CoCrMoW alloy was formed by selective laser melting with different sloping angles using self-prepared spherical fine powder, its microstructure and mechanical properties were studied. The results indicate that microstructures of SLM samples are composed of γ phase in FCC structure and ε phase in HCP structure. With the increase of sloping angle, the alloy density decreases firstly and then increases gradually, and reaches at a maximum of 99.2% when the sloping angle is 90°. On the contrary, the surface roughness of the specimens increases initially and then decreases. A minimum roughness of 7.84 μm and a maximum roughness of 19.85 μm appear at 0° and 15°. Meanwhile, the ultimate tensile strength, elongation and microhardness arise initially, then drop afterward. The ultimate tensile strength and microhardness reach at a maximum of 1174 MPa and 412.5 HV, respectively, when the sloping angle is 60°. The elongation reaches at a maximum of 12.9% at an angle of 45°.%以自主制备的气雾化CoCrMoW合金球形微细粉末为原料,采用激光选区熔化(SLM)工艺成形出与加工平面成不同角度的试样,并研究其显微组织与物理力学性能.结果表明:成形试样主要由FCC的 γ 相和HCP的ε 相组成.随着成形倾斜角度的增大,试样的相对密度呈现先减小后增大的趋势,倾斜角为90°时,试样密度最高,相对密度达到99.2%;表面粗糙度呈现先增加后减小的趋势,在0°时达到最小值7.84μm,在15°时达到最大值19.85μm;抗拉强度、伸长率及显微硬度大致呈现先增大后减小的趋势,抗拉强度和显微硬度在60°时达到最大值,分别为1174MPa和412.5HV,伸长率在45°时达到最大值12.9%.
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