• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 1991, Vol. 27 ›› Issue (3): 74-78.

• 论文 • 上一篇    下一篇

40Cr钢氮离子注入层的显微组织分析

金祖卿;朱中生;陈元儒;蔡光军   

  1. 天津大学机电分校;厦门轴承厂;西南交通大学
  • 发布日期:1991-05-01

ANALYSES OF THE MICROSTRUCTURE OF N+ IMPLANTED LAYER ON 40Cr STEEL

Jin Zuqing;Zhu Zhongsheng;Chen Yuanru;Cai Guangjun   

  1. The Mechanial & Electrical College under Tianjin University Xiaman Bearing Factory Southwest Jiaotong University
  • Published:1991-05-01

摘要： 本文用透射电镜分析研究了40Cr钢经氮离子注入后沿注入层不同深度的显微组织结构的变化。研究发现，注入层中的α-Fe晶粒细化，原Fe 3C相解体，同时形成了弥散分布的α″、γ′、ε等氮化物相。在注入层与基体的过渡层中仍基本上保持原组织状态。对生产上述现象的可能的机制进行了讨论。

关键词: 铬钢, 离子注入, 显微组织

Abstract: TEM has been used to investigate the microstructures of the surface layer formed on 40Cr steel by nitrogen ion implantation. Different microstructures at various depths have been observed. In the outermost layer and subjacent layer, the ferrite grains have been refined, the nitrides α″-Fe16N20 γ′-Fe4N, ε-Fe3,3 (C. N) have precipitated and carbides Fe3C disappeared, while in the transition layer adjacent to matrix, the microstructure consists of a dispersion of tiny Fe10N2 precipices in the perfect ferrite matrix. The process of ferrite grains subdivided into ultra-fine grains and disappearance of retained carbides, formation of disperse nitrides were discussed qualitatively.

Key words: 铬钢, 离子注入, 显微组织

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