利用激光选区熔化（SLM）技术制备厚度为0.1~0.8 mm的AlSi10Mg铝合金薄板以及内腔间隙为0.5 mm的中空板，研究了薄壁结构SLM成形的可行性及成形件的力学性能。结果表明：SLM技术能够成形出壁厚0.2 mm以上的薄板以及空腔间隙0.5 mm的空心板，但厚度0.5，0.6 mm的薄板出现空心现象，通过减小光斑尺寸及调整轮廓工艺参数进一步提高了SLM成形薄板的精度，避免出现空心薄板；SLM成形薄板及经T6热处理后的抗拉强度均超过200 MPa，0.7 mm厚试样的力学性能较好；采用试验用SLM参数能够打印出薄壁、封闭腔散热器产品。

AlSi10Mg aluminum alloy thin sheets with thickness of 0.1-0.8 mm and hollow sheets with inner cavity gap of 0.5 mm were prepared by selective laser melting (SLM) technique. The feasibility of thin-walled structure SLM forming and mechanical properties of the formed parts were studied. The results show that the SLM technique could form thin sheets with wall thickness of more than 0.2 mm and hollow sheets with a cavity gap of 0.5 mm, but there was a hollow in the sheets with thickness of 0.5, 0.6 mm. The precision of SLM formed sheets was further improved by reducing the spot size and adjusting the contour process parameters, and the hollow thin sheet was avoided. The tensile strength of SLM formed and T6 heat-treated thin sheets were both over 200 MPa, and the specimen with thickness of 0.7 mm showed better mechanical properties. Adopting the test SLM process parameters could print thin-walled, closed-cavity radiator products successfully.