Method for casting isometric crystal turbine work blade blanks

An equiaxed crystal and blade technology, applied in the field of axial crystal turbine working blade blank casting, can solve the problems of irreversible, not allowed to repair welding, scrapped blades, etc., and achieve the effect of improving metallurgical quality and mechanical properties

Inactive Publication Date: 2013-08-21
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because the blade body is a cast blade without margin, if there are loose defects inside, it cannot be removed by grinding and other methods, and the standard requires that repair welding is not allowed
Therefore, once loose defects occur inside the leaf body, the blade can only be scrapped and cannot be saved

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
  • Method for casting isometric crystal turbine work blade blanks
  • Method for casting isometric crystal turbine work blade blanks
  • Method for casting isometric crystal turbine work blade blanks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A blank casting method for equiaxed crystal turbine working blades: firstly, adopt bottom injection and top pouring pouring system; cast equiaxed crystal turbine working blades in groups, and each group of 4-20 working blades is distributed along the blade circumference; In the case of uniformity and uniform heat distribution (in order to ensure that the casting quality of each blade is consistent), in order to eliminate the loose defects inside the blade body, we paste the attached structure on the middle part of the blade back of each blade to be cast and connect it to the straight A feeding riser is formed on the runner, and finally a mixed pouring system of top injection, bottom injection and side injection is formed, so as to break the solidification sequence of the molten steel in the mold shell, so that the molten steel forms an effective feeding channel in the mold, and the The final solidification zone of the molten steel is lifted into the pouring riser and cut...

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

No PUM Login to view more

Abstract

The invention discloses a method for casting isometric crystal turbine work blade blanks. The method is characterized by firstly adopting a bottom pouring system and a top pouring system and comprising the following steps of: casting isometric crystal turbine work blades in groups, wherein each group comprises four to twenty work blades which are distributed along the blade circumference; then under the conditions of uniform and identical temperature and uniformly-distributed temperature, adhering an attachment structure to the middle of the back of each blade to be poured and connecting the attachment structure to a straight sprue to form a feeding head and eventually form a mixed pouring system of top pouring, bottom pouring and side pouring; and finally casting by using the mixed pouring system of top pouring, bottom pouring and side pouring so as to obtain the isometric crystal turbine work blade blanks. Through X-ray detection on blade cast produced by the method, the loose defect in the blades is eliminated completely and the requirements of a technical standard are met. The loose defect in the blades is eliminated and the metallurgical quality and the mechanical property of turbine blades are enhanced greatly.

Description

technical field [0001] The invention relates to the technical field of equiaxed crystal turbine working blade casting, and in particular provides a blank casting method of equiaxed crystal turbine working blade. Background technique [0002] In the past, the metallurgical standards of equiaxed turbine blades used in aviation allowed a certain degree of metallurgical defects inside the blade. However, with the increasing number of research and development projects of new types of aero-engines, the new-generation aero-engines urgently need to improve the working performance of gas turbine engines, and higher requirements are put forward for the performance and metallurgical quality of turbine blades. [0003] The mechanism of blade looseness: when the liquid metal fills the mold cavity, the liquid metal dissipates heat outward through the mold, and as the heat spreads out, the metal shrinks in liquid form, which may cause shrinkage cavities or cavities in the final solidified ...

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 Applications(China)
IPC IPC(8): B22C9/04B22C9/22
Inventor 王丽萍王铁军王永明冯文刚白素春
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap