Wire Arc Additive Manufacturing (WAAM) technology provides opportunities for innovative product design and potential for a more cost effective to additive manufacture than alternative processes. The economics of the technology rely on the deposition rate of the process used. In the past the controlled short-circuit process, known as cold metal transfer (CMT), has been demonstrated to be an effective means of achieving reasonable deposition rates and component integrity. A development of CMT, known as CMT Twin, uses a two-wire, tandem arrangement to further improve deposition rate. The current investigation evaluated the comparative benefits and performance of CMT and CMT Twin for the additive manufacture of Nickel Aluminium Bronze (NAB) components for naval applications. The results indicate the potential for increased productivity for large components but the need to control inter-run cooling. The feasibility of in situ alloying with two wires of similar composition has also been demonstrated.

中文翻译：

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评估串联控制短路GMAW以改善大型镍铝青铜海军零件增材制造中的沉积

电弧电弧增材制造（WAAM）技术为创新产品设计提供了机会，并具有比替代工艺更具成本效益的增材制造潜力。该技术的经济性取决于所用工艺的沉积速率。过去，已证明受控的短路过程（称为冷金属转移（CMT））是实现合理沉积速率和组件完整性的有效手段。CMT的开发称为CMT Twin，它使用两线串联排列来进一步提高沉积速率。当前的调查评估了CMT和CMT Twin在海军制造的镍铝青铜（NAB）组件的增材制造中的相对优势和性能。结果表明，可能会提高大型零件的生产率，但需要控制运行间冷却。还已经证明了用两条具有相似成分的金属丝进行原位合金化的可行性。