Study on Chemical Mechanism of Laser and Fluid Corrosion Combining Processing

Abstract

Medium plays an important role in the laser and fluid corrosion combining processing. Through X-ray diffraction analysis of chemical composition on the tool steel surface after laser-chemical processing, its chemical resultant is researched and analyzed. And the chemical reaction process of the laser and chemical hybrid etching of the tool steel material is explicated. Applied electron microscopy to surface morphology observation, under the action of laser beam, the effect of different chemical media corrosion on tool steel material is studied. The chemical mechanism of material removal of combining processing of laser and chemical corrosion on tool steels is discovered.

Detection Technologies of Laser Thermal Processing Quality

“…Laser and chemical hybrid processing: The authors proposed a new method of laser and chemical hybrid etching of large-scale processing difficult-cut-materials first in China. On the support of the National Natural Science Foundation, W18Cr4V high-speed steel, Crl2 mold steel, Al2O3 ceramic materials and so on were machined successively by laser and chemical hybrid processing applied Nd: YAG laser and hydrochloric acid, nitric acid 12,13 . In this study a series of detection methods and apparatus are used and its results demonstrated that the hybrid processing can speed up the etching rate, significantly improve the surface quality and solve series questions of surface defects of recast layer, slag, micro-cracks and low dimensional accuracy.…”