Manufacturing process method for ceramic rotor type parts

Abstract

The invention relates to a manufacturing process method for ceramic rotor type parts which are large in number of blades, complex in blade type structure and small in structure size and are made of high-temperature resisting hard and brittle ceramic. The manufacturing process method solves the problems that for existing ceramic rotor type parts, the manufacturing scrap rate is high, the manufacturing efficiency is low, and material performance cannot meet working demands. The manufacturing process method comprises the steps that the dimension of a part model is scaled up; a part blank is subjected to static pressure to be formed and prepared; a part is roughly machined through the milling process; the part is subjected to secondary high-temperature sintering to be compact; part blades are subjected to finish machining through the grinding process, and manufacturing is completed. According to the manufacturing process method, the machining efficiency is improved by 3-6 times, the scrap rate is decreased, and the quality reliability is improved; the tensile strength of the blades is up to 350 MPa, the blade profile precision is 0.08 mm, the dynamic unbalance value reaches 0.8 g.mm / Kg, and the surface roughness is smaller than 0.5 micrometer. By means of the method, a ceramic rotor large in number of blades and complex in blade profile structure is manufactured.

Description

technical field [0001] The invention relates to a manufacturing process of ceramic rotor parts, in particular to a manufacturing process of rotor parts made of high-temperature resistant ceramic materials with complex blade shapes, a large number of blades, a thinner blade structure, and materials with higher hardness and lower fracture toughness. method. Background technique [0002] Rotors are key components of gas turbines and aerospace vehicle engines, and their traditional manufacturing materials are metal materials such as stainless steel, titanium alloys, and high-temperature alloys. With the improvement of engine performance requirements, problems such as high density of metal materials, high balance of rotor moving parts, poor high temperature resistance, and serious cavitation have become more and more prominent. High-temperature-resistant ceramic materials can have high strength and hardness in high-temperature environments, and at the same time have the characte...

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Problems solved by technology

[0003] Through the literature search of the existing technology, it is found that the manufacturing of complex airfoil structure ceramic parts at home and abroad mostly adopts a one-time molding process, such as the NT154Si 3 N 4 The material is molded by slurry casting method under pressurized conditions to develop ceramic turbine blades. Aerospace 43 also uses slurry casting method to prepare rotors for gas turbines. The ceramic rotor developed by this method has a high scrap rate and is mainly aimed at Manufacturing of ceramic rotors with relatively simple structure and fewer blades; at present, especially the rotors used in aerospace vehicle engines, the number of blades is larger and the blades are thinner

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