激光辐照下45#钢温度场的变化特性研究

Study on the Temperature Field Variation Characteristics of 45# Steel under Laser Irradiation

摘要: 本文利用有限元软件，来模拟激光辐照过程中45#钢温度场的变化情况，系统地研究了激光能量、空间位置(径向、深度)、时间等关键参数对45#钢温度场的影响。通过探究45#钢上表面不同位置温度随激光能量的变化规律、不同能量下径向温度分布特征、不同深度处径向温度变化趋势、上表面温度的瞬态变化过程及上表面温度云图分布，明确了激光辐照下45#钢温度场空间–时间上的变化趋势。研究结果为优化激光辐照45#钢的工艺参数(如激光能量、辐照时间)、减少热变形和组织缺陷提供了理论依据和数据支撑。

Abstract: This paper utilizes finite element software to simulate the temperature field changes in 45# steel during laser irradiation. A systematic investigation was conducted into the effects of key parameters—laser energy, spatial position (radial, depth), and time—on the temperature field of 45# steel. By investigating the variation of surface temperatures at different locations on 45# steel with respect to laser energy, characteristics of radial temperature distribution at different energies, radial temperature variation trends at different depths, transient temperature changes on the upper surface, and the temperature distribution map of the upper surface. The spatial-temporal evolution of the temperature field in 45# steel under laser irradiation has been clarified. The research findings provide a basis for optimizing the process parameters for laser irradiation of 45# steel, such as laser energy and irradiation time, reducing thermal deformation and microstructural defects, which provides both theoretical justification and data support.