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

A single crystal blade and preparation technology, which is applied in other manufacturing equipment/tools, turbines, engine components, etc., can solve the problems of increased production cost of hollow turbine blades, low yield, high scrap rate of alloy mold cores, etc., to achieve deformation Small size, high qualified rate of finished products, small deformation at high temperature

Active Publication Date: 2016-10-12
李庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, since ceramics are hard and brittle materials, and the existing cavity design of hollow blades is getting thinner and thinner, it is a great challenge to process ultra-thin ceramic cores
When casting finished products, the scrap rate of the demoulding step of the alloy core is high, which makes its yield low and increases the actual production cost of the hollow turbine blade

Method used

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  • Preparation process of alloy mold core for high-temperature alloy monocrystal blade precision casting
  • Preparation process of alloy mold core for high-temperature alloy monocrystal blade precision casting

Examples

Experimental program
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Effect test

Embodiment 1-3

[0042] Embodiment 1-3 The formula of metal powder and non-metal powder is shown in Table 1

[0043]

[0044] According to the above formula, put the metal powder and non-metal powder in a dry mixer and stir them thoroughly for 1 hour, and dry them in a dryer for 3 hours;

[0045] Then, put the fully dried and stirred powder into the acetone solution, and wet mix for 4 hours;

[0046] Next, place the wet-mixed raw materials in an oven and heat to remove the acetone solvent. After the acetone solvent is removed, place the raw materials after the solvent removal in a hopper and heat until the temperature of the raw materials is 130° C.;

[0047] Next, feed the raw material at 130°C into the mold with the heating device through the feeding device;

[0048] Then, start the press, press molding;

[0049] Next, take the formed workpiece out of the mold, because the workpiece has a certain temperature, it can be cut and processed, and then put the mold blank into the CNC equipmen...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/02B22F3/14B22F5/00B23H5/08
CPCB22F3/02B22F3/1007B22F3/14B22F5/007B22F2003/145B22F2999/00B23H5/08B22F2201/20
Inventor 李庆
Owner 李庆
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