【作者】 周海； 陈飞； 姚斌； 吕俊霞； 杨英歌； 胡鹏杰； 龚伟；

【Author】 ZHOU Hai, CHEN Fei, YAO Bin, LU Jun-xia, YANG Ying-ge, HU Peng-jie, GONG Wei (Beijing Institute of Petrol-chemical Technology, Beijing 102617, China)

【机构】 北京石油化工学院机械工程系；

【摘要】 采用低温气体多元共渗技术在铸钢表面进行气体多元共渗。研究了不同温度及时间对渗层显微组织、显微硬度及渗层厚度的影响,并探讨了渗入机理。结果表明:采用低温气体多元共渗技术,在铸钢表面可以形成以碳化物和氮化物为主的合金渗层;选用合适的处理温度和时间,可以得到最佳的表面硬度;表面吸附和热扩散是形成扩散层的主要条件。更多还原

【Abstract】 The cast steel was penetrated with C-N-O multi-elements by low temperature gas multi-elements penetration technique in this paper. The effect of temperature and time on microstructure, microhardness and thickness of penetrating layer were investigated. And the diffusion mechanism was also studied. The experimental results show that the alloy penetration layer consisting of carbide and nitride is formed on cast steel surface. The thickness of penetrating layer is between 20μm and 30μm. The optimal surface microhardness is obtained with an appropriate penetrating temperature and time. Surface absorption and high temperature diffusion are the major factors of forming alloying layer.更多还原