Long-service-life high-strength hot-corrosion-resistant nickel-based superalloy and application thereof

A nickel-based superalloy, long-life technology, applied in the field of metal materials, can solve the problems of late development of heavy-duty gas turbines, lack of superalloy materials, etc., and achieve the effect of improving the stability of long-life tissue

Inactive Publication Date: 2021-03-30
CENT OF EXCELLENCE FOR ADVANCED MATERIALS +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The development of thermal corrosion-resistant nickel-based superalloys in foreign countries is relatively complete, but the development of heavy-duty gas turbines in my country started relatively late, and superalloy materials suitable for F, G / H class heavy-duty gas turbine turbine guide blades are still relatively lacking

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
  • Long-service-life high-strength hot-corrosion-resistant nickel-based superalloy and application thereof
  • Long-service-life high-strength hot-corrosion-resistant nickel-based superalloy and application thereof
  • Long-service-life high-strength hot-corrosion-resistant nickel-based superalloy and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A long-life, high-strength, heat-resistant and corrosion-resistant nickel-based superalloy, comprising the following components by weight percentage:

[0039] Cr 18.5%; Co 18.5%; Al 1.9%; Ti 3.8%; Ta 0%; W 4.9%; Mo 1.0%; Nb 1.2%; C 0.1%; B 0.002%; Zr 0.017%;

[0040] The above-mentioned alloy is used to prepare a test bar, and the ingredients are mixed according to the ingredients in the alloy, and then melted in a vacuum induction furnace. At a temperature of 1550 ° C ~ 1580 ° C, refining for 5 min ~ 10 min, and then at a temperature of 1410 ± 20 ° C Casting under conditions, the temperature range of the shell temperature is 850±50°C, after pouring, a cast nickel-based superalloy test rod is obtained. Among them, the heat treatment parameters of the superalloy test rod are: 1160±10°C / 4h, 850±20°C / 16h. The N of the superalloy test bar v The value is 2.39.

Embodiment 2

[0042] Different from Example 1, the long-life, high-strength, hot-corrosion-resistant nickel-based superalloy of Example 2 includes the following components by weight percentage:

[0043] Cr 18.5%; Co 18.9%; Al 1.9%; Ti 3.8%; Ta 0.1%; W 4.9%; Mo 1.0%; Nb 1.2%; C 0.1%; B 0.015%; Zr 0.017%;

[0044] Its preparation method is the same as that of Example 1 and will not be repeated here.

[0045] The N of the obtained superalloy test bar v The value is 2.38.

[0046] The microstructure of the superalloy test bar is as follows: Figure 1 to Figure 3 As shown, among them, figure 1 is the as-cast structure diagram, figure 2 20μm microstructure of heat treatment state, image 3 The heat-treated microstructure of 2μm. From figure 1 It can be seen that there is no γ / γ′ phase eutectic structure in the as-cast alloy, from figure 2 It can be seen that after heat treatment, there is no η phase precipitation, from image 3 It can be seen that the γ′ phase structure is spherical, wit...

Embodiment 3

[0048] Different from Example 1, the long-life, high-strength, hot-corrosion-resistant nickel-based superalloy of Example 3 includes the following components by weight percentage:

[0049] Cr 19.0%; Co 19.0%; Al 2.0%; Ti 3.9%; Ta 0.1%; W 4.5%; Mo 1.0%; Nb 1.3%; C 0.1%; B 0.015%; Zr 0.017%;

[0050] Its preparation method is the same as that of Example 1 and will not be repeated here.

[0051] The N of the obtained superalloy test bar v The value is 2.46.

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 long-service-life high-strength hot-corrosion-resistant nickel-based superalloy. The nickel-based superalloy comprises the following components in percentage by weight of 18.0%-19.9% of Cr, 18.0% to 25.0% of Co, 1.6%-2.8% of Al, 3.1%-4.5% of Ti, 0.1%-0.5% of Ta, 3.1%-4.9% of W, 0%-1.20% of Mo, 0.7%-1.7% of Nb, 0.005% to 0.15% of C, 0.003%-0.03% of B, 0.005% to 0.08% of Zr, and the balance Ni. Through component design optimization of the alloy, the thermal corrosion resistance and the high-temperature strength of the alloy are guaranteed, and meanwhile the long-life structure stability of the alloy is improved. The alloy disclosed by the invention is suitable for manufacturing hot-end parts of gas turbines and can be used for thousands of hours for a long time in agas corrosion environment.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a long-life, high-strength heat-resistant and corrosion-resistant nickel-based superalloy suitable for preparing heat-corrosion-resistant gas turbine hot-end parts and its application. Background technique [0002] Compared with aero-engines, gas turbines not only require superalloys to have good high-temperature strength such as creep and fatigue, but also have unique requirements. The specific unique requirements are as follows: (1) Because the fuel used in gas turbines is extremely easy to cause heat loss of materials Corrosion damage, so it needs to have excellent thermal corrosion resistance; (2) Since the life of the gas turbine is tens of thousands or even hundreds of thousands of hours, it needs to have good long-term tissue stability; (3) Due to the large size of the gas turbine blade, And the structure of the inner cavity is complex, so it needs good casting pro...

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): C22C19/05C22C1/02C22F1/10C22C30/00C22F1/00
CPCC22C19/056C22C1/023C22F1/10C22C30/00C22C1/02C22F1/00
Inventor 李相伟温冬辉王瑶郭秋娟郑江鹏丁仁根初铭强张书彦张鹏
Owner CENT OF EXCELLENCE FOR ADVANCED MATERIALS
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