选区激光熔化制备CuSn10薄壁件侧表面粗糙度研究

Study on Side Surface Roughness of CuSn10 Thin-walled Parts Prepared by Selective Laser Melting

研究了不同激光功率与扫描速度对SLM成形的单道CuSn10薄壁侧表面的表面形貌与粗糙度的影响,得出最优成形工艺;以上述工艺成形双道CuSn10薄壁件并研究了不同扫描间距对两成形侧表面粗糙度的影响;以上述扫描间距作为轮廓偏移量制备长直线扫描填充与短直线扫描填充的0.5 mm薄壁件。研究结果表明:在激光功率为195 W,扫描速度为550 mm/s时,成形单道薄壁件平均粗糙度最低为2.3μm±0.2μm;随着扫描间距的增大,第二成形面粗糙度减小,在扫描间距为120μm、140μm、160μm时,两平行熔道相互作用较低,对粗糙度影响较小;短直线扫描填充策略比长直线扫描填充策略成形的薄壁件侧表面粗糙度更小。当偏移量为160μm时,短直线扫描填充成形薄壁件侧表面平均粗糙度最小,达到2.27μm±0.4μm。

The effects of different laser power and scanning speed on the surface morphology and roughness of single track CuSn10 thin-walled side surface fabricated by SLM were studied in this paper.Moreover,the optimized manufacturing process was obtained.Double track CuSn10 thin-walled parts were fabricated by the above process,and the effects of different scanning space on the surface roughness of the two forming sides were studied.Taking the above scanning space as the contour offset,0.5 mm thin-walled parts were fabricated with two scanning strategies of long linear scanning filling and short linear scanning filling.Results show that when the laser power is 195 W and the scanning speed is 550 mm/s,the minimum average roughness of single track thin-walled parts is 2.3μm±0.2μm.With the increase of scanning space,the roughness of the second forming surface decreases.When the scanning space is 120μm,140μm,160μm,the interaction between the two parallel melting is low,and the effect on the roughness is small.The short linear scanning filling has a lower surface roughness value than the long linear scanning filling.When the offset is 160μm,the minimum average roughness value of the side surface of the thin-walled part manufactured by short linear scanning filling is 2.27μm±0.4μm.