Research on Forming Quality of AlSi10Mg Powder for SLM Process

Abstract

In order to study the forming quality of AlSi10Mg powder for SLM process without supporting structure, as well as lay the foundation of subsequence structural design of Aluminum SLM technique, a series of typical coupons have been designed and printed. Based on comprehensive consideration of layout direction, overhang angle, hole size, etc., Xline 2000R with optimized process parameter has been used as SLM equipment for AlSi10Mg powder. Through the analysis of printed coupons, the beneficial conclusion is made which can be used to guide future design, especially for the structure with complex shape.

Effect of defocusing distance on the forming quality of inner structure parts manufactured via selective laser melting

“…The main energy source is the laser transmission and the energy transfer of the surface powder, so the roughness is less affected by the increase of surface pressure. 10,18 What's more, the sharp contrast of three kinds of inner structure surface roughness and flatness also further verifies the existence of surface pressure.…”

“…The accuracy of inner structure, especially the size of horizontal direction, is closely related to powder bonding. 5,10,14 It further verifies the importance of powder bonding in forming accuracy. When the defocusing distance is 1.0 and 2.0 mm, the dimensional accuracy is obviously better than that of 0.0 and 3.0 mm.…”

“…[1][2][3][4] Selective laser melting (SLM), one of AM techniques, also caught researcher's eyes owing to its ability to form metal part. [5][6][7][8][9][10] As shown in Figure 1, metal powder was uniformly laid on the substrate by roller and then melted by laser beam according to predetermined scanning path. Unused metal powder was recycled through recovery system and the whole process was completed in inert shielding gas atmosphere.…”

Integrated Design and Manufacturing of Aviation Aluminum Alloy Support Based on SLM Technology

“…The island size is 50*50mm, the initial island rotation angle is 45°, and the island X, Y offset is 1mm. After the trial production of multiple rounds of material grade samples in the early stage, to ensure that the molded parts have lower porosity and better mechanical properties, the main process parameters of the optimal SLM forming are shown in Table 3 below [14] : ) is used to create the supporting structure, which adopts typical block structure, spacing (0.6mm) and island size (4mm) × 4mm), island spacing (0.5mm), as shown in Figure 5. The process simulation is carried out by using Simufact Additive (finite element software for simulation analysis of powder bed melt additive manufacturing process), and the relevant simulation parameters have passed the test calibration.…”