手机知网 App
24小时专家级知识服务
打 开
金属学及金属工艺
Effects of Si on the stability of retained austenite and temper embrittlement of ultrahigh strength steels
 
Effects of silicon (Si) content on the stability of retained austenite and temper embrittlement of ultrahigh strength steels were investigated using X-ray diffraction (XRD),transmission electron microscopy (TEM),and other experimental methods.The results show that Si can suppress temper embrittlement,improve temper resistance,and hinder the decomposition of retained austenite.Reversed austenite appears gradually with the increase of Si content during tempering.Si has a significant effect on enhancing carbon (C) partitioning and improving the stability of retained austenite.Si and C atoms are mutually exclusive in lath bainite,while they attract each other in austenite.ε-carbides are found in 1.8wt% Si steel tempered at 250℃,and they get coarsened obviously when tempered at 400℃,leading to temper embrittlement.Not ε-carbides but acicular or lath carbides lead to temper embrittlement in 0.4wt% Si steel,which can be inferred as cementites and composite compounds.Temper embrittlement is closely related to the decomposition of retained austenite and the formation of reversed austenite.
14 59
手机阅读本文
下载APP 手机查看本文
International Journal of Minerals Metallurgy and Materials
2011年05期
相似文献
图书推荐
相关工具书

搜 索