基于统计方法的高速钢凸包型仿生表面磨损量建模

Wear modeling of convex bionic surface for high speed steel based on statistical methods

采用激光技术在W6Mo5Cr4V2高速钢试件表面加工出凸包型仿生单元。选取凸包的直径、间距和高度作为仿生单元参数,应用Box-Behnken中心组合试验设计方法,设计并进行高速钢仿生表面的摩擦磨损试验,通过回归分析,建立高速钢仿生表面磨损量与仿生单元参数之间的二阶数学模型。分别应用F检验法和相关系数检验法,验证磨损量数学模型显著。磨损量模型的预测精度分析和磨损试验表明,建立的数学模型能够描述磨损量与仿生单元参数之间的关系。通过方差分析,得到高速钢凸包型仿生单元参数对仿生表面磨损量的影响程度依次为间距、高度和直径。

Convex bionic units were fabricated on sample surface for W6Mo5Cr4V2 high speed steel material by laser processing technology. Convex diameter,spacing and height were selected as bionic unit parameters. Wear experiments of bionic surface for high speed steels were carried out with Box-Behnken central composite design. Second order wear mathematic model between mass loss and bionic unit parameters was established with regression analysis method. F-test method and correlation coefficient method were applied to finish significance test for wear mass loss model. Prediction accuracy of wear mass loss model was analyzed. And wear experiment for prediction accuracy was tested. Mathematic model can describe relationships between wear mass loss and bionic unit parameters. With variance analysis method,influence of bionic unit parameter ranking on wear mass loss is obtained as convex spacing,height and diameter.