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磨损是材料常见的表面失效现象,粗糙度是数字化描述材料磨损表面形貌特征的最常用参数。采用激光共聚焦显微镜(LSCM),通过调节物镜倍率、测量视场和过滤参数等,能够得到材料磨损表面的真实形貌,同时能够对磨损表面三维(3D)形貌特征进行精确数字化描述。对常见的粗糙度值0.5~2.0μm磨损表面采用20×物镜扫描测量比较合适;粗糙度小于0.5μm的磨损表面宜采用50×物镜;粗糙度大于2.5μm宜采用10×物镜。对比较规则的磨损表面,采用1~3个物镜视场叠加扫描即可得到比较精确的粗糙度值;对于不太规则的磨损表面,则需要3~5个物镜视场叠加扫描。借助这一手段,采用上述优化参数对Cr5冷轧辊材料磨损各阶段试样表面形貌及粗糙度轮廓曲线进行表征、分析,效果较好。
Abrasion is a common surface failure of materials. Roughness is the most commonly used parameter for digitizing the topography of a worn surface of a material. By using confocal laser scanning microscopy (LSCM), the true shape of the worn surface of the material can be obtained by adjusting the magnification of the objective lens, measuring the field of view and the filtering parameters, and at the same time the accurate digitization of the three-dimensional (3D) topography of the worn surface can be described. For the common roughness value of 0.5 ~ 2.0μm wear surface using 20 × objective lens scanning measurement is more appropriate; roughness less than 0.5μm wear surface should be used 50 × objective lens; roughness greater than 2.5μm should adopt 10 × objective lens. For the regular wear surface, 1 ~ 3 objective field superposition scanning can get more accurate roughness value; for less regular wear surface, you need 3 ~ 5 objective field superposition scanning. With the help of this method, the above parameters are used to characterize and analyze the surface morphology and roughness profile curve of the Cr5 cold roll material wear stage, the effect is better.