Carbon Footprint Analysis And Process Optimization Of Laser Shock Peening Equipment

High end equipment is often used in high pressure,high temperature,strong corrosion and other severe working conditions,and the fatigue resistance,wear resistance and corrosion resistance of its key components cannot meet the requirements.Laser shock strengthening is a strengthening technology that uses the plasma shock wave generated by a strong laser beam to make the atoms inside the target extrude each other to generate residual stress,thereby improving the fatigue life of metal materials.It has outstanding advantages such as strong controllability and significant strengthening effect.However,because the high-energy laser shock strengthening equipment will produce a large amount of carbon emissions in the work process,reducing the carbon emissions generated in its work process is of great significance to achieve the strategic goal of "carbon peaking and carbon neutralization" in China.Based on this,the laser shock peening equipment of this topic is the research object,which deeply explores the carbon emission characteristics of laser shock peening equipment,builds a laser shock peening model,and deeply analyzes the influence of process parameters on carbon emission in the laser shock peening process and the optimization method of process parameters.The main research contents are as follows:(1)Aiming at the problem that the carbon emission model is difficult to build due to the complexity of the laser shock strengthening equipment subsystem and the numerous process parameters,the composition of the laser shock strengthening equipment system was analyzed in depth,and a carbon emission monitoring platform for laser shock strengthening was built to further explore the carbon emission characteristics of the laser shock strengthening process and the i MPact of process parameters on carbon emissions.On this basis,a carbon footprint model for the laser shock strengthening process was established,It lays a foundation for the subsequent construction of multi-objective optimization model of process parameters in laser shock strengthening process.(2)Aiming at the problem of the conflict between the collaborative optimization of carbon emission and quality in the laser shock strengthening process,based on the determination of the carbon emission objective function,a multi-objective process parameter optimization model of laser shock strengthening with comprehensive consideration of microhardness and residual stress is proposed,and a multi-objective optimization improvement method based on Cubic chaos initialization is proposed.The optimal process parameter combination is obtained through entropy weight gray correlation analysis and Pareto optimal solution set method,Realize green and low-carbon laser shock strengthening process.(3)In order to verify the effectiveness and feasibility of the method proposed in this paper,the laser shock strengthening experiment was carried out on Ta15 titanium alloy with laser shock strengthening equipment.From the aspects of carbon emission,microhardness and residual stress,the optimized process parameter combination and empirical industrial parameter combination are co MPared and analyzed.The results show that the carbon emission during laser shock strengthening is reduced by 41.3%;The microhardness increased by 7.19%;The residual stress is increased by 8.19%.The optimized process parameters can effectively reduce the carbon emission during laser shock strengthening and improve the quality of laser shock strengthening.