Molding method of nickel base high-temperature alloy low-allowance blades

Abstract

Nickel-based superalloys have good hot workability and superior gold comprehensive properties, and can be used in the production of high-strength disc forgings. The present invention proposes a forming method of nickel-based superalloy blades with small margins, vibrating light decoration, special extrusion die and fire for extrusion die forging, etc., which can increase the material utilization rate to more than 60-70% , which saves the cost and should reach the level that the grain size difference between the tenon and the blade body is less than or equal to 2 levels. To a certain extent, the forming method can make up for the mass production of blades with small margins of nickel-based superalloys.

Description

technical field [0001] The invention belongs to the technical field of forging, and relates to a forming method of a nickel-base superalloy small margin blade. Background technique [0002] With the development of domestic forging technology, more and more small blades are processed with small allowances. These products have extremely high requirements on surface quality, shape and size. However, the existing die forging blades have relatively large margins, large material consumption, and high machining costs; in order to solve the above problems, we usually use the forging method of small margin blades, and the tolerance margin of small margin blades (semi-precision forged blades) The amount is about 1 / 3 of ordinary die forgings; mass ratio (ratio of forging mass to finished parts): die forgings are about 3, while small margin blades are 1.2-1.7; surface roughness can reach Ra1.6-3.2; Percentage of surface to be machined: 60% to 80% for die forgings, and <30% for forgi...

AI Technical Summary

Problems solved by technology

However, the existing die forging blades have a relatively large margin, large material consumption, and high machining costs; in order to solve the above problems, we usually use the forging method of small margin blades, and the tolerance margin of small margin blades (semi-precision forged blades) The amount is about 1 / 3 of ordinary die forgings; mass ratio (ratio of forging mass to finished parts): die forgings are about 3, while small margin blades are 1.2-1.7; surface roughness can reach Ra1.6-3.2; Percentage of surface to be machined: 60% to 80% for die forgings, and <30% for small margin forgings

Images