45Ni-35Cr-Nb合金中M23C6析出的研究

IF 1.1 Q3 METALLURGY & METALLURGICAL ENGINEERING

Acta Metallurgica Slovaca Pub Date : 2019-09-25 DOI:10.12776/ams.v25i3.1312

Matías Sosa, Alejandro Sepulveda Buitrago, A. Picasso

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引用次数: 0

摘要

采用光学显微镜研究了以离心铸管形式生产的45Ni-35Cr-Nb合金(俗称ET45微合金)在1073和1173 K下经过不同时间时效处理后的形貌。描述了M23C6次生碳化物析出现象随时间的变化规律。采用JMAK (Johnson-Mehl-Avrami-Kolmogorov)模型分析表明，二次碳化物的析出是单阶段的。结果表明，在扩散的辅助下，该现象的活化能为196 kJ/mol。

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STUDY OF M23C6 PRECIPITATION IN A 45Ni-35Cr-Nb ALLOY

The 45Ni-35Cr-Nb alloy, commonly known as ET45 micro, produced in the form of centrifugally cast tubes, was studied by means of optical microscopy after aging treatments at 1073 and 1173 K for different times. A description of M23C6 secondary carbides precipitation phenomenon was made as a function of time. The analysis after using the Johnson–Mehl–Avrami–Kolmogorov (JMAK) model showed that the secondary carbide precipitation occurs in a single stage. It was found that this phenomenon, which is assisted by diffusion, has an activation energy of 196 kJ/mol.

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来源期刊

Acta Metallurgica Slovaca METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

2.00

自引率

30.00%

发文量

审稿时长

12 weeks