Relationship between Creep Strength and Magnetic Properties of Cobalt-bearing High Chromium Ferritic Steel

Shigeto YAMASAKI; Masatoshi MITSUHARA; Hideharu NAKASHIMA

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Relationship between Creep Strength and Magnetic Properties of Cobalt-bearing High Chromium Ferritic Steel

机译：携带钴高铬铁铁钢蠕变强度与磁性的关系

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In this study, the relationship between changes in the magnetic properties and creep strength with the addition of 3 or 6 mass% Co was investigated for ferritic steel containing 15 mass% Cr. Co addition up to 6 mass% hardly contributed to solid solution strengthening or precipitation strengthening at room temperature. However, in the range of 650 to 750°C, the steel with the larger amount of Co exhibited higher creep strength, which is explained by a reduction in the diffusion rate associated with a change in magnetic properties by Co addition. An increase of the volume magnetization of the steel with increasing Co content in the range from room temperature to about 800°C was confirmed. Comparing the difference in volume magnetization and the ratio of the creep strain rate for steels with different amounts of Co, a clear correlation was found. That is, at the temperature at which the difference in volume magnetization reached a maximum, the peak of the creep strain rate ratio was also observed. This result is explained as follows. In a low temperature region where the magnetization is large or in a high temperature region above the Curie point of both steels, the steels exhibit no significant difference in the creep strength. However, at a temperature where one steel loses its ferromagnetism but the other steel retains it, a significant difference in the creep strength is observed.

机译：在该研究中，研究了含有15质量％Cr的铁素体钢的加入3或6质量％CO的磁性和蠕变强度之间的关系。高达6质量％的Co难以在室温下加强固体溶液强化或沉淀。然而，在650至750℃的范围内，具有较大量的CO的钢表现出较高的蠕变强度，这通过Co加入的磁性变化相关的扩散速率的降低来解释。钢的体积磁化在室温至约800℃的范围内增加钢的体积磁化。比较体积磁化的差异和具有不同量CO的钢的蠕变应变速率的比率，发现了清晰的相关性。也就是说，在体积磁化差达到最大值的温度下，还观察到蠕变应变率比的峰值。该结果如下所述。在磁化强度大或在两个钢的居里点高于高温区域的低温区域中，钢在蠕变强度下没有显着差异。然而，在一个钢失去其铁磁性的温度下，但是另一钢保留它，观察到蠕变强度的显着差异。

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来源
《ISIJ international》 |2021年第1期|408-416|共9页
作者
Shigeto YAMASAKI; Masatoshi MITSUHARA; Hideharu NAKASHIMA;
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作者单位

Department of Engineering Sciences for Electronics and Materials Kyushu University 6-1 Kasuga-kouen Kasuga Fukuoka 816-8580 Japan;

Department of Engineering Sciences for Electronics and Materials Kyushu University 6-1 Kasuga-kouen Kasuga Fukuoka 816-8580 Japan;

Department of Engineering Sciences for Electronics and Materials Kyushu University 6-1 Kasuga-kouen Kasuga Fukuoka 816-8580 Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
ferritic steel; creep; cobalt; magnetic properties; Curie temperature; diffusion;

机译：铁素体钢;蠕动;钴;磁性;居里温度;扩散;

Relationship between Creep Strength and Magnetic Properties of Cobalt-bearing High Chromium Ferritic Steel

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