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題名 | 銲接組織中晶內針狀肥粒鐵形成潛力之計算模式 |
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作者 | 李至隆; 潘永村; | 書刊名 | 材料科學 |
卷期 | 26:3 1994.09[民83.09] |
頁次 | 頁194-205 |
分類號 | 454.86 |
關鍵詞 | 晶內成核; 針狀肥粒鐵; 銲接組織; 計算模式; Intragranular acicular ferrite; Nucleation potential; Welding microstructure; Calculation model; |
語文 | 中文(Chinese) |
中文摘要 | 本研究藉由計算晶內及晶界成核表面積,以及考慮介在物對沃斯田鐵晶 粒大小的影響,建立一個晶內針狀肥粒鐵形成潛力之評估模式。此模式可用來分 離影響針狀肥粒鐵生成的因素,以利對實驗室或文獻中之實驗數據做綜合分析計 算。此模式預測,加粗沃斯田鐵晶粒,增大介在物粒徑,以及減少介在物之體積 分率,皆有助於提高針狀肥粒鐵之形成潛力。對文獻中數據的分析顯示,TiO介 在物較TiN具優良之成核能力;介在物要具有良好的成核能力,其粒徑至少要大於 0.25μm。 |
英文摘要 | A model, based on the calculation of intra granular nucleation area and grain boundary nucleationarea, has been developed to evaluate the formation potential of intra granular iicicular ferrite (IAF).The effects of the particle size and volume fraction of inclusions on the grain size and grain boundary nucleation area of austenite are also considered. Based on this model, the factors affecting the formation potential of IAF can be individually analyzed. The model indicates that the formation potential of IAF can be increased by enlarging the austenite grain size, increasing the inclusion size, and decreasing the volume fraction of inclusions. The analysis of data from heat affected zone and weld metals shows that TiO inclusions have higher nucleation potential than TiN inclusions and inclusions with size larger than 0.25μm can ensure a good intra granular nucleation ability. |
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