高氮钢-不锈钢电弧增材制造表面形貌研究

Study of Surface Morphology of High Nitrogen Steel-stainless Steel Arc Additive

为了对异质材料电弧增材成型的结构机理进行研究,采用机器人电弧增材成型技术,对高氮钢多方式(普通单道、单道多层、多道单层)沉积表面进行分析,筛选最佳工艺参数、焊道间间距,进行电弧交织结构的增材成型。试验结果表明:高氮钢单道焊缝随着沉积速度增大,表面气孔减少;高氮钢多层多道沉积时,送丝速度增大,表面气孔增多;通过最佳焊道间距的预测,得到的过渡层表面平整,表面成形精度达到亚毫米级。

This paper makes a study of the structural mechanism of heterogeneous material arc additive manufacture,analyzes the deposition surface of high nitrogen steel(HNS)multi-channel(ordinary single channel,single channel multi-layer,multi-channel single layer)by robot arc additive manufacture technology and screens the optimal process parameters and the distance between the passes to carry out the materical forming of the arc intertwined structure.The results show that the surface pores are reduced with the increase of the deposition rate of the single-pass welds of the high-nitrogen steel.When the high-nitrogen steel is multi-channel multi-channel deposition,the wire feeding speed increases and the surface pores increase.,The surface of the transition layer is flat,the surface forming accuracy comes to sub-millimeter level.