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本文研究指出,离子渗氮可显著增加合金结构钢的耐磨性。无论是化合物层还是扩散层(当硬度在HM600以上时)都具有优异的耐磨性。特别对单相(r′)化合层的耐磨性,要比双相(ε+r′)的高。试验结果表明,在各个不同层深处,离子渗氮的耐磨性,均优于气体软氮化。并且发现,随着离子渗氮+淬火复合处理试样中的残留奥氏体量的降低,耐磨性则相应的提高。通过磨损表面、表层的显微镜和扫描电镜观察,作者对渗氯层的磨损机制作了讨论。此外,由薄膜透射电镜的观察,还初步提出了离子渗氮层耐磨性的本质。
This study indicates that ion nitriding can significantly increase the wear resistance of the alloy structural steel. Both the compound layer and the diffusion layer (when the hardness is above HM600) have excellent wear resistance. In particular, the abrasion resistance of single-phase (r ’) composite layers is higher than that of biphasic (ε + r’). The experimental results show that the wear resistance of ion nitriding is superior to the gas nitrocarburizing at all depths of different layers. It is also found that the wear resistance increases with the decrease of retained austenite in the samples treated by ion nitriding and quenching. Through the wear surface, the surface of the microscope and scanning electron microscopy, the author of the seepage chlorine layer wear mechanism are discussed. In addition, by the observation of thin-film transmission electron microscopy, the nature of wear resistance of ion nitriding layer is also proposed.