激光选区熔化3D打印AlSi10Mg合金的铺粉厚度

Layer Thickness for SLM of 3D Printed AlSi10Mg Alloys

基于铺粉厚度优选出的3个工艺参数组合,分析了工艺参数组合对激光选区熔化技术成形AlSi10Mg合金试样基本性能的影响。3个工艺参数组合成形的试样硬度均高于63HRB,上表面单位面积磨损量均低于1.5×10^(-5) g/(s·mm^(2)),孔隙率在0.05%以下,抗拉强度高于440 MPa,成形的测试试样尺寸误差均在±0.1 mm以内。试样上表面的表面粗糙度Ra在4μm以下,侧表面的表面粗糙度Ra在5μm以下。铺粉厚度30μm的试样表面质量最优。

Based on three processing parameter combinations of optimized layer thickness,the influences of processing parameter combinations on the basic properties of AlSi10Mg alloy samples printed by SLM was analyzed.In samples of the three processing parameter combinations,hardness is more than 63HRB,wear loss of per area is below 1.5×10^(-5) g/(s·mm^(2)),porosity is below 0.05%,tensile strength is higher than 440 MPa,and dimensional errors are within±0.1 mm.Surface roughness Ra of the upper surface is less than 4μm,and surface roughness Ra of the side surface is less than 5μm.The surface quality of the samples printed by the layer thickness 30μm is the best.