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Seeding device for optimizing directional solidification temperature field distribution of single crystal blade and application thereof

A technology of directional solidification and single crystal blades, applied in self-solidification, single crystal growth, single crystal growth, etc., can solve the problems of single crystal blades with mixed crystals, poor control of temperature field, freckles, etc., and achieve reduction Miscellaneous crystals, improving the casting pass rate, and increasing the effect of temperature gradient

Pending Publication Date: 2021-09-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of casting defects such as miscellaneous crystals and freckles in single crystal blades due to the lack of good control of the temperature field in the existing single crystal blade casting process, and to provide an optimized single crystal blade directional solidification temperature field Distributed seeding device and its application

Method used

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  • Seeding device for optimizing directional solidification temperature field distribution of single crystal blade and application thereof
  • Seeding device for optimizing directional solidification temperature field distribution of single crystal blade and application thereof
  • Seeding device for optimizing directional solidification temperature field distribution of single crystal blade and application thereof

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] figure 1 It is a schematic diagram of the traditional directional solidification process. During the solidification process, the temperature field is not uniform due to the poor heat dissipation of the "shadow side" of the blade body. To solve this problem, the present invention provides such figure 2 Shown is a seeding device that can optimize the temperature field distribution of single crystal blade directional solidification by enhancing the vacuum radiation heat dissipation on the "shadow side" of the formwork.

[0033] Such as figure 2 , the seeding device is mainly composed of an annular chilling plate 21, a chilling plate pull ring 22, a chilling plate moving mechanism, a cooler 23, a cooler pull rod 24, and a cooler moving mechanism. The diagram of the chilling plate moving mechanism and the cooler moving mechanism not sho...

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Abstract

The invention relates to a seeding device for optimizing directional solidification temperature field distribution of a single crystal blade. The device comprises an annular chilling plate arranged at the bottom of a ceramic mold shell; a chilling plate drawing ring connected to the annular chilling plate and connected with an external chilling plate moving mechanism, so that the independent movement of the annular chilling plate is realized; a cooler arranged at the upper part of the annular chilling plate in a manner of moving up and down; and a cooler drawing rod connected to the cooler, sleeved in the chilling plate drawing ring, andconnected with an external cooler moving mechanism, so that the cooler can independently move in the cooler relative to the ceramic mold shell. According to the device, heat of the 'dark side' of the blade body is taken away through vacuum radiation heat dissipation, and the cooling speed is increased, so that the overall temperature field in the directional solidification process of the blade is optimized.

Description

technical field [0001] The invention belongs to the field of single crystal superalloy preparation, and in particular relates to a crystal seeding device for optimizing the distribution of the directional solidification temperature field of a single crystal blade and its application. Background technique [0002] The high-pressure turbine blade is the core hot-end part of an aero-engine, and its temperature-bearing capacity is an important indicator of the advanced level of an engine. With the rapid development of the modern aviation industry, the high-temperature performance requirements for high-pressure turbine blades are getting higher and higher. Existing studies have shown that directional solidification, film cooling and thermal barrier coatings are the main ways to improve high-temperature performance of high-pressure turbine blades. During the directional solidification process, a superalloy melt is poured into a heated ceramic mold and then pulled out of the furna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B11/00C30B29/52B22D27/04
CPCC30B11/003C30B29/52B22D27/045
Inventor 曾龙夏明许王斌强李建国
Owner SHANGHAI JIAO TONG UNIV
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