基于激光共聚焦显微镜的洛氏硬度金刚石圆锥压头三维形貌校准方法OA

A calibration method is proposed for three-dimensional shape evaluation of Rockwell diamond conical indenters based on laser scanning confocal microscopy.High-resolution surface measurements were obtained from four sets of working indenters from different manufacturers and one standard indenter.By acquiring three-dimensional height data at the spherical tip and applying a least-squares fitting algorithm,the influence of sampling window size on the fitted radius was systematically analyzed.The results demonstrate that the proposed method enables comprehensive reconstruction of the indenter tip morphology and provides a quantitative assessment of local geometric deviations.Significant variations in local tip radius were observed under different simulated indentation depths,and distinct trends were identified among indenters from different manufacturers,reflecting the influence of processing techniques on consistency.Furthermore,a technical procedure for indenter morphology calibration was developed,including recommendations for scanning parameters,data fitting,and deviation evaluation.This approach offers a practical and accurate tool for assessing spherical tip of the Rockwell diamond conical indenters,providing essential data support for improving quality control in Rockwell hardness and scratch testing,as well as for enhancing traceability and standardization in hardness measurement.