A method for manufacturing ultrafine-grained, high-strength alloy blade forgings

Abstract

The invention provides a manufacture method for an ultra-fine grain and high-intensity alloy blade forged piece. The manufacture method for the ultra-fine grain and high-intensity alloy blade forged piece comprises the following manufacture processes of extruding, finally forging, cutting burrs and carrying out thermal treatment and is characterized in that a barium salt furnace is adopted to heat before the extrusion process; an extrusion die is a ''rhombic blade body and rabbet'' split-type square frustum structure; and the throat part of the extrusion die is strengthened. According to the manufacture method for the ultra-fine grain and high-intensity alloy blade forged piece, which is disclosed by the invention, the die design period and the product technology flow are shortened, the material consumption is lowered, and the cost is saved. Meanwhile, the mean grain size of the prepared forged piece performance tissue is less than the tenth grade, and the performance achieves the level of a high-strength forged piece.

Description

technical field [0001] The invention relates to the field of precision forging of high-temperature alloy blades, in particular to a method for manufacturing ultra-fine-grained, high-strength GH4169 alloy rotor blade forgings. Background technique [0002] Compressor blades are important working parts of gas turbines and aeroengines, especially high-pressure compressor rotor blades. Not only do they have to rotate with the compressor disk at a high speed of 3000~10000rpm for a long time, the heat and force conditions are complicated, and the blade body It is extremely thin, and the thickness of the inlet and outlet edges can even reach 0.2mm, so the requirements for material and structure performance are very strict; blade precision forging solves the problem of difficult machining of thin surface materials, and significantly improves the efficiency of blade processing. Forging technology is the comprehensive application of materials thermal processing, precision testing, sur...

AI Technical Summary

Problems solved by technology

[0004] It is difficult to achieve ultra-fine-grained, high-strength superalloy precision forged blades with traditional technological processes, and there is no room for adjustment in the process and heating methods. Therefore, it is necessary to optimize the design of the process and heating methods in the technological process. Manufactured blade forgings with an average grain size of tenons finer than grade 8, an average grain size of blade body finer than grade 10, and mechanical properties such as tensile strength and durability reaching the level of "high strength"

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