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Preparation method of seed crystal for superalloy single crystal blade with precise controllable three-dimensional orientation

A high-temperature alloy, three-dimensional orientation technology, applied in the direction of single crystal growth, single crystal growth, metal processing equipment, etc., to achieve the effects of good grain integrity, production cost savings, and convenient operation

Active Publication Date: 2020-08-14
ANHUI YINGLIU HANGYUAN POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the existing deficiency that the seed crystal cannot be accurately positioned and directional cut, the present invention proposes a method for preparing a seed crystal for a superalloy single crystal blade whose three-dimensional orientation can be precisely controlled. The cutting method can effectively guarantee the crystal orientation, and the operation is simple and convenient. The work efficiency is high, and at the same time, the casting qualification rate of parts is greatly improved, and the production cost is saved.

Method used

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  • Preparation method of seed crystal for superalloy single crystal blade with precise controllable three-dimensional orientation
  • Preparation method of seed crystal for superalloy single crystal blade with precise controllable three-dimensional orientation
  • Preparation method of seed crystal for superalloy single crystal blade with precise controllable three-dimensional orientation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Single crystal test bar design

[0043] Test rod design scheme such as figure 1 Make a set of precision casting module, which consists of five parts: test rod 4, crystal selector 5, sprue cup 2, pouring system 1 and chassis 3.

[0044] 2. Wax making

[0045] Control the wax temperature at 60°C and inject the wax into the single crystal test rod and the sprue mold under the condition of the wax injection pressure of 0.3MPa to obtain the part wax mold, the sprue cup wax mold, the chassis wax mold, the sprue wax mold, and the selected wax mold. crystal wax mold;

[0046] (3) Wax model tree

[0047] Combine parts wax molds, sprue cup wax molds, chassis wax molds, sprue wax molds and crystal selector wax molds according to the design scheme;

[0048] 4. Shell making

[0049] A 5mm-thick investment casting mold shell was coated on the surface of the wax pattern group, then steam dewaxed at 120°C, and baked at 600°C for 1 hour to obtain a single crystal oriented precis...

Embodiment 2

[0062] 1. Single crystal test bar design

[0063] Test rod design scheme such as figure 1 Make a set of precision casting module, which is composed of five parts: test rod part 4, crystal selector 5, sprue cup 2, pouring system 1 and chassis 3.

[0064] 2. Wax making

[0065] The temperature of the wax is controlled at 120°C, and the wax injection pressure is 20MPa and injected into the single crystal test rod and the sprue mold to obtain the part wax mold, the sprue cup wax mold, the chassis wax mold, the sprue wax mold, and the selected wax mold. Crystal wax mold.

[0066] 3. Wax model tree

[0067] Combining the part wax mold, sprue cup wax mold, chassis wax mold, sprue wax mold and crystal selector wax mold according to the design scheme.

[0068] 4. Shell making

[0069] A 15mm-thick investment casting mold shell was coated on the surface of the wax pattern group, and then steam dewaxed at 200°C, and baked at 900°C for 3 hours to obtain a single crystal oriented prec...

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Abstract

The invention discloses a preparation method of seed crystals for three-dimensional orientation accurate controlled high-temperature alloy single crystal blades. The preparation method comprises the steps of monocrystal test bar scheme designing, wax making, wax mold combination, shell making, smelting, preparation of monocrystal high-temperature alloy seed crystals and repeated using of the monocrystal high-temperature alloy seed crystals. The seed crystals prepared through the method is high in success rate, controllable in three-dimensional crystal orientation and accurate in orientation control, and the scrapping rate can be substantially reduced due to orientation deviation.

Description

technical field [0001] The invention relates to the technical field of precision casting of single-crystal high-temperature alloys, in particular to a method for preparing a seed crystal for high-temperature alloy single-crystal blades whose three-dimensional orientation can be precisely controlled. Background technique [0002] Aeroengines for aircraft are currently the most complex industrial machinery with the greatest difficulty in design and manufacture. They are called "the crown of industry". It is called "the jewel in the crown". However, single crystal parts have obvious anisotropy. When the primary crystal orientation of the crystal is consistent with the principal stress direction of the blade, the performance is the best. Therefore, it is generally required that the angle between the stress direction of the casting and its <001> direction should not be greater than 15°. At the same time, the secondary crystal orientation of the crystal also has a significa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04B22C9/22C30B29/52C30B35/00
CPCB22C9/04B22C9/22C30B29/52C30B35/007
Inventor 程干杜应流葛丙明戴勇冯文刚施长坤夏厚明程善良朱晓飞
Owner ANHUI YINGLIU HANGYUAN POWER TECH CO LTD
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