为了研究激光增材制造熔池温度的影响因素, 对Inconel 625镍基高温合金激光增材制造过程的熔池温度进行了测试实验。实验测试结果表明, 激光增材制造过程熔池温度随着激光功率的增高, 扫描速度的降低, 送粉速率的降低而增高; 交错扫描的方式加工过程温度平稳; 扫描间距影响激光增材制造加工过程温度分布; 90°扫描转角情况下温度变化幅度最大; 用多元回归的方式构建激光熔池温度预测公式, 实验验证结果表明, 公式预测精度较高。

In order to study the impact of the temperature of molten pool of inconel 625 superalloy by laser additive manufacturing, testing the temperature of the molten pool. The results show that, the temperature of molten pool increased with the increase of the laser power, decreased with the increase of the scanning speed and reduced with the increase of the powder feeding rate. The temperature with a least change in interlaced scanning method, and the scanning space does influence to the temperature of molten pool. Temperature is difference with different scanning rotation angle, and the maximum value is in the 90 degree. The empirical formula with high accuracy is established to predict the temperature used the multivariate regression.