Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A heat treatment method for K465 alloy turbine blade to restore performance

A heat treatment method and turbine blade technology, applied in the field of metallurgy, can solve the problems such as no precedent for the performance recovery of K465 alloy turbine blades, and achieve the effect of strong operability and easy operation

Active Publication Date: 2016-03-02
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no domestic precedent for K465 alloy turbine blade performance recovery

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
  • A heat treatment method for K465 alloy turbine blade to restore performance
  • A heat treatment method for K465 alloy turbine blade to restore performance
  • A heat treatment method for K465 alloy turbine blade to restore performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A K465 alloy turbine blade recovery performance heat treatment method is carried out according to the following steps:

[0030] (1) Blade loading: Put the K465 alloy turbine blades that have served for one life into the vacuum furnace perpendicular to the surface of the fixture; figure 1 or figure 2 shown;

[0031] (2) Heat preservation after heating up with the furnace: under the protection of inert gas, the vacuum furnace is powered from room temperature, heated and heated up with the furnace, kept at 950 ° C ~ 960 ° C for 40 minutes, kept at 1190 ° C ~ 1200 ° C for 2.5 hours, and heated from room temperature To 1230°C, the entire heating time should be controlled within 6.0h; keep warm at 1230°C for 4h;

[0032] (3) Cool down with the furnace: under the condition of cooling rate of 40±25°C / min, cool from 1230°C to 1000°C, and cool with inert gas partial pressure; at 1000°C, fill inert gas and cool to 300°C, the cooling rate is equivalent For air cooling, the air ...

Embodiment 2

[0040] Example 2 is basically the same as Example 1, the difference is: (2) heat preservation after heating up with the furnace: under vacuum, the vacuum furnace is powered from room temperature, heated and heated up with the furnace, and kept at 950 ° C ~ 960 ° C for 45 minutes. Keep warm at 1190°C~1200°C for 2 hours, heat from room temperature to 1230°C, the whole heating time should be controlled within 5.5h; keep warm at 1230°C for 4.5h,

[0041] After K465 alloy undergoes recovery heat treatment at 1230℃ for 4.5h, its microstructure is Figure 4 (b) transforms into Figure 4 (e), its mechanical properties are shown in Table 3; the morphology of intragranular γ′ is restored from polygonal or flower basket to cubic, and its morphology is more square than that before heat treatment. It can be seen from Table 3 that its mechanical properties meet the requirements of technical conditions.

[0042] Table 3 Mechanical properties after heat treatment

[0043]

[0044] After...

Embodiment 3

[0046] Example 3 is basically the same as Example 1, the difference is: (2) heat preservation after heating up with the furnace: under vacuum, the vacuum furnace is powered from room temperature, heated and heated up with the furnace, and kept at 950 ° C ~ 960 ° C for 43 minutes. Insulate at 1190°C~1200°C for 2.2 hours, heat from room temperature to 1230°C, the entire heating time should be controlled within 5.7 hours; keep at 1230°C for (4~4.5) hours.

[0047] After testing, after heat treatment for recovery performance, the morphology of intragranular γ′ recovers from polygonal or flower basket shape to cubic shape, which is more square than before heat treatment for recovery performance. Its mechanical properties meet the requirements of technical conditions.

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

A heat treatment method for recovering performance of K465 alloy turbine blades belongs to the field of metallurgy. Keep warm for 40~45min, keep warm at 1190°C~1200°C for 2~2.5h, keep warm at 1230°C for 4~4.5h; Cool to 1000°C, cool with inert gas partial pressure; fill inert gas at 1000°C and cool to 300°C, open the furnace door to cool below 300°C. The invention has a very obvious effect on the recovery performance (creep) of the K465 alloy turbine blade after one service life, and the intragranular gamma prime shape recovers from a polygon or flower basket shape to a cubic shape, which is more square.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a heat treatment method for K465 alloy turbine blades to restore performance. Background technique [0002] K465 alloy has high thermal strength, good oxidation resistance and corrosion resistance, and is widely used in the manufacture of aero-engine turbine blades, and the blades can be used for a long time below 1000 ° C, taking a leading position in the world. The alloy is a precipitation-strengthened casting superalloy, and its intragranular γ′ strengthening phase content is about 63% (volume percentage). The service life of the blade is determined by the morphology of the intragranular γ′ strengthening phase. After the blade has been in service for a life span (500h~600h), the morphology of the γ′ phase changes from the original square shape to polygonal or flower basket shape. So far, there is no precedent for K465 alloy turbine blade performance recovery in...

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): C22F1/10C21D9/00
Inventor 彭志江张明俊邹建波韩欢乐献刚
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com