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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
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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

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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...

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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

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Application Information

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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
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