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Molten salt corrosion resistant nickel-based superalloy with excellent performance

A nickel-based superalloy and molten salt corrosion technology, applied in the field of nickel-based superalloys, can solve the problems of low fluoride corrosion resistance and high durability of alloys, and achieve excellent room temperature plasticity, high temperature microstructure stability, good anti-melting Effects of Salt Corrosion Properties

Active Publication Date: 2014-08-06
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • 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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  • Molten salt corrosion resistant nickel-based superalloy with excellent performance
  • Molten salt corrosion resistant nickel-based superalloy with excellent performance
  • Molten salt corrosion resistant nickel-based superalloy with excellent performance

Examples

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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

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

Belonging to the technical field of metal materials, the invention discloses a molten salt corrosion resistant nickel-based superalloy with excellent performance. In terms of weight percentage, the alloy comprises: less than or equal to 0.08% of C (preferably in the range of 0.03-0.06%), 0.5-5% of Fe, 6.0-8.0% of Cr, 12-18% of Mo, less than or equal to 2% of Ta, less than or equal to 2% of Ti, less than or equal to 2% of Nb, and the balance Ni, wherein the sum of Ti, Nb and Ta is greater than or equal to 1% and less than or equal to 2%. In addition to excellent room temperature plasticity, high temperature structure stability and high mechanical properties under high temperature, the alloy also has good resistance to molten salt corrosion, and can meet the use demands of molten salts and irradiation environments with high use temperature and performance requirements. Thus, the molten salt corrosion resistant nickel-based superalloy is suitable for high-temperature structural materials of 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 Applications(China)
IPC IPC(8): C22C19/05
Inventor 董加胜张健楼琅洪刘涛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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