Preparation process of alloy mold core for high-temperature alloy single crystal blade precision casting

A single crystal blade and preparation process technology, applied in other manufacturing equipment/tools, mechanical equipment, turbines, etc., can solve the problems of low yield, high scrap rate of alloy mold cores, and increased production cost of hollow-core turbine blades. High qualified rate of finished products, small deformation, small high temperature deformation effect
CN106001553BActive Publication Date: 2018-07-17ζŽεΊ†
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ζŽεΊ†
Publication Date
2018-07-17

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Abstract

The invention discloses a preparation process of an alloy mold core for high-temperature alloy monocrystal blade precision casting. Raw materials of the alloy mold core comprise metal powder and nonmetal powder; the metal powder is mainly prepared from cast iron fibers, tungsten powder, nickel powder, molybdenum powder and manganese sulfide powder in a mixed manner; and the nonmetal powder is mainly prepared from graphite powder, imine, polyethylene glycol, polyvinyl alcohol and ethylene bis stearamide in a mixed manner. The preparation process of the alloy mold core includes the following steps that the metal powder and the nonmetal powder are mixed in the proportion of 5:2; then the mixed powder is thrown into an acetone solution; an acetone solvent is removed in a heating manner; heating continues till 130 DEG C, and the mixture is fed into a mold to be pressed and formed; next, a machined mold blank is placed into a vacuum furnace to be subjected to degreasing, and sintering and forming are performed through hot pressing; and finally, the formed product is placed in a numerical control electrolytic machine tool to be subjected to precise electrolytic machining, and the alloy mold core is acquired. The alloy mold core acquired through the method is high in percent of pass of finished products, and the product is resistant to high temperature.
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Description

technical field

[0001] The invention belongs to the technical field of production and processing of alloy mold cores, and in particular relates to a preparation process of alloy mold cores for precision casting of high-temperature alloy single crystal blades. Background technique

[0002] In the existing precision casting process of high-temperature alloy hollow turbine blades, high-temperature-resistant ceramic materials are generally used to manufacture mold cores. Due to the extremely inactive chemical properties of ceramics, after precision casting, the removal of the mold core has become an insurmountable gap that restricts product design and manufacturing processes.

[0003] At the same time, since ceramics are hard and brittle materials, and the existing cavity design of hollow core blades is getting thinner and thinner, processing ultra-thin ceramic mold cores is a great challenge. When casting finished products, the scrap rate of the demoulding step of the alloy mo...

Claims

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