本文利用電磁學、熱傳學等相關學理，建立合適的電磁場與溫度場模擬模型，結合數值分析的方法分析雙金屬料管的感應加熱製程中的三維溫度場變化，探討其電磁現象如：磁通密度(magnIetic flux density vector)、磁位能(magnetic vector potential)、電場強度(electric field vector)和感應電流(eddy current)，並討論加熱工件的物理特性對電磁感應加熱影響，如：熱傳導係數(thermal conductivity)、比熱(specific heat)、密度(density)、電阻係數(resistivity)和相對導磁係數(relative permeability)。

　　在溫度模擬上，比較中鋼公司所提供的三組實驗數據：Pipe A (內徑29(mm)，外徑95(mm)，長度1000(mm))、Pipe B (內徑39(mm)，外徑110(mm)，長度1120(mm))、Pipe C (內徑47(mm)，外徑131(mm)，長度1450(mm))，對其內外壁溫度表現和數值模擬的溫度變化作相互比對，其整體相對誤差約為15％。
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　　另外，改變了一些變數，如：輸入電壓的增減、交變電流頻率的改變、加熱線圈和加熱工件的間距改變、失磁後相對導磁係數的大小設定等，畫出溫度對時間變化圖，加以討論分析。

　The study utilizing electro-magneticism and heat transfer is to create a proper simulation model of electro-magnetic field and temperature field. To discuss the numerical analysis for bi-metallic tube and the 2-D temperature difference during the process of induction heating. This paper confers with the electro-magnetic phenomenon like magnetic flux density vector, magnetic vector potential, electric field vector and eddy current, and also discusses the physic characteristic that influences the temperature like thermal conductivity, specific heat, density, resistivity and relative permeability.

　The paper uses three different dimensions of metallic tubes for Pipe A, Pipe B and Pipe C, respectively. It compared the temperature of bi-metallic tube between the experimental data and simulation results to certify correction of simulation scheme.

　Finally, different parameters such as input voltage, current frequency, distance between coil and workpiece, and the relative permeability of workpiece were discussed in the paper.

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