论文部分内容阅读
对氮化表面沉积物进行x射线物相鉴定,发现沉积物为a-Fe、Fe_2N、Fe_4N、FeC以及Fe_3O_4,说明氮化时FeN→Fe_2N→Fe_3N→Fe_4N的分解反应是正确的。碳钢氮化层电子探针分析表明,氮浓度极大值位于扩散层与基体组织之间,而碳浓度较基体组织高,可能存在碳由基体组织向氮化层反向扩散的问题。用电子显微镜观察轰击表面,得到与金相显微镜观察相一致的结论。用x射线测定了离子轰击点阵静畸变,发现离子轰击和高温回火(520℃)产生ε→ε+r’的转变。
The X-ray phase identification of the surface nitrides showed that the sediments were a-Fe, Fe_2N, Fe_4N, FeC and Fe_3O_4, indicating that the decomposition reaction of FeN → Fe_2N → Fe_3N → Fe_4N was correct. Electron probe analysis of the nitrided layer of carbon steel shows that the maximum nitrogen concentration is located between the diffusion layer and the matrix structure and the carbon concentration is higher than that of the matrix structure. There may be a problem that carbon diffuses backwards from the matrix structure to the nitride layer. The surface of the bombardment was observed with an electron microscope, and the conclusion consistent with the observation of the metallographic microscope was obtained. X-ray was used to measure the static distortion of ion bombardment lattice. It was found that ion bombardment and tempering (520 ℃) produced ε → ε + r ’transformation.