【摘要】 采用YG8电极和晶体管脉冲电源,在空气和氮气两种介质下对M2高速钢进行强化,并对所得涂层的物相组成和磨损机制进行了研究和探讨。结果发现,两种介质下的强化层第二主强化相明显不同,氮气下的涂层中ε-Fe2-3N相的含量较空气中的有明显提高,致使氮气下获得强化层的耐磨性呈现大幅提高;另外两种强化层磨损机制是以疲劳磨损为主,并伴随有磨粒磨损。但两者的疲劳磨损特征有很大区别,空气下强化层的疲劳磨损呈现较大的片状剥落现象,而氮气下的却呈现细小的块状剥落。更多还原

【Abstract】 YG8 electrode and transistor pulse power were used to strengthen M2 high-speed steel under ambient atmosphere and nitrogen gas respectively,and the phase composition and wear mechanism of the coatings were investigated.The results show that the second strengthening phase is markedly different for the two kinds of coatings.The content of ε-Fe2-3N phase are markedly higher in the coating prepared under nitrogen gas than that under ambient atmosphere,and the wear resistance is also enhanced obviously.The main wear mechanism of the two kinds of coatings is fatigue wear,and the next is abrasive wear.However,there are big differences in their fatigue wear characteristics,the phenomenon of larger flakes peeling off is found in the coating prepared under ambient atmosphere during fatigue wear process,while the small block peeling off is found in the coating prepared under nitrogen gas.更多还原