【摘要】 以傅立叶热传导模型为基础,用有限元分析软件ANSYS对化学激光辐照铜锌合金HT62熔池温度场进行了数值模拟,并采用差示扫描量热法(DSC)测定了铜锌合金的比热容,求解出模拟计算中的关键热物性参数。结果表明:激光功率密度为17.95 kW.cm-2,光斑直径为6mm时,铜锌合金在辐照0.393 s时开始熔化,至辐照结束,形成直径为6.4 mm,深度1.64 mm的球冠形的熔池;使铜锌合金发生熔化所需的功率密度阈值为6.1~7.3 kW.cm-2;模拟结果与试验结果基体相符。该模拟可为激光辐照材料实际应用中选择合适的激光工艺参数提供依据。更多还原

【Abstract】 Molten pool temperature field of HT62 copper-zinc alloy radiated by chemical laser was numerical simulated by ANSYS finite element analysis soft ware based on the Fourier thermal conduction model.The specific heat capacity of the alloy was measured with DSC method and the key thermal characteristic parameters of the simulation were worked out.The results show that when the laser power density was 17.95 kW·cm-2 and spot diameter was 6 mm,the alloy began melting after radiated for 0.393 s,and a spherical cap molten pool with diameter of 6.4 mm and depth of 1.64 mm was formed at last.And power density threshold value for the alloy melting was 6.1-7.3 kW·cm-2.The simulation results are consistent with the test results.According to the simulation results,appropriate laser process parameters can be chosen in the practical application of materials radiated by laser.更多还原