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首页> 外文期刊>Journal of Materials Engineering and Performance >Magnetic Hysteresis Loop as a Tool for the Evaluation of Spheroidization of Cementites in Pearlitic Steels
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Magnetic Hysteresis Loop as a Tool for the Evaluation of Spheroidization of Cementites in Pearlitic Steels

机译：磁滞回线作为评估珠光体钢中渗碳体球化的工具

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摘要

Pearlitic Fe-0.76wt.% C binary alloy was isothermally annealed at 700 A degrees C up to 100 h to study the spheroidization of cementites and its effect on both the mechanical and magnetic properties with the aim to use the magnetic techniques for the evaluation of spheroidization in steels. Micro-Vickers hardness, magnetic hysteresis loop (MHL) measurements, optical and scanning electron microscopy studies were carried out at various lengths of time by interrupting the test. Microhardness and coercivity were decreased with increase in annealing time due to reduction in dislocation pinning and magnetic domain wall pinning for the breaking of cementite lamella and their subsequent transformation to spheroidal form. The microhardness and coercivity showed a very good correlation with the change in microstructure indicating that MHL would be a suitable non-destructive evaluation tool for the evaluation of spheroidized pearlitic steels.
机译：将珠光体Fe-0.76wt。％C二元合金在700 A的温度下等温退火长达100 h，以研究渗碳体的球化作用及其对力学性能和磁性能的影响，目的是利用磁性技术来评估渗碳体。钢中的球化。通过中断测试，在不同的时间长度进行了微维氏硬度，磁滞回线（MHL）测量，光学和扫描电子显微镜研究。显微硬度和矫顽力随着退火时间的增加而降低，这是由于减少了渗碳体薄片破裂的位错钉扎和磁畴壁钉扎以及随后转变成球状形式。显微硬度和矫顽力与显微组织的变化具有很好的相关性，表明MHL将是评估球化珠光体钢的合适无损评估工具。

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