Unlock instant, AI-driven research and patent intelligence for your innovation.

Blade casting mold preparation method based on hollow/porous structure to suppress edge plate stray crystals

A porous structure and hollow technology, applied in the field of processing and manufacturing, can solve the problems of low qualified rate of single crystal turbine blades and mixed crystals of single crystal turbine blades, so as to avoid the defects of mixed crystals, uniform horizontal temperature field, and prevent local overcooling Effect

Active Publication Date: 2021-04-20
XI AN JIAOTONG UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation method of the blade casting mold based on the hollow / porous structure suppressing the miscellaneous crystals of the edge plate provided by the present invention solves the problem that the single crystal turbine blade has miscellaneous crystal defects in the preparation process, resulting in a low pass rate of the single crystal turbine blade

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Blade casting mold preparation method based on hollow/porous structure to suppress edge plate stray crystals
  • Blade casting mold preparation method based on hollow/porous structure to suppress edge plate stray crystals
  • Blade casting mold preparation method based on hollow/porous structure to suppress edge plate stray crystals

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] The method for preparing a blade casting mold based on a hollow / porous structure to suppress stray crystals on an edge plate provided by the present invention comprises the following steps:

[0043]Step 1. Design the 3D model of the directional solidification of the blade casting mold according to the blade model data. The 3D model includes the mold, furnace wall and water cooling plate model. Mouth; such as figure 2 ;

[0044] Step 2, importing the three-dimensional model obtained in step 1 into the finite element simulation software, performing discretization processing, and obtaining a discretized data model;

[0045] Step 3, importing the basic parameters for simulation in the discretized data model obtained in step 2 into the computer numerical simulation software to simulate the directional solidification process and extract the temperature change curve of the temperature measurement point;

[0046] Among them, the basic parameters for simulation include prehea...

Embodiment 1

[0058] Step 1, design the three-dimensional model of the directional solidification of the blade mold according to the blade structure, the three-dimensional model includes the casting, the mold and the simplified model of the furnace wall and the water cooling plate;

[0059] First of all, according to the size of the water cooling plate, complete the arrangement of the number and position of the molds, and require good heat dissipation conditions between the blades. After completing the arrangement of the blades on the water cooling plate, design the pouring riser and flow channel After the design, the design of the entire casting model is completed. Design the casting mold model based on the casting model, and it is required to control the uniform wall thickness of 6mm; finally, complete the establishment of the furnace wall model inside the directional solidification equipment according to the actual size.

[0060] Step 2, importing the three-dimensional model obtained in ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
heightaaaaaaaaaa
pore sizeaaaaaaaaaa
heightaaaaaaaaaa
Login to View More

Abstract

The preparation method of the blade casting mold based on the hollow / porous structure suppressing the edge plate miscellaneous crystals provided by the present invention can achieve control of the position of the edge plate during directional solidification by adding a hollow / porous structure at the position of the edge plate and rationally designing the size of the hollow / porous structure temperature field, prevent local overcooling, and avoid the occurrence of miscellaneous crystal defects at the edge plate position; edge plate miscellaneous crystals are the most common and main defects of single crystal blades, and the main cause of edge plate miscellaneous crystals is due to the The heat radiation is faster than that of the airfoil position, and the nucleation of local supercooling leads to the generation of miscellaneous crystals. The hollow / porous structure of the edge plate greatly reduces the heat radiation from the edge of the edge plate to the water cooling ring, thus ensuring the uniformity of the horizontal temperature field at the position of the edge plate during the directional solidification process, and can produce high-quality single crystal blades; through the use of additive manufacturing technology The core-shell integrated casting process combined with the gel injection molding process overcomes the shortcomings of the traditional investment manufacturing process that cannot be designed on demand and accurately for the casting structure.

Description

technical field [0001] The invention belongs to the field of processing and manufacturing, and in particular relates to a method for preparing a blade casting mold based on a hollow / porous structure for suppressing stray crystals on an edge plate. Background technique [0002] Castings with columnar grains and single crystal structures can be produced by applying the directional solidification process. Nickel-based superalloys are widely used in the production of turbine blades in aero-engines and industrial gas turbines due to their excellent creep resistance and high-temperature oxidation resistance. Since the single-crystal superalloy blades completely eliminate grain boundaries, the high-temperature creep of the blades is improved. Variable performance and fatigue performance have become the first choice for manufacturing high-performance aero-engines. One of the major problems currently encountered in the directional solidification of single crystal turbine blades is t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/22B22C9/02B29C64/379B29C64/386B33Y10/00B33Y40/00B33Y50/02
CPCB22C9/02B22C9/22B33Y10/00B33Y40/00B33Y50/00B29C64/379B29C64/386Y02P10/25
Inventor 鲁中良李涤尘刘哲峰周人治常涛歧苗恺王程冬连伟波
Owner XI AN JIAOTONG UNIV