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首页> 外文期刊>Journal of Materials Engineering and Performance >Titanium Castings Using Laser-Scanned Data and Selective Laser-Sintered Zirconia Molds
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Titanium Castings Using Laser-Scanned Data and Selective Laser-Sintered Zirconia Molds

机译：使用激光扫描数据和选择性激光烧结氧化锆模具的钛铸件

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摘要

Titanium casting molds, made of stabilized and unstabilized zirconium oxide, were created using a combination of selective laser sintering (SLS) and colloidal infiltration. The mold material system was chosen for its thermal shock resistance and low reactivity with molten titanium. The starting material, stabilized zirconia powder mixed with a copolymer binder, was laser sintered into the desired green shape. The binder was removed during pyrolysis and replaced by unstabilized zirconia. As infiltrant weight gain increased, the density, flexural strength, and surface roughness improved to levels adequate for titanium casting trials. A half-scale casting mold for the ball of a human femur bone was produced from laser-scanned data and cast with Ti-6Al-4V alloy. The castings exhibited an as-cast surface roughness (R_a) of 8 #mu#m and a typical microstructure. This work demonstrates a feasible method of producing complex titanium castings for one-of-a-kind and custom components without the necessity of part-specific tooling or wax patterns.
机译：钛铸模由稳定的和不稳定的氧化锆制成，是通过选择性激光烧结（SLS）和胶体渗透相结合制成的。选择模具材料系统是因为其具有抗热震性和与熔融钛的低反应性。将原材料（稳定化的氧化锆粉末与共聚物粘合剂混合）激光烧结成所需的生坯形状。在热解过程中除去粘合剂，并用不稳定的氧化锆代替。随着浸润剂重量增加，密度，弯曲强度和表面粗糙度提高到足以进行钛铸造试验的水平。根据激光扫描数据生产用于人类股骨球的半比例铸模，并用Ti-6Al-4V合金铸造。铸件的铸态表面粗糙度（R_a）为8＃mu＃m，具有典型的微观结构。这项工作证明了一种生产一种和一种定制零件的复杂钛铸件的可行方法，而无需使用零件专用的工具或蜡模。

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