摘要
为研究1Cr18Ni9Ti不锈钢钝化膜在H2O2水溶液中的摩擦学性能,对1Cr18Ni9Ti不锈钢表面进行了酸洗钝化处理,利用CS300电化学测试系统和XPS对不锈钢表面钝化膜的电化学行为、元素组成和化学状态进行了分析;用SST销-盘式摩擦磨损试验机研究了1Cr18Ni9Ti不锈钢盘与GCr15钢球摩擦副在不同浓度H2O2水溶液中配副时的摩擦学性能;用TR240形貌轮廓仪和扫描电子显微镜(SEM)观察分析了盘试样磨损处的轮廓形貌、磨痕面积和微区结构.结果表明,1Cr18Ni9Ti不锈钢经钝化工艺处理后,耐腐蚀性能显著提高,且表面形成一层富氧、富铬、贫铁的钝化膜,其主要成分是Cr2O3;钝化后的1Cr18Ni9Ti不锈钢在过氧化氢溶液中的摩擦系数较钝化前均出现不同程度的降低,耐磨性提高;钝化或未钝化的1Cr18Ni9Ti不锈钢在过氧化氢溶液中的磨损机理均表现为黏着磨损、磨粒磨损和腐蚀磨损,但在90%H2O2水溶液中,盘磨损表面的黏着作用明显减轻.
The tribological properties of the 1 Cr18Ni9Ti stainless steel （1 Cr18Ni9Ti SS） in different concentrations of hydrogen peroxide. The characterized techniques, ineluding the Electro -ehemical measurement system （CS3000） and X - ray photoelectron spectroscopy （PHI5702） were used to study the electrochemieal behavior and chemical composition of the passive film on the 1Cr18Ni9Ti SS surface. The wear behavior of 1Cr18Ni9Ti SS/ GCr15 steel rubbing pairs was investigated using a pin - on - disc tribometer. The friction coefficient and wear loss were collected and analyzed, TR240 profilometer, automated 3 D non - contact surface analysis （STIL） and SEM were employed to examine surface topographies, wear track, and microstructure on the worn surfaces of tested samples. The results indicate that the eorrosion resistanee of nitric acid passivated 1Cr18Ni9Ti SS inereased significantly due to the existence of passivation film which was mainly composed of chromic oxide. Moreover, 1Cr18Ni9Ti SS passivated with diluted nitric acid exhibited lower friction eoefficient and higher wear resistance than unpassivated one in hydrogen peroxide. It is suggested that the main wear meehanism was a mixture of adhesive wear, abrasive wear and corrosive wear for the passivated and unpassivated 1Cr18N9Ti SS in different eoneentration of hydrogen peroxide. Whereas the adhesive wear took a large alleviation in 90% H2O2 compared with other concentration.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2009年第1期17-24,共8页
Tribology
基金
国家重点基础研究发展计划资助项目(2007CB607603)
