高温滑动磨损过程中氧化物磨屑的演变机制研究

在65Mn钢分别与3Cr2W8V钢和真空熔结铁基合金涂层（成分是4.5%C-46%C-1.0%Si-2.0%B-6.3%Ni-Fe余量）组成的高温滑动磨损系统中，研究了氧化物磨屑的演变机制，证明磨损过程中磨屑不仅存在氧化，碎化等机械，化学过程，还存在因相互挤压而粘结甚至微区热压烧结等冶金过程，两方面的共同作用，使氧化物磨屑成分均匀化。应用Fe-O系统相图和Fe3O4-Cr2O3系统相图，分析两磨损系统磨屑形态差别的原因。

The Research of Evolving Mechanism of Wear Debris in High Temperature Sliding Wear Systmes

The evolving mechanism of wear debris was studied in two high temperature sliding wear systems composed of 65Mn steel with 3Cr2W8V steel and 65Mn steel with iron-base alloy coating (4.5%C - 46%Cr - 1.0%Si - 2.0%B - 6.3%Ni - Fe bal.) respectively. The results proved that during wear process, the wear debris can be not only oxidized and broken, but also experienced some metallurgical processes like hot press sintering at small areas due to hot extruding. Because of the two side effects, the composition of debris can become homogeneous. The reason of different debris morphology for two wear systems was analyzed using Fe-O system and Fe3O4-Cr2O3 system phase diagrams.