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Comparative study on the morphology and mechanical strength of induction welding joint of polyetheretherketone under different currents
Polymer Engineering and Science ( IF 3.2 ) Pub Date : 2020-09-15 , DOI: 10.1002/pen.25522
Feiyun Wang 1 , Wanping Ma 1 , Xiaohong Zhan 1 , Pingze Zhang 1 , Hengchang Bu 1
Affiliation  

There is an increasing need for joining technologies of polyetheretherketone (PEEK), in which induction welding technique is one of the most promising methods. The induction welding experiment of PEEK thin plates was conducted under different input currents in this research, while metal meshes were selected as induction components. The analysis of morphology, microstructure, and elemental composition of welding joints was performed by optical microscope (OM), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). Moreover, the mechanical strength of the induction‐welding joint was investigated by tensile test. The results indicate that the PEEK can be joined effectively when the metal mesh is selected as an induction component, and the welding joints with good appearance are formed under the appropriate process parameters. The more induced joule heat produced by the higher input current promotes the resin fusion at the interface, which is propitious to reduce the generation of defects. However, the excessive heat input results in the extreme melting and thermal decomposition of PEEK resin, which will deteriorate the morphology and property of the welding joints. When the input current is 5.2A, the induction‐welding joint can reach a maximum mechanical strength of 125.63 MPa, which increases by almost 60.55% through the optimization of welding parameters.

中文翻译:

不同电流下聚醚醚酮感应焊接接头的形态和机械强度的比较研究

对聚醚醚酮(PEEK)的连接技术的需求不断增长,其中感应焊接技术是最有前途的方法之一。本研究在不同输入电流下进行了PEEK薄板的感应焊接实验,同时选择金属网作为感应元件。通过光学显微镜(OM),扫描电子显微镜(SEM)和能量分散光谱(EDS)对焊接接头的形貌,微观结构和元素组成进行了分析。此外,通过拉伸试验研究了感应焊接接头的机械强度。结果表明,当金属网被选择为感应元件的PEEK可以有效地接合,并且具有良好的外观的焊接接头被下的合适的工艺参数形成的。高输入电流产生的更多的焦耳热会促进界面处的树脂熔化,这有利于减少缺陷的产生。然而,过多的热输入导致PEEK树脂的极度熔化和热分解,这将使焊接接头的形态和性能恶化。当输入电流为5.2A时,感应焊接接头可以达到125.63 MPa的最大机械强度,通过优化焊接参数可以将其提高近60.55%。这会降低焊接接头的形貌和性能。当输入电流为5.2A时,感应焊接接头可以达到125.63 MPa的最大机械强度,通过优化焊接参数可以将其提高近60.55%。这会降低焊接接头的形貌和性能。当输入电流为5.2A时,感应焊接接头可达到125.63 MPa的最大机械强度,通过优化焊接参数可将其提高近60.55%。
更新日期:2020-11-12
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