Thermal Efficiency Analysis for Laser-Assisted Plasma Arc Welding of AISI 304 Stainless Steel
Thermal Efficiency Analysis for Laser-Assisted Plasma Arc Welding of AISI 304 Stainless Steel
复制标题
DOI：
10.3390/ma12091460
复制
发表时间：
2019-05-01
期刊：
影响因子：
3.4
通讯作者：
Fuessel, Uwe
中科院分区：
文献类型：
--
作者：
Hipp, Dominik;Mahrle, Achim;Fuessel, Uwe
激光-电弧复合焊接过程中的协同效应可能会提高工艺效率。然而，这些效应背后的基本相互作用仍在讨论中，且存在一些相互矛盾的报道。在这项研究中，对特定的感兴趣的焊接参数进行了系统地改变，以进一步理解所涉及的现象。采用析因二水平实验设计（DoE）方法，从工艺效率、熔化效率和能量耦合效率方面对实验试验的协同效果进行了评估。结果表明，工艺效率的提高可归因于熔化效率的大幅提高，而能量耦合效率仅适度提高。因此，协同效应主要是由改变工件内部能量使用的二次机制引起的，而两个热源之间的直接相互作用可被排除为工艺效率提高的合理原因。结论是，不同尺寸的热源积极地改变了热流和质量流，从而导致了更高的性能水平。
Synergistic effects during hybrid laser-arc welding may cause increased process efficiencies. However, the basic interactions behind these effects are still being discussed, with some contradictory reports. In this study, particular welding parameters of interest were systematically varied to further the understanding of involved phenomena. The experimental trials are evaluated regarding their synergistic achievements in terms of process efficiency, melting efficiency and energy coupling efficiency using a factorial two-level Design-of-Experiment (DoE) approach. The results show that the growth in process efficiency can be attributed to a dramatic increase in melting efficiency whereas the energy coupling efficiency is only moderately increased. Thus, the synergistic effect is mainly caused by secondary mechanisms that change the energy usage inside the workpiece while direct interactions between the two heat sources can be excluded as a reasonable cause for increased process efficiencies. It is concluded that the different sizes of the heat sources change the heat and mass flow positively and consequently lead to a higher performance level.