Affiliation:
1. School of Mechanical Engineering, Changzhou Vocational Institute of Mechatronic Technology, Changzhou 213164, China
2. School of Intelligent Manufacturing, Jiangsu College of Engineering and Technology, Nantong 226001, China
Abstract
Laser cavitation is a novel surface modification technology using the impact of bubble collapse and laser-induced plasma to induce plastic deformation and produce compressive residual stress on material surfaces. The effects of laser cavitation on surface properties and the cavitation erosion resistance of cast iron were studied. In this work, three-dimensional morphology and residual stress distribution of the laser cavitation area under different laser parameters was obtained, the variation regularities of the topographic range and impact depth of the affected area was discussed, and the weight loss rate of cast iron under different defocusing amounts was studied. It was found that laser cavitation can effectively improve the anti-cavitation erosion property of the cast iron surface, and the optimal value was reached when the defocusing amount was H = 1 mm. Combined with the various defocusing amounts and the variation trend of the weight loss rate of cavitation erosion, the cavitation erosion time corresponding to each stage of the cast iron (incubation, rise, decay, and stability) was obtained.
Funder
Postgraduate Research and Practice Innovation Program of Jiangsu Province
Subject
General Materials Science,Metals and Alloys