稀土元素对碳氮共渗组织和性能的影响-《郑州大学学报(工学版)》

文章信息/Info

Title:: The effects of rare earth elements on carbon nitrogen co -seepage tissue and performance

Author(s):: Zhu Shijie; Yang Kaijun; Guo Xiyun; Lou Nanjin; Department of Materials Science and Engineering, Zhengzhou University of Technology

摘要:: 本文研究了稀土对气体碳氮共渗动力学过程、渗层成分和组织结构、渗层性能的响。通过优化选择了合适的稀土种类，加入量和工艺参数。结果表明，稀土具有明显的催渗作用，与不加稀土相比，可使渗速提高３０％；表层中碳、氮含量增加，碳化物的数量增加、颗粒变得细小、弥散且向内延伸分布。马氏体和残余奥氏体细化；渗层硬度提高，显微硬度分布趋于合理；在高负荷下渗层的耐磨性提高约３０％，经该技术处理的饲料压模的寿命大幅度提高。电子能谱分析和物相分析表明，稀土元素渗入渗层并形成稀土化合物相，起到微合金化作用。

Abstract:: This article studies the sound of rare earth, osmotic composition and tissue structure, and seepage layer performance of rare earth. By optimizing the appropriate types of rare earth, add quantity and process parameters. The results show that rare earth has obvious seepage effects, which can increase the seepage rate by 30 % compared with without rare earth; increased carbon and nitrogen content in the surface layer, increased the number of carbides, the particles became small, diffused, and extended inward distribution. Matriots and residuals are refined; the hardness of the peak layer is increased, and the microscopic hardness distribution becomes reasonable; the abrasion resistance of the penetration layer under high load is increased by about 30 %, and the life of the feed pressure of this technology has increased significantly. Electronic energy spectrum analysis and phase analysis show that rare earth elements infiltrate into the infiltration layer and form a rare earth compound phase, which plays a role in micro -alloy.