Effects of Pulsed Current and Pulsed Magnetic Field Complex Pretreatment on Martensite Transformation of Cr5 Steel during Continuous Cooling

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• 作者：Qing-chun LI^a ; ^{lqcsusan@126.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Li-juan LI^b ; Guo-wei CHANG^a ; Qi-jie ZHAI^b
• 关键词：pulsed current ; pulsed magnetic field ; pretreatment ; martensite transformation
• 刊名：Journal of Iron and Steel Research, International
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：22
• 期：12
• 页码：1131-1137
• 全文大小：5882 K

文摘

Carbide precipitation and martensite transformation in Cr5 steel have been observed in situ by high-temperature confocal laser-scanning microscopy. In this way, the influences of pulsed current and pulsed magnetic field complex pretreatment on carbide precipitation and martensite transformation during continuous cooling have been studied. The results show that the electropulsing complex pretreatment promotes the precipitation of M₇C₃-type carbides at high temperature, increases the start and finish temperatures of martensite transformation, and extends the phase transformation time. Martensite prefers to nucleate in the austenite with less precipitation of carbides due to the chemically homogeneous distribution of solute atoms.