为了获得高精度、高光洁度和高质量的随形水路模具, 达到良好冷却效果。采用HANS M160选区激光熔化(SLM)设备对1.270 9模具钢粉末进行单因素试验法探究重复扫描次数、扫描偏置对成形质量的影响, 并对比添加激光轮廓参数后对成形质量的影响。结果表明, 当激光功率150 W、扫描速度1 150 mm/s、扫描间距50 μm、铺粉层厚为30 μm, 轮廓扫描次数为1次、扫描偏置为0 mm时, 此时的输入能量密度为86.96%, 可以获得硬度367 HV0.1, 侧面粗糙度5.69 μm, 致密度高达98.61%。经过试验验证, 添加激光轮廓参数能改善制件的成形质量。

In order to obtainhigh-precision, high-gloss and high-quality conformal cooling channels die, achieve good cooling effect.The HANS M160 selective laser melting equipmentwas used to test 1.270 9 die steel powder. On the premise of guaranteeing the quality of the formed parts, the surface roughness of the conformal cooling channels was improved. The influence of repeated scanning times and scanning bias on the forming quality was investigated by single factor test method, and the influence of laser profile parameters on the forming quality was compared. The results show that when the laser power is 150 W, the scanning speed is 1 150 mm/s, the scanning distance is 50 μm, the thickness of powder layer is 30 μm, the number of contour scanning is 1, and the scanning bias is 0 mm, the input energy density is 86.96%. The best result is that the hardness is 367 HV0.1, the side roughness is 5.69 μm, and the density is 98.61%. The experimental results show that the forming quality of the parts can be improved by adding laser profile parameters.