Measurement of phase transformation in steels using electromagnetic sensors
Measurement of phase transformation in steels using electromagnetic sensors
复制标题
使用电磁传感器测量钢的相变
DOI：
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复制
发表时间：
2002
期刊：
影响因子：
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通讯作者：
A. Peyton
中科院分区：
文献类型：
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作者：
C. Davis;M. Papaelias;M. Strangwood;A. Peyton
An electromagnetic (EM) sensor, capable of detecting the formation of ferromagnetic ferrite from paramagnetic austenite below the Curie temperature, has been developed and assessed. The long term aim of this work is to develop a method for monitoring microstructure online during strip steel processing. In the present paper, the initial results of variation in trans-impedance with microstructure obtained for three different types of steel with varying carbon contents are discussed. It was found that the EM sensor can successfully detect the formation of ferrite below the Curie temperature, but trans-impedance values are affected by the presence of a decarburised ferrite ring that forms around the specimens tested in a furnace. It was also found that the trans-impedance value is monotonically (non-linearly) related to ferrite volume fraction, and depends on the morphology and distribution of the ferromagnetic phase and, hence, is influenced by the prior austenite grain size.
