水下多层异质材料激光热熔切割的工艺仿真研究

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Abstract： Laser underwater cutting technology，withits advantages ofadapting toconfined spaces，high densityand minimal heat input，canovercomethe shortcomings of conventional mechanical methods.Itofers the feasibility of efficientand clean processng，and thus holds broad application prospects within the nuclear industry. In this paper， the simulation method is utilized to simulate the underwater cutting ofa stainless steel-alumina multiphase flow model， investigating the effects of three cutting parameters—laser power，cutting speed and heat source radiuson therisk of leakage from the inner layer of alumina material.The simulation results were fited and analyzed to explore the combined influence of laser power and cuting speed on the leakage risk of the inner layer of alumina material.The results indicate that when the other two parameters are constant，the increaseof laser power wil increase the risk of leakage of the inner layer of alumina material.The increase of laser cuting speed willalso increase theriskof leakage of inner layer alumina material; However，the laser radius has litle effect on the risk ofalumina leakage in the inner layer.Underthecombinedaction of these two variables，the high laserpowerand small cutting speed willreduce the leakage risk of the inner layer of alumina material.The work done in this paper cananalyze the important influencing factorsand trendrelationships inthecutting process of underwater multilayer heterogeneous materials，so as to reduce the experimental workload and save costs.

Keywords： laser underwater cuting; multi-layer heterogeneous materials; nuclear; simulation method

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核电是安全、清洁、低碳、高能量密度的战略能源[1]，随着核电的服役年限增加，核工业设施也逐渐老化，许多国家面临着以核电站为代表的核工业设施退役问题[2]。（剩余6960字）