摘要
采用复合催渗和调整工艺参数能较好地实现钢的固体深层渗硼 .分析结果表明 :渗硼层表层由Fe2 B和FeB双相组成 ,向内Fe2 B相增加 ,FeB相减少 ,渗层呈梳齿状 ,齿的前沿过渡区较宽 ,心部组织较粗大 ;表层存在疏松和孔洞 ,且随钢中含碳量增加和合金元素的含量增加 ,渗层深度下降 ,疏松和孔洞减少 ;疏松和孔洞使表层硬度低于次表层 ,其显微硬度分布有一峰值 。
In this paper,the pack deep case boriding can be realized by using compound energizer and adjusting processing parameters.The microstructure of boride layer is composed of dual phase (Fe 2B phase and FeB phase).The relative content of Fe 2B phase increases and that of FeB phase decreases in internal layer.The transitional zone becomes wider in front of boride needles.There are porosity and cavities in surface layer and the number of porosity and cavities decrease with the content of alloy elements increasing.The microhardness gradient is gentle
出处
《郑州工业大学学报》
CAS
2000年第3期54-56,共3页
Journal of Zhengzhou University of Technology
基金
河南省科技攻关项目! (971130 2 0 9)
关键词
深层渗硼
复合催渗
显微组织
钢
deep case boriding
compound energizing
microstructure
