Antioxidant low-expansion high-temperature alloy

A high-temperature alloy, low-expansion technology, applied in the field of high-temperature alloys

Inactive Publication Date: 2012-06-06
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a new type of oxidation-resistant low-expansion superalloy material with low thermal expansion coefficient, no notch sensitivity, high room temperature strength, and stable long-term aging performance. To solve the problem that the previous alloys could not simultaneously have a low thermal expansion coefficient, good oxidation resistance, excellent durability and no notch sensitivity

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
  • Antioxidant low-expansion high-temperature alloy
  • Antioxidant low-expansion high-temperature alloy
  • Antioxidant low-expansion high-temperature alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] The present invention will be further explained below in conjunction with specific examples, but it does not limit the present invention.

[0041] The specific alloy composition is as follows:

[0042] Alloy No. Fe co Ni Nb Ti Si Cr Al Zr B Example 1 Bal. 26 27 3.8 1.0 0.1 2.8 1.5 0.05 0.028 Example 2 Bal. 29.4 24.5 4.8 0.85 0.27 2.0 1.75 0.11 0.018 Example 3 Bal. 29.4 24.5 4.8 0.85 0.27 3.4 0.8 0.02 0.013 Example 4 Bal. 29.4 24.5 4.8 0.85 0.27 2.2 2.00 0.15 0.022 Comparative example 1 Bal. 29.4 24.5 4.8 0.85 0.27 1.5 1.45 0.18 0.030 Comparative example 2 Bal. 29.4 24.5 4.8 0.85 0.27 3.0 2.1 - 0.004 Comparative example 3 Bal. 29.4 24.5 4.8 0.85 0.27 5.5 0.45 － 0.006

[0043] The specific preparation methods of the above alloys are that the alloy ingots are smelted by vacuum induction conventional melting process, after homogenizati...

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 antioxidant low-expansion high-temperature alloy, comprising 26-31 wt% of Co, 23-27 wt% of Ni, 3.8-5.8 wt% of Nb, 0.6-1.0 wt% of Ti, 0.1-0.5 wt% of Si, 2.0-3.4 wt% of Cr, 0.8-2.0 wt% of Al, 0.02-0.15 wt% of Zr, 0.013-0.028 wt% of B, and the balance of Fe. The high-temperature alloy guarantees the resistance to oxidation and high intensity, and simultaneously greatly reduces the thermal expansion coefficient of the alloy, increases long-term time efficiency organizational performance stability, and has the advantages of long service life and no notch sensitivity.

Description

technical field [0001] The invention relates to the field of high-temperature alloys, and in particular provides an oxidation-resistant low-expansion high-temperature alloy. Background technique [0002] Low-expansion superalloys are used to make thin-walled stator structural components, such as casings, outer rings, sealing rings, etc., which can simply and effectively control the gap between components and reduce the weight and cost of the engine. The development of aerospace and aerospace engines requires future low-expansion superalloys with lower expansion coefficient change rates, better oxidation resistance, and higher strength. Over the years, IN903, IN907, IN909, HRA929, HRA929C, EXP4005, IN783, Thermo-Span and other alloys have been developed. From the perspective of the development history of low-expansion superalloys, the general development trend is as follows: [0003] (1) Properly reduce the Ni / Co ratio, and further reduce the thermal expansion coefficient o...

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): C22C30/00
Inventor 孙文儒孙晓峰于连旭孙雅茹祁峰张伟红刘芳贾丹信昕郭守仁胡壮麒
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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