摘要
研究了纯铁、碳钢及低合金钢的渗硼层与基休之间形成的过渡区的组织和性能。低、中碳钢渗硼层过渡区的晶粒异常粗大，而纯铁及高碳钢的渗硼层过渡区组织无异常粗大现象。中碳钢的过渡区在紧靠硼化物层的窄小区域内有富碳现象，但整个过渡区并不富碳。渗硼过渡区的异常粗大组织主要是由于过渡区中的硼与ＡｌＮ作用后形成ＢＮ，使ＡｌＮ的阻碍奥氏体晶粒长大作用减弱而造成的。高碳钢渗硼层前沿的羽毛状组织中包含有 Ｆｅｓ（Ｃ．Ｂ）及 ＦｅＢ这两个相。
In this paper the morphology and properties cf the transition zone between the,boride zone and the matrix of pure iron, carbon steel, low alloy steel are studied. The grain size in the transition zone of low and mcdium-carbon steel is abnermally large, whereas the grain size in the transition zone of pure iron and high-carbon steel is normal., In the narrow zone of the transition layer which is very near to the Fe,B zone there is enrichment of carbon; but on the average there is no enrichment of carbon in the whole transition zone. The abnormal large grain in the transition zone is principally due to the fact that the boron atoms in the transition zone interact with AlN to form BN which makes the resisting effect of AlN to the growing of austnite grain reduced. In the front of the boride zone of high-carbon steel the feathered and block phase are Fe2B and Fe, (C.B) phase.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
1991年第6期657-662,共6页
Journal of Dalian University of Technology
关键词
渗硼
过渡区
异常组织
富碳
boriding
intermediate zone/enrichment of carbon
abnormal strucfare
feather structure
