NS 3303镍基合金脉冲MIG焊接性能的优化研究

Optimization of Pulsed MIG Welding Performance of NS 3303 Nickel Based Alloy

以脉冲MIG焊接电流电压波形和高速摄影图像为主要评价依据,通过调整脉冲峰值电流和基值电流,使NS 3303镍基合金在能够稳定焊接的前提下,热输入最小。试验结果表明,当平均电流为160A,脉冲峰值电流为355 A,基值电流为45 A时,焊接过程稳定,熔滴过渡平稳,同时热输入相对较低。采用上述试验方法,将全电流域内的峰值电流和基值电流重新匹配,做成NS 3303镍基合金专用的焊接数据,为镍基合金的脉冲MIG焊接提供了有效的数据支持。

Taking the pulse MIG welding current voltage waveforms and high-speed photographic image as the main evaluation basis, by adjusting the pulse peak current and base current, the NS 3303 nickel based alloy can be welded stably and the heat input is minimized. The experimental results show that when the average current is 160 A, the pulse peak current is355 A and the base current is 45 A, the welding process is stable, the droplet transition is stable and the heat input is minimized. By means of the above test method, the peak and base current values were rematched completely, a new welding data for NS 3303 nickel based alloy was done. It provides effective data support for pulsed MIG welding of nickel based alloys.