本研究主要探討閃光銲接在鐵路軌道岔心中的銲接工藝及其影響要素。軌道岔心所使用的高錳鋼、鋼軌使用的高碳鋼、插入件的不鏽鋼，三者物理性質和化學成分完全不同，此類銲接屬於異質材料銲接，更需要注重加工參數的選擇，確保銲接品質的控制。本研究首先介紹閃光銲接的基本原理，並通過文獻回顧，探討異質鋼材銲接的相關研究，內容包括銲接方法、銲接參數、插入件的使用、銲後熱處理等，以期優化異質鋼材的銲接品質。同時，利用形態學分析閃光銲接過程主要的三階段：預熱、閃光和頂鍛，透過材料流、能量流和訊息流的系統性分析，有助於更全面地了解整個銲接過程，並針對特定應用選擇合適的技術和參數。
研究內容涉及銲接工藝流程、銲接參數選擇，以及銲接品質評估方法。分析涵蓋了閃光銲接的工作原理、影響銲接品質的主要因素和銲接過程中可能出現的缺陷及其成因。同時，介紹銲接品質檢測方法，包括非破壞性檢測、金相分析，以及力學性能測試。
透過對閃光銲接技術的深入探討，本研究提出了改善銲接工藝的措施，以應對銲接過程中可能遇到的相關問題。

This study primarily investigates the welding process of flash butt welding in rail frogs and its influencing factors. The rail frog uses high manganese steel, the rail track uses high carbon steel, and the insert uses stainless steel; all three materials have entirely different physical properties and chemical compositions. This type of welding is dissimilar material welding, which necessitates particular attention to the selection of processing parameters to ensure control of welding quality. This research first introduces the basic principles of flash butt welding and, through a literature review, discusses related studies on dissimilar steel material welding. By utilizing morphological analysis, the study examines three main stages of the flash butt welding process: preheating, flashing, and upsetting. Through systematic analysis of material flow, energy flow, and information flow, this helps to more comprehensively understand the entire welding process and select appropriate technologies and parameters for specific applications. The study addresses welding process flows, the selection of welding parameters, and methods of assessing welding quality. The analysis includes the working principles of flash butt welding, the main factors affecting welding quality, potential defects during the welding process and their causes. Additionally, the study introduces methods for assessing welding quality, including non-destructive testing, metallographic analysis, and mechanical property testing. Through an in-depth exploration of flash butt welding technology, this research proposes measures to improve the welding process to address potential issues encountered during the welding process.

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