Cubic boron nitride(c BN), hexagonal boron nitride (h BN), B 2O 3, FeB and Fe 2B were found in the hardened layers by X ray photoelectron spectroscopy(XPS) and X ray diffraction (XRD).

• 经X射线电子能谱 (XPS)和X射线衍射分析 (XRD) ,发现硬化层中的组织有立方氮化硼 (c BN)、六方氮化硼 (h BN)、B2 O3,FeB和Fe2 B。