含Fe_2O_3摩擦层的促进形成对H13和45钢磨损性能的影响  

Formation of Tribo-Layer in the Presence of Fe_2O_3 Particles and Its Influence on Wear Performance of H13 and 45 Steel

作　　者：张秋阳 丁红燕 周广宏[1,2] 张临财 陈秋明[1,2] 秦珂 戴玉娇[1,2] 

机构地区：[1]淮阴工学院机械与材料工程学院,江苏淮安223003 [2]淮阴工学院江苏省介入医疗器械研究重点试验室,江苏淮安223003

出　　处：《摩擦学学报》2017年第6期823-830,共8页Tribology

基　　金：国家自然科学基金项目(51701079;51501067);江苏省自然科学基金项目(BK20140458);江苏省高等学校自然科学研究面上项目(17KJD430001)资助~~

摘　　要：Fe_2O_3是钢材高温或高速干滑动表面摩擦氧化物层的重要构成.本文作者通过在H13钢、45钢/GCr15钢的滑动界面添加Fe_2O_3纳米颗粒,试图促进保护性摩擦氧化物层的快速形成,避免了高温恶化材料的机械性能.研究了Fe_2O_3对H13钢和45钢磨损性能的影响,分析了摩擦氧化物层的形成机理,并探讨了基体硬度对摩擦氧化物层的作用.研究结果表明:无添加时,低硬度45钢的耐磨性明显差于高硬度的H13钢;GCr15钢在与45钢对摩时,磨损率也明显大于与H13钢对摩时.添加Fe_2O_3后,纳米颗粒在H13和GCr15钢表面迅速相互黏着并形成保护性的摩擦氧化物层,导致磨损率急剧下降,且随载荷增加仅轻微波动.而较软45钢基体对摩擦氧化物层的支撑能力较弱,摩擦氧化物层破碎,高载下磨损率明显大于低载下.Fe_2O_3 is an important component in tribo-oxide layers of steels in sliding at a high temperature or a high speed.In this paper,Fe_2O_3 nanoparticles were added onto the sliding interface of H13 steel/GCr15 steel and 45steel/GCr15 steel contacts to promote the rapid formation of tribo-oxide layer and avoid the deterioration of mechanical properties of materials due to high temperature.The effect of Fe_2O_3 particles at tribo-interface on wear performance of H13 and 45 steel was investigated,the forming mechanism of tribo-oxide layer was analyzed and the role of substrate hardness was also investigated.The results show that the wear resistance of 45 steel was significantly lower than that of H13 steel with no Fe_2O_3 particles.The wear rate of GCr15 steel against H13 steel was higher than that of GCr15 against45 steel.Coalescence of Fe_2O_3 nanoparticles gave birth to tribo-oxide layer on the worn surfaces of H13 and GCr15steel,resulting in an obvious decrease of wear rate.The wear rate of 45 steel under a high load was higher than that under a low load,which was due to fracture of the tribo-oxide layers.

关 键 词：纳米氧化铁 摩擦氧化物层 基体硬度 磨损性能 

分 类 号：TH117.1[机械工程—机械设计及理论]