Liu Yawei, Liqiang Gong, Dong Minqi, Zhengyang Chen, Tounan Jin, Wenhang Yin, Hanguang Fu
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引用次数: 0
Abstract
This article investigates the effect of N content on the microstructure, mechanical properties and wear resistance of hypereutectic high chromium cast iron (HHCCI). With the increase of N content, the primary carbides are obviously refined, the austenite content increases, and the dispersed granular Cr2N precipitates. After quenching at 1000 °C, secondary carbides are precipitated from the matrix, the matrix transforms into martensite + retained austenite. With the increase of N content, the corrosion resistance of HHCCI increases, and 0.3 wt.% N HHCCI shows the best corrosion resistance. With the increase of N content, the wear resistance of HHCCI increases. The wear resistance of HHCCI with 0.15 wt.% N is the best, which is 1.57 times that of HHCCI without N.
本文研究了氮含量对超共晶高铬铸铁（HHCCI）的显微组织、力学性能和耐磨性的影响。随着 N 含量的增加，一次碳化物明显细化，奥氏体含量增加，并析出分散的粒状 Cr2N。1000 °C 淬火后，二次碳化物从基体中析出，基体转变为马氏体+残余奥氏体。随着 N 含量的增加，HHCCI 的耐腐蚀性增强，0.3 wt.% N HHCCI 的耐腐蚀性最好。随着 N 含量的增加，HHCCI 的耐磨性也随之增加。含 0.15 wt.% N 的 HHCCI 的耐磨性最好，是不含 N 的 HHCCI 的 1.57 倍。
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《Materials Science and Technology》（MST） is an international forum for the publication of refereed contributions covering fundamental and technological aspects of materials science and engineering.
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