Abstract

Typical metal 3D printing processes with powders require either a laser or electron beam as the heating source. In this work, an alternative non-expensive metal 3D printing process based on the fused deposition modeling process using metal filled filament is studied. Using bronze filament as a feedstock, the microstructures, phases, compositions of the filament, as-printed, and sintered specimens are analyzed. The 3D printing process basically does not modify the morphology and phases of the filament. Sintering temperature below 832 °C is recommended. Above 832 °C, there are substantial oxidation reactions leading to the formation of copper oxide and cassiterite shell structure around the bronze core. The mechanical properties of the 3D-printed sample are measured using the three-point bending test. The measured flexural strength is 27.9 MPa, and the modulus of elasticity is 1.2 GPa. This study provides important information for applying the bronze filament in future engineering applications.

中文翻译：

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使用青铜金属丝的3D打印组件的组织和相分析

摘要

具有粉末的典型金属3D打印过程需要激光束或电子束作为加热源。在这项工作中，研究了一种替代的非昂贵金属3D打印过程，该过程基于使用金属填充丝的熔融沉积建模过程。使用青铜丝作为原料，分析了丝的微观结构，相，组成，印刷后的样品和烧结的样品。3D打印过程基本上不会改变灯丝的形态和相。建议烧结温度低于832°C。高于832°C，就会发生大量的氧化反应，从而在青铜芯周围形成氧化铜和锡石壳结构。使用三点弯曲测试测量3D打印样品的机械性能。测得的抗弯强度为27.9 MPa，弹性模量为1.2 GPa。这项研究为将来的工程应用中应用青铜丝提供了重要的信息。