Cold roll milling technology for rotor blade and stator blade of high pressure compressor for GH150 alloy

Abstract

The invention relates to a process for carrying out cold rolling on a moving blade and a stationary blade of a GH150 alloy high-pressure compressor. The process comprises a flow of a predominant process and a heat-treatment process: a semi-precision forging piece is subjected to solid solution and oil cooling; subsequently, a rabbet is machined and a root part of a blade body is milled; subsequently, the blade body is leveled and is subjected to primary cold rolling, argon charging and cold solid solution treatment in vacuum and secondary cold rolling till the blade body is rolled to have no residue; the blade body is charged with argon in a vacuum furnace and is subjected to the treatment of cold solid solution and cold sizing; and the rabbet and the gas inlet and exhaust edge of the blade body are subjected to polishing, fine machining, primary aging in the vacuum furnace, argon protection, secondary aging treatment and vibrating burnishing. The process has the advantages that engineering application research on a cold rolling technology of the blade is carried out, successfully working blades and rectifying blades with thirteen levels of the high-pressure compressor of an engine are developed; and the blade passes a cyclic vibration fatigue test under specified load and a long-term trial-run test of the engine.

Description

technical field [0001] The invention relates to a non-cutting manufacturing method of blade airfoil profile, and in particular provides a cold rolling process of GH150 alloy high-pressure compressed air motorized and stationary blades. Background technique [0002] GH150 alloy bar is a nickel-iron-chromium-based superalloy that is solid-solution strengthened by tungsten, molybdenum and other elements and aged by titanium, aluminum and niobium. The main strengthening phase is γ′. Through the analysis of the materials used, from the perspective of deformation and the analysis of the angle of the blade to obtain the required parameters, in order to avoid reducing the material strength characteristics and reducing the excessive difference in frequency characteristics, it is impossible to use the original process when processing the blade surface Production. Analyzing the technical-economic indicators of the final processing method, precision forging and cold rolling are the mos...

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Problems solved by technology

[0003] However, no research has been carried out on the cold-rolling technology of high-temperature alloy compressor working blades and rectifying blades with mortise. Our company has conducted research on the process of precision cold-rolling of blade airfoils made of domestic GH150 material without allowance. The purpose is to replace the import of the wearing parts of a certain overhaul blade, reverse the situation of being controlled by others, so as to better promote and apply to the manufacture of other types of third-generation new machine iron, nickel-based superalloy, single tenon compressor blades and fourth Preliminary Research on Compressor Blades of Modern Engines

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