine and uniform in crystalline grain, and the grain size is grade 9-10; the phenomena that nickel base superalloy is likely to have coarse grain and / or mixed crystal during the forging process are overcome, and the tensile strength can reach 200KSI or above; the forge piece of the blade is complete in outline and isfree of defects including crack, fold and the like, and the machining allowance, mechanical property and the metallographic structure meet the design requirements.A novel selection approach is provided for producing the nickel base superalloy based engine blade with fine and uniform crystalline grain and high tensile strength; and the blade forge piece product can meet the using requirements of the shape and the size of the aviation engine blade.

Description

technical field [0001] The invention relates to a forging process, more specifically, relates to a new forging process of an aero-engine blade based on a nickel-based superalloy material, and belongs to the technical field of aeronautical forging. Background technique [0002] With the continuous improvement of the use and requirements of aero-engines, the requirements for the performance and blade profile of aero-engine blade materials are also getting higher and higher. Nickel-based superalloy (INCO718) is a nickel-based superalloy material that is precipitated and strengthened by body-centered square γ” and face-centered cubic γ’ terms. The following yield strength ranks first in the deformed superalloy, and has good fatigue resistance, radiation resistance, oxidation resistance, corrosion resistance and long-term structural stability, so it is widely used in the field of aero-engine blade manufacturing; nickel-based superalloy materials are also Another feature is that ...

AI Technical Summary

Problems solved by technology

In the current forging process of the nickel-based superalloy material, forged product forging blades are prone to coarse grains and / or mixed crystals, so the qualified rate of the finished forgings is low, and the quality of the finished forgings is poor, and even the forgings are scrapped.