离子氮化40Cr与TiN和TiAlN复合处理的组织与性能  

Microstructure and Performance of TiN Coating and TiAlN Coating Deposited on Ion-nitrating 40Cr

作　　者：李晖[1] 孙迎军[1] 陈亚茹[1] 刘威[1] 

机构地区：[1]重庆理工大学材料学院,重庆400054

出　　处：《热加工工艺》2016年第10期197-201,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(51275548);重庆市重点自然科学基金资助项目(cstc2012JJB70002)

摘　　要：对40Cr分别进行TiN和TiAlN涂层复合处理,对比研究了二者的组织与性能。结果表明,两种致密、均匀的涂层沉积在离子氮化表面能够降低表面粗糙度。TiN涂层的物相主要是TiN与Ti_2N,表面硬度达到2700 HV0.2,结合力15 N;Ti lN涂层则主要由Fe_4N、(Ti,Al)N和TiN等相组成,表面硬度达到3000 HV0.2,结合力为17 N;氮化与涂层的复合处理相比于氮化处理能够获得更高的硬度。TiN涂层硬度较低、脆性较大,在相同的加载条件下,磨损更为严重,磨痕边缘涂层变形与剥落更加明显;TiAlN涂层磨痕宽度均匀,磨损量低,耐磨性最高。Microstructure and performance characteristics of ion-nitriding 40Cr deposited by TiN and TiAlN coating were studied.The results show that both coatings deposited on the ion-nitfiding surface are uniform and dense,which can reduce the surface roughness effectively. The main phase compositions of TiN coating are TiN and Ti2N, the surface hardness reaches 2700 HV0.2 and the adhesive force between the coating layer and matrix is about 15 N. In contrast, the main phase compositions of TiAIN coating are Fe4N, （Ti, Al） N and TiN, which achieves higher hardness of 3000 HV0.2, and the adhesive force is about 17 N. The deposition of hard coatings onto nitrided surface can improve the surface hardness which is higher than that of ion-niWiding surface, the results of fi＇iction wear tests under the same loading conditions reveal that wear loss of TiA1N coating with uniform is less that of TiN coating with lower hardness and more brittleness, and deformation and spalling on the wear zones of the TiN coating are more serious than those of TiAlN,which demonstrates the wear resistance of TiA1N is more excellent.

关 键 词：40Cr TIN TIALN 复合处理 性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]