摘要
以304不锈钢为基材,利用自制固体渗剂在不锈钢表面成功制备了硼化层,厚度可达50μm,结合强度为33.5MPa。利用X射线衍射仪和透射电镜对硼化层的相结构和微观组织结构进行分析,并利用电子探针对硼化层的截面形貌进行分析。结果表明,硼化层主要有FeB和Fe2B相组成,Fe2B晶粒细小,晶界平直;夹在Fe2B晶粒之间的齿间组织粗糙不平,是基体合金元素和B元素结合生成的硼化物,这些硼化物紧密的附着在Fe2B晶粒上。这些组织有利于提高硼化层与基体的结合强度。
Boride layer was successfully prepared on the surface of 304 stainless steel using special solid boronizing agent. The thickness of the boride layer can be up to 50μm. The phase structure and microstructure of the boride layer are analyzed with X-ray diffraction (XRD), transmission electron microscope (TEM) and electron probe microanalysis (EPMA). The results show that the boride layer consists mainly of FeB and Fe2B phases. Fe2B grains are fine and the grain boundaries are smooth. Alloy elements are combined with substrate to form dentate boride. It is found that the dentate structure is composed of B and other alloy elements and located between Fe2B grain and adhere to the Fe2B grains. These structures are beneficial to enhance the bond strength of the boride layer and the substrate.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2006年第3期91-94,共4页
Transactions of Materials and Heat Treatment
基金
国家863计划资助项目(2003AA305950)
关键词
不锈钢
硼化层
微观组织
结合强度
Bond strength (materials)
Borides
Microstructure
Surfaces
X ray diffraction analysis
