DESIGN OF AN IN SITU DETECTION SYSTEM FOR LASER HARDENED WIDTH

In this paper, a measurement strategy for laser-hardened width was presented. The hardened zone is determined by the temperature distribution of the workpiece, and the temperature of object affects the gray value of images obtained in laser hardening. A color CCD was used to take the heat radiation images in real-time during laser transformation surface hardening. Detection system software was developed on the Visual C++, with which the different temperature distribution was displayed clearly and then the hardened width was obtained by image processing and threshold segmentation.The detection system, which maybe serve quality control for laser hardening, was verified experimentally.