Influences of scratches and long reserve time on identification reliability were discussed; Then, the influences of barcode depth, barcode roughness and the area of heat on surface quality were studied.

• 研究了条码划伤和刀具储存等对识别可靠性的影响，以及条码标刻深度、表面粗糙度和热影响区等对表面质量的影响。