论文部分内容阅读
利用有限元法在ANSYS环境中模拟了不同厚宽比、不同频率下的电流分布。结果表明,厚宽比大于1的情况下,电流分布更适合于交变电流辅助激光熔覆试验。此外,当交变电流频率增加时,基体表面的最大电流密度也随之增加,这将有利于更好地将电流作用于激光熔覆的熔池。此外,验证试验表明,在激光熔覆过程中施加交变电流,可使激光熔覆层中的孔隙率降低,并能细化晶粒。
The finite element method is used to simulate the current distribution under different aspect ratios and different frequencies in ANSYS environment. The results show that when the aspect ratio is greater than 1, the current distribution is more suitable for the alternating current assisted laser cladding test. In addition, when the alternating current frequency increases, the maximum current density of the substrate surface also increases, which will help to better the role of current in the laser cladding weld pool. In addition, verification tests show that applying alternating current during laser cladding reduces the porosity in the laser cladding layer and allows grain refinement.