INFLUENCE OF PROCESS PARAMETERS ON ARC ADDITIVE MANUFACTURING WORKPIECES
Arc additive manufacturing has the characteristics of high deposition rate,high quality and no size limitation,which can meet the production requirements of medium and large parts with high mechanical properties.In the process of arc additive manufacturing of AlMg alloy,the preparation parameters have an important effect on the macroscopic morphology,microstructure and mechanical properties of the workpiece.In this paper,the effects of welding parameters such as coil tightness,welding speed,welding current and interlayer waiting time on the forming of AlMg alloy by arc additive manufacturing were studied.The research shows that when the tightness of the wire pan is 2,the wire feeding of the additive equipment is smooth and the weld bead forming effect is good.The smaller the welding speed,the larger the heat input value generated by the additive process.When the welding speed is 36 cm/min,the forming defects of single-pass weld are least and the forming effect is good.The larger the welding current is,the larger the heat input value generated by the additive process is.When the welding current is 65 A,the weld pass morphology is uniform.When the interlayer waiting time is increased to 150 s,the grain size of the alloy is uniform and fine,and the average grain size decreases to 52.9 μm.
arc additive manufacturingwelding speedforming morphologyinterlayer wait time
万方数据
维普
