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本文对含铝的高速钢经不同的氮化工艺处理后,通过显微硬度测定表面层硬度的变化,利用透射电镜对表层组织的观察,电子衍射鉴定表层相结构,扫描电镜作表层微区元素分布,电子探针作表层O、N、C等元素分布的测定,结果发现含铝的高速钢经O—N处理后,表层由于氧化脱炭形成以A1_2O_3和Fe_2O_3为主的氧化层,明显影响了氮化效果,但在无氧化气氛中进行氮化,如离子氮化,含铝的高速钢能产生氮化效果。
In this paper, the aluminum-containing high-speed steel after different nitriding process, by measuring the hardness of the surface hardness changes, the use of transmission electron microscopy of surface tissue observation, electron diffraction identification of surface phase structure, scanning electron microscopy for surface micro-elements Distribution and electron probe were used to determine the distribution of O, N, C and other elements. The results showed that the surface of Al-containing high speed steel was oxidized and deoxidized to form the oxide layer mainly composed of A1_2O_3 and Fe_2O_3, which obviously affected The nitriding effect, but in an oxidizing atmosphere for nitriding, such as ion nitriding, aluminum-containing high-speed steel can produce nitriding effect.