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采用一种新型的等离子体浸没式离子注入技术 (PIII)在渗硼后的 5 0Mn钢试样上制备出了厚度为 0 .15～ 0 .2mm的立方氮化硼 (c BN)表面硬化层。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。在表层 60nm的深度范围内 ,c BN的含量较高。采用球盘式无润滑滑动摩擦实验和维氏显微硬度实验分别对渗硼 +PIII复合处理以及单独渗硼的 5 0Mn钢试样的性能进行了对比实验。结果表明 :与单独渗硼的试样相比 ,经渗硼 +PIII复合处理的试样具有高得多的硬度 (高达HV0 .1N44GPa)和耐磨性
A new type of plasma immersion ion implantation (PIII) was used to prepare cubic boron nitride (cBN) hardfacing layer with a thickness of 0.15 ~ 0.2mm on 50Mn steel samples after boronizing. . X-ray diffraction (XPS) and X-ray diffraction (XRD) analysis showed that the microstructure of the hardened layer was cubic boron nitride (c BN), hexagonal boron nitride (h BN), B2 O3, FeB and Fe2 B . The cBN content is high in the depth of 60 nm of the surface layer. The performance of the ball boring non-lubricated sliding friction test and the Vickers microhardness test were compared with the boronizing + PIII composite treatment and the single boron-infiltrated 50Mn steel respectively. The results show that the samples treated with boronizing + PIII treatment have much higher hardness (up to HV0.1N44GPa) and higher wear resistance than the boronized specimens alone