A Nickel-Based Superalloy With Excellent Performance Against Molten Salt Corrosion

A nickel-based superalloy and molten salt corrosion technology, which is applied in the field of nickel-based superalloys, can solve the problems of high durability and low performance of fluoride corrosion-resistant alloys, and achieve high temperature structure stability, excellent room temperature plasticity, and good corrosion resistance. Effect of Molten Salt Corrosion Properties

Active Publication Date: 2017-07-07
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

[0003] For this reason, the present invention aims at the problem of low performance of fluoride-resistant alloys, and develops high-performance nickel-based alloys with high-performance resistance to fluoride molten salt corrosion, which is slightly higher than that of foreign alloys, but whose durability is higher than that of Hastelloy N. base superalloy

Method used

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  • A Nickel-Based Superalloy With Excellent Performance Against Molten Salt Corrosion
  • A Nickel-Based Superalloy With Excellent Performance Against Molten Salt Corrosion
  • A Nickel-Based Superalloy With Excellent Performance Against Molten Salt Corrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The composition of the alloy (No.1 alloy) in this example is shown in Table 2. After vacuum induction melting (melting 20 kg ingot shape), the composition alloy is cast into an ingot, and then forged into bar. The forged bar is heat treated, and the heat treated test bar is processed into a performance test sample and a corrosion test sample, and then the durability test and the corrosion test are carried out. The test results are shown in Table 3 and Table 4.

[0028] Table 2 Example 1-11 alloy composition, wt%

[0029] alloy Cr Fe Mo Ti Ta Nb C Si mn Ni No.1 6.2 3.8 12.5 1.2 0.3 0 0.032 0.48 0.67 Remain No.2 7.0 4.3 14.2 1.8 0.1 0.1 0.042 0.48 0.67 Remain No.3 7.9 4.8 14.2 1.0 0.5 0.5 0.048 0.49 0.71 Remain No.4 7.0 4.3 14.2 0.5 1.3 0.15 0.042 0.48 0.67 Remain No.5 7.9 4.8 15.2 0.5 0.8 0.7 0.058 0.68 0.77 Remain No.6 7.0 4.1 16.2 0.1 1.9 0 0.058 0.6...

Embodiment 2

[0031] The composition of the alloy (No.2 alloy) in this example is shown in Table 2. After vacuum induction melting (melting 20 kg ingot shape), the composition alloy is cast into an ingot, and then forged into bar. The forged bar is heat treated, and the heat treated test bar is processed into a performance test sample and a corrosion test sample, and then the durability test and the corrosion test are carried out. The test results are shown in Table 3 and Table 4.

Embodiment 3

[0033] The composition of the alloy (No.3 alloy) in this example is shown in Table 2. After vacuum induction melting (melting 20 kg ingot shape), the composition alloy is cast into an ingot, and then forged into bar. The forged bar is heat treated, and the heat treated test bar is processed into a performance test sample and a corrosion test sample, and then the durability test and the corrosion test are carried out. The test results are shown in Table 3 and Table 4.

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Abstract

The invention discloses a nickel-based high-temperature alloy resistant to molten salt corrosion with excellent performance, and belongs to the technical field of metal materials. In terms of weight percentage, the composition of the alloy is: C≤0.08% (the preferred range is 0.03-0.06%), Fe0.5-5%, Cr6.0-8.0%, Mo12-18%, Ta≤2.0%, Ti≤2.0 %, Nb≤2.0%, Ni balance; where: 1%≤Ti+Nb+Ta≤2%. The alloy not only has excellent room temperature plasticity, high temperature structure stability and high high temperature mechanical properties, but also has good corrosion resistance in molten salts, which can meet the needs of molten salts and irradiation environments with high service temperature and performance requirements. . High temperature structural materials for molten salt nuclear reactors.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a nickel-based high-temperature alloy with excellent performance and resistance to molten salt corrosion. Background technique [0002] The fourth-generation nuclear reactors that use molten salt as a cooling medium all have serious problems of fluoride molten salt corrosion. Therefore, unlike other types of reactors, the alloy needs to have good resistance to fluoride molten salt corrosion while ensuring high temperature and high strength. performance. In the research and development of fluoride molten salt corrosion resistant superalloys, my country is still in its infancy. The foreign alloys currently resistant to molten salt corrosion are mainly Hastelloy N alloys. Compared with foreign fluoride molten salt corrosion resistant alloys, there are still some difference. [0003] For this reason, the present invention aims at the problem of low performance of fluoride-re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05
Inventor 董加胜张健楼琅洪刘涛李志军王尧申健卢玉章谢光张功姜卫国王雁王栋郑伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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